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Press Q or Ctrl+C to abort.
Affect< span class = "token punctuation" > (< / span > class-cnt:1 , method-cnt:1< span class = "token punctuation" > )< / span > cost < span class = "token keyword" > in< / span > < span class = "token number" > 28< / span > ms.
< span class = "token variable" > < span class = "token variable" > `< / span > ---ts< span class = "token operator" > =< / span > < span class = "token number" > 2019< / span > -12-04 00:45:08< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > thread_name< / span > < span class = "token operator" > =< / span > main< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > id< / span > < span class = "token operator" > =< / span > < span class = "token number" > 1< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > is_daemon< / span > < span class = "token operator" > =< / span > false< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > priority< / span > < span class = "token operator" > =< / span > < span class = "token number" > 5< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > TCCL< / span > < span class = "token operator" > =< / span > sun.misc.Launcher$AppClassLoader@3d4eac69
< span class = "token variable" > `< / span > < / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .617465ms< span class = "token punctuation" > ]< / span > demo.MathGame:run< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
< span class = "token variable" > < span class = "token variable" > `< / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .078946ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #24 [throws Exception]< / span >
< span class = "token variable" > `< / span > < / span > ---ts< span class = "token operator" > =< / span > < span class = "token number" > 2019< / span > -12-04 00:45:09< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > thread_name< / span > < span class = "token operator" > =< / span > main< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > id< / span > < span class = "token operator" > =< / span > < span class = "token number" > 1< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > is_daemon< / span > < span class = "token operator" > =< / span > false< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > priority< / span > < span class = "token operator" > =< / span > < span class = "token number" > 5< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > TCCL< / span > < span class = "token operator" > =< / span > sun.misc.Launcher< span class = "token variable" > $AppClassLoader< / span > @3d4eac69
< span class = "token variable" > < span class = "token variable" > `< / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 1< / span > .276874ms< span class = "token punctuation" > ]< / span > demo.MathGame:run< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
< span class = "token variable" > `< / span > < / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .03752ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #24 [throws Exception]< / span >
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < / div > < / div > < div class = "custom-container tip" > < p class = "custom-container-title" > 提示< / p > < p > 结果里的 < code > #24< / code > ，表示在 run 函数里，在源文件的第< code > 24< / code > 行调用了< code > primeFactors()< / code > 函数。< / p > < / div > < h3 id = "指定-class-匹配的最大数量" tabindex = "-1" > < a class = "header-anchor" href = "#指定-class-匹配的最大数量" aria-hidden = "true" > #< / a > 指定 Class 匹配的最大数量< / h3 > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ trace demo.MathGame run < span class = "token parameter variable" > -m< / span > < span class = "token number" > 1< / span >
Press Q or Ctrl+C to abort.
Affect< span class = "token punctuation" > (< / span > class count: < span class = "token number" > 1< / span > , method count: < span class = "token number" > 1< / span > < span class = "token punctuation" > )< / span > cost < span class = "token keyword" > in< / span > < span class = "token number" > 412< / span > ms, listenerId: < span class = "token number" > 4< / span >
< span class = "token variable" > < span class = "token variable" > `< / span > ---ts< span class = "token operator" > =< / span > < span class = "token number" > 2022< / span > -12-25 < span class = "token number" > 21< / span > :00:00< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > thread_name< / span > < span class = "token operator" > =< / span > main< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > id< / span > < span class = "token operator" > =< / span > < span class = "token number" > 1< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > is_daemon< / span > < span class = "token operator" > =< / span > false< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > priority< / span > < span class = "token operator" > =< / span > < span class = "token number" > 5< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > TCCL< / span > < span class = "token operator" > =< / span > sun.misc.Launcher$AppClassLoader@b4aac2
< span class = "token variable" > `< / span > < / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .762093ms< span class = "token punctuation" > ]< / span > demo.MathGame:run< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
< span class = "token variable" > < span class = "token variable" > `< / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 30.21< / span > % < span class = "token number" > 0< / span > .230241ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #46 [throws Exception]< / span >
< span class = "token variable" > `< / span > < / span > ---ts< span class = "token operator" > =< / span > < span class = "token number" > 2022< / span > -12-25 < span class = "token number" > 21< / span > :00:10< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > thread_name< / span > < span class = "token operator" > =< / span > main< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > id< / span > < span class = "token operator" > =< / span > < span class = "token number" > 1< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > is_daemon< / span > < span class = "token operator" > =< / span > false< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > priority< / span > < span class = "token operator" > =< / span > < span class = "token number" > 5< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > TCCL< / span > < span class = "token operator" > =< / span > sun.misc.Launcher< span class = "token variable" > $AppClassLoader< / span > @b4aac2
< span class = "token variable" > < span class = "token variable" > `< / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .315298ms< span class = "token punctuation" > ]< / span > demo.MathGame:run< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
< span class = "token variable" > `< / span > < / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 13.95< / span > % < span class = "token number" > 0< / span > .043995ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #46 [throws Exception]< / span >
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < / div > < / div > < h3 id = "trace-次数限制" tabindex = "-1" > < a class = "header-anchor" href = "#trace-次数限制" aria-hidden = "true" > #< / a > trace 次数限制< / h3 > < p > 如果方法调用的次数很多，那么可以用< code > -n< / code > 参数指定捕捉结果的次数。比如下面的例子里，捕捉到一次调用就退出命令。< / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ trace demo.MathGame run < span class = "token parameter variable" > -n< / span > < span class = "token number" > 1< / span >
Press Q or Ctrl+C to abort.
Affect< span class = "token punctuation" > (< / span > class-cnt:1 , method-cnt:1< span class = "token punctuation" > )< / span > cost < span class = "token keyword" > in< / span > < span class = "token number" > 20< / span > ms.
< span class = "token variable" > < span class = "token variable" > `< / span > ---ts< span class = "token operator" > =< / span > < span class = "token number" > 2019< / span > -12-04 00:45:53< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > thread_name< / span > < span class = "token operator" > =< / span > main< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > id< / span > < span class = "token operator" > =< / span > < span class = "token number" > 1< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > is_daemon< / span > < span class = "token operator" > =< / span > false< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > priority< / span > < span class = "token operator" > =< / span > < span class = "token number" > 5< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > TCCL< / span > < span class = "token operator" > =< / span > sun.misc.Launcher$AppClassLoader@3d4eac69
< span class = "token variable" > `< / span > < / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .549379ms< span class = "token punctuation" > ]< / span > demo.MathGame:run< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .059839ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #24< / span >
`---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .232887ms< span class = "token punctuation" > ]< / span > demo.MathGame:print< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #25< / span >
Command execution < span class = "token builtin class-name" > times< / span > exceed limit: < span class = "token number" > 1< / span > , so < span class = "token builtin class-name" > command< / span > will exit. You can < span class = "token builtin class-name" > set< / span > it with < span class = "token parameter variable" > -n< / span > option.
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < / div > < / div > < h3 id = "包含-jdk-的函数" tabindex = "-1" > < a class = "header-anchor" href = "#包含-jdk-的函数" aria-hidden = "true" > #< / a > 包含 jdk 的函数< / h3 > < ul > < li > < code > --skipJDKMethod < value> < / code > skip jdk method trace, default value true.< / li > < / ul > < p > 默认情况下， < code > --skipJDKMethod false< / code > 。< / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ trace < span class = "token parameter variable" > --skipJDKMethod< / span > < span class = "token boolean" > false< / span > demo.MathGame run
Press Q or Ctrl+C to abort.
Affect< span class = "token punctuation" > (< / span > class-cnt:1 , method-cnt:1< span class = "token punctuation" > )< / span > cost < span class = "token keyword" > in< / span > < span class = "token number" > 60< / span > ms.
< span class = "token variable" > < span class = "token variable" > `< / span > ---ts< span class = "token operator" > =< / span > < span class = "token number" > 2019< / span > -12-04 00:44:41< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > thread_name< / span > < span class = "token operator" > =< / span > main< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > id< / span > < span class = "token operator" > =< / span > < span class = "token number" > 1< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > is_daemon< / span > < span class = "token operator" > =< / span > false< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > priority< / span > < span class = "token operator" > =< / span > < span class = "token number" > 5< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > TCCL< / span > < span class = "token operator" > =< / span > sun.misc.Launcher$AppClassLoader@3d4eac69
< span class = "token variable" > `< / span > < / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 1< / span > .357742ms< span class = "token punctuation" > ]< / span > demo.MathGame:run< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .028624ms< span class = "token punctuation" > ]< / span > java.util.Random:nextInt< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #23< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .045534ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #24 [throws Exception]< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .005372ms< span class = "token punctuation" > ]< / span > java.lang.StringBuilder:< span class = "token operator" > < < / span > init< span class = "token operator" > > < / span > < span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #28< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .012257ms< span class = "token punctuation" > ]< / span > java.lang.Integer:valueOf< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #28< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .234537ms< span class = "token punctuation" > ]< / span > java.lang.String:format< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #28< / span >
+---< span class = "token punctuation" > [< / span > min< span class = "token operator" > =< / span > < span class = "token number" > 0< / span > .004539ms,max< span class = "token operator" > =< / span > < span class = "token number" > 0< / span > .005778ms,total< span class = "token operator" > =< / span > < span class = "token number" > 0< / span > .010317ms,count< span class = "token operator" > =< / span > < span class = "token number" > 2< / span > < span class = "token punctuation" > ]< / span > java.lang.StringBuilder:append< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #28< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .013777ms< span class = "token punctuation" > ]< / span > java.lang.Exception:getMessage< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #28< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .004935ms< span class = "token punctuation" > ]< / span > java.lang.StringBuilder:toString< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #28< / span >
< span class = "token variable" > < span class = "token variable" > `< / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .06941ms< span class = "token punctuation" > ]< / span > java.io.PrintStream:println< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #28< / span >
< span class = "token variable" > `< / span > < / span > ---ts< span class = "token operator" > =< / span > < span class = "token number" > 2019< / span > -12-04 00:44:42< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > thread_name< / span > < span class = "token operator" > =< / span > main< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > id< / span > < span class = "token operator" > =< / span > < span class = "token number" > 1< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > is_daemon< / span > < span class = "token operator" > =< / span > false< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > priority< / span > < span class = "token operator" > =< / span > < span class = "token number" > 5< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > TCCL< / span > < span class = "token operator" > =< / span > sun.misc.Launcher< span class = "token variable" > $AppClassLoader< / span > @3d4eac69
< span class = "token variable" > < span class = "token variable" > `< / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 3< / span > .030432ms< span class = "token punctuation" > ]< / span > demo.MathGame:run< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .010473ms< span class = "token punctuation" > ]< / span > java.util.Random:nextInt< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #23< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .023715ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #24 [throws Exception]< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .005198ms< span class = "token punctuation" > ]< / span > java.lang.StringBuilder:< span class = "token operator" > < < / span > init< span class = "token operator" > > < / span > < span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #28< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .006405ms< span class = "token punctuation" > ]< / span > java.lang.Integer:valueOf< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #28< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .178583ms< span class = "token punctuation" > ]< / span > java.lang.String:format< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #28< / span >
+---< span class = "token punctuation" > [< / span > min< span class = "token operator" > =< / span > < span class = "token number" > 0< / span > .011636ms,max< span class = "token operator" > =< / span > < span class = "token number" > 0< / span > .838077ms,total< span class = "token operator" > =< / span > < span class = "token number" > 0< / span > .849713ms,count< span class = "token operator" > =< / span > < span class = "token number" > 2< / span > < span class = "token punctuation" > ]< / span > java.lang.StringBuilder:append< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #28< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .008747ms< span class = "token punctuation" > ]< / span > java.lang.Exception:getMessage< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #28< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .019768ms< span class = "token punctuation" > ]< / span > java.lang.StringBuilder:toString< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #28< / span >
< span class = "token variable" > `< / span > < / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .076457ms< span class = "token punctuation" > ]< / span > java.io.PrintStream:println< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #28< / span >
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < / div > < / div > < h3 id = "根据调用耗时过滤" tabindex = "-1" > < a class = "header-anchor" href = "#根据调用耗时过滤" aria-hidden = "true" > #< / a > 根据调用耗时过滤< / h3 > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ trace demo.MathGame run < span class = "token string" > ' #cost > 10' < / span >
Press Ctrl+C to abort.
Affect< span class = "token punctuation" > (< / span > class-cnt:1 , method-cnt:1< span class = "token punctuation" > )< / span > cost < span class = "token keyword" > in< / span > < span class = "token number" > 41< / span > ms.
< span class = "token variable" > < span class = "token variable" > `< / span > ---ts< span class = "token operator" > =< / span > < span class = "token number" > 2018< / span > -12-04 01:12:02< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > thread_name< / span > < span class = "token operator" > =< / span > main< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > id< / span > < span class = "token operator" > =< / span > < span class = "token number" > 1< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > is_daemon< / span > < span class = "token operator" > =< / span > false< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > priority< / span > < span class = "token operator" > =< / span > < span class = "token number" > 5< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > TCCL< / span > < span class = "token operator" > =< / span > sun.misc.Launcher$AppClassLoader@3d4eac69
< span class = "token variable" > `< / span > < / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 12< / span > .033735ms< span class = "token punctuation" > ]< / span > demo.MathGame:run< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .006783ms< span class = "token punctuation" > ]< / span > java.util.Random:nextInt< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 11< / span > .852594ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
`---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .05447ms< span class = "token punctuation" > ]< / span > demo.MathGame:print< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < / div > < / div > < div class = "custom-container tip" > < p class = "custom-container-title" > 提示< / p > < p > 只会展示耗时大于 10ms 的调用路径，有助于在排查问题的时候，只关注异常情况< / p > < / div > < ul > < li > 是不是很眼熟，没错，在 JProfiler 等收费软件中你曾经见识类似的功能，这里你将可以通过命令就能打印出指定调用路径。 友情提醒下，< code > trace< / code > 在执行的过程中本身是会有一定的性能开销，在统计的报告中并未像 JProfiler 一样预先减去其自身的统计开销。所以这统计出来有些许的不准，渲染路径上调用的类、方法越多，性能偏差越大。但还是能让你看清一些事情的。< / li > < li > [12.033735ms] 的含义，< code > 12.033735< / code > 的含义是：当前节点在当前步骤的耗时，单位为毫秒< / li > < li > [0,0,0ms,11]xxx:yyy() [throws Exception]，对该方法中相同的方法调用进行了合并，< code > 0,0,0ms,11< / code > 表示方法调用耗时，< code > min,max,total,count< / code > ； < code > throws Exception< / code > 表明该方法调用中存在异常返回< / li > < li > 这里存在一个统计不准确的问题，就是所有方法耗时加起来可能会小于该监测方法的总耗时，这个是由于 Arthas 本身的逻辑会有一定的耗时< / li > < / ul > < h3 id = "trace-多个类或者多个函数" tabindex = "-1" > < a class = "header-anchor" href = "#trace-多个类或者多个函数" aria-hidden = "true" > #< / a > trace 多个类或者多个函数< / h3 > < p > trace 命令只会 trace 匹配到的函数里的子调用，并不会向下 trace 多层。因为 trace 是代价比较贵的，多层 trace 可能会导致最终要 trace 的类和函数非常多。< / p > < p > 可以用正则表匹配路径上的多个类和函数，一定程度上达到多层 trace 的效果。< / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > trace < span class = "token parameter variable" > -E< / span > com.test.ClassA< span class = "token operator" > |< / span > org.test.ClassB method1< span class = "token operator" > |< / span > method2< span class = "token operator" > |< / span > method3
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < / div > < / div > < h3 id = "排除掉指定的类" tabindex = "-1" > < a class = "header-anchor" href = "#排除掉指定的类" aria-hidden = "true" > #< / a > 排除掉指定的类< / h3 > < p > 使用 < code > --exclude-class-pattern< / code > 参数可以排除掉指定的类，比如：< / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > trace javax.servlet.Filter * --exclude-class-pattern com.demo.TestFilter
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < / div > < / div > < h2 id = "动态-trace" tabindex = "-1" > < a class = "header-anchor" href = "#动态-trace" aria-hidden = "true" > #< / a > 动态 trace< / h2 > < div class = "custom-container tip" > < p class = "custom-container-title" > 提示< / p > < p > 3.3.0 版本后支持。< / p > < / div > < p > 打开终端 1， < code > run< / code > 函数，可以看到打印出 < code > listenerId: 1< / code > ： < / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > < span class = "token punctuation" > [< / span > arthas@59161< span class = "token punctuation" > ]< / span > $ trace demo.MathGame run
Press Q or Ctrl+C to abort.
Affect< span class = "token punctuation" > (< / span > class count: < span class = "token number" > 1< / span > , method count: < span class = "token number" > 1< / span > < span class = "token punctuation" > )< / span > cost < span class = "token keyword" > in< / span > < span class = "token number" > 112< / span > ms, listenerId: < span class = "token number" > 1< / span >
< span class = "token variable" > < span class = "token variable" > `< / span > ---ts< span class = "token operator" > =< / span > < span class = "token number" > 2020< / span > -07-09 < span class = "token number" > 16< / span > :48:11< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > thread_name< / span > < span class = "token operator" > =< / span > main< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > id< / span > < span class = "token operator" > =< / span > < span class = "token number" > 1< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > is_daemon< / span > < span class = "token operator" > =< / span > false< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > priority< / span > < span class = "token operator" > =< / span > < span class = "token number" > 5< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > TCCL< / span > < span class = "token operator" > =< / span > sun.misc.Launcher$AppClassLoader@3d4eac69
< span class = "token variable" > `< / span > < / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 1< / span > .389634ms< span class = "token punctuation" > ]< / span > demo.MathGame:run< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
< span class = "token variable" > < span class = "token variable" > `< / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .123934ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #24 [throws Exception]< / span >
< span class = "token variable" > `< / span > < / span > ---ts< span class = "token operator" > =< / span > < span class = "token number" > 2020< / span > -07-09 < span class = "token number" > 16< / span > :48:12< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > thread_name< / span > < span class = "token operator" > =< / span > main< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > id< / span > < span class = "token operator" > =< / span > < span class = "token number" > 1< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > is_daemon< / span > < span class = "token operator" > =< / span > false< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > priority< / span > < span class = "token operator" > =< / span > < span class = "token number" > 5< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > TCCL< / span > < span class = "token operator" > =< / span > sun.misc.Launcher< span class = "token variable" > $AppClassLoader< / span > @3d4eac69
< span class = "token variable" > < span class = "token variable" > `< / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 3< / span > .716391ms< span class = "token punctuation" > ]< / span > demo.MathGame:run< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 3< / span > .182813ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #24< / span >
< span class = "token variable" > `< / span > < / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .167786ms< span class = "token punctuation" > ]< / span > demo.MathGame:print< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #25< / span >
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < / div > < / div > < p > 现在想要深入子函数< code > primeFactors< / code > ，可以打开一个新终端 2， < code > telnet localhost 3658< / code > 连接上 arthas， < code > primeFactors< / code > 时，指定< code > listenerId< / code > 。< / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > < span class = "token punctuation" > [< / span > arthas@59161< span class = "token punctuation" > ]< / span > $ trace demo.MathGame primeFactors < span class = "token parameter variable" > --listenerId< / span > < span class = "token number" > 1< / span >
Press Q or Ctrl+C to abort.
Affect< span class = "token punctuation" > (< / span > class count: < span class = "token number" > 1< / span > , method count: < span class = "token number" > 1< / span > < span class = "token punctuation" > )< / span > cost < span class = "token keyword" > in< / span > < span class = "token number" > 34< / span > ms, listenerId: < span class = "token number" > 1< / span >
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < / div > < / div > < p > 这时终端 2 打印的结果，说明已经增强了一个函数：< code > Affect(class count: 1 , method count: 1)< / code > ，但不再打印更多的结果。< / p > < p > 再查看终端 1， < code > primeFactors< / code > 函数里的内容：< / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > < span class = "token variable" > < span class = "token variable" > `< / span > ---ts< span class = "token operator" > =< / span > < span class = "token number" > 2020< / span > -07-09 < span class = "token number" > 16< / span > :49:29< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > thread_name< / span > < span class = "token operator" > =< / span > main< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > id< / span > < span class = "token operator" > =< / span > < span class = "token number" > 1< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > is_daemon< / span > < span class = "token operator" > =< / span > false< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > priority< / span > < span class = "token operator" > =< / span > < span class = "token number" > 5< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > TCCL< / span > < span class = "token operator" > =< / span > sun.misc.Launcher$AppClassLoader@3d4eac69
< span class = "token variable" > `< / span > < / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .492551ms< span class = "token punctuation" > ]< / span > demo.MathGame:run< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
< span class = "token variable" > < span class = "token variable" > `< / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .113929ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #24 [throws Exception]< / span >
< span class = "token variable" > `< / span > < / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .061462ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
< span class = "token variable" > < span class = "token variable" > `< / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .001018ms< span class = "token punctuation" > ]< / span > throw:java.lang.IllegalArgumentException< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #46< / span >
< span class = "token variable" > `< / span > < / span > ---ts< span class = "token operator" > =< / span > < span class = "token number" > 2020< / span > -07-09 < span class = "token number" > 16< / span > :49:30< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > thread_name< / span > < span class = "token operator" > =< / span > main< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > id< / span > < span class = "token operator" > =< / span > < span class = "token number" > 1< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > is_daemon< / span > < span class = "token operator" > =< / span > false< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > priority< / span > < span class = "token operator" > =< / span > < span class = "token number" > 5< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > TCCL< / span > < span class = "token operator" > =< / span > sun.misc.Launcher< span class = "token variable" > $AppClassLoader< / span > @3d4eac69
< span class = "token variable" > < span class = "token variable" > `< / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .409446ms< span class = "token punctuation" > ]< / span > demo.MathGame:run< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .232606ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #24< / span >
< span class = "token operator" > |< / span > < span class = "token variable" > `< / span > < / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .1294ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
`---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .084025ms< span class = "token punctuation" > ]< / span > demo.MathGame:print< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #25< / span >
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < / div > < / div > < p > 通过指定< code > listenerId< / code > 的方式动态 trace， < code > watch< / code > /< code > tt< / code > /< code > monitor< / code > 等命令也支持类似的功能。< / p > < h2 id = "trace-结果时间不准确问题" tabindex = "-1" > < a class = "header-anchor" href = "#trace-结果时间不准确问题" aria-hidden = "true" > #< / a > trace 结果时间不准确问题< / h2 > < p > 比如下面的结果里：< code > 0.705196 > (0.152743 + 0.145825)< / code > < / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ trace demo.MathGame run < span class = "token parameter variable" > -n< / span > < span class = "token number" > 1< / span >
Press Q or Ctrl+C to abort.
Affect< span class = "token punctuation" > (< / span > class count: < span class = "token number" > 1< / span > , method count: < span class = "token number" > 1< / span > < span class = "token punctuation" > )< / span > cost < span class = "token keyword" > in< / span > < span class = "token number" > 66< / span > ms, listenerId: < span class = "token number" > 1< / span >
< span class = "token variable" > < span class = "token variable" > `< / span > ---ts< span class = "token operator" > =< / span > < span class = "token number" > 2021< / span > -02-08 < span class = "token number" > 11< / span > :27:36< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > thread_name< / span > < span class = "token operator" > =< / span > main< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > id< / span > < span class = "token operator" > =< / span > < span class = "token number" > 1< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > is_daemon< / span > < span class = "token operator" > =< / span > false< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > priority< / span > < span class = "token operator" > =< / span > < span class = "token number" > 5< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > TCCL< / span > < span class = "token operator" > =< / span > sun.misc.Launcher$AppClassLoader@232204a1
< span class = "token variable" > `< / span > < / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .705196ms< span class = "token punctuation" > ]< / span > demo.MathGame:run< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .152743ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #24< / span >
`---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .145825ms< span class = "token punctuation" > ]< / span > demo.MathGame:print< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #25< / span >
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < div class = "line-number" > < / div > < / div > < / div > < p > 那么其它的时间消耗在哪些地方？< / p > < ol > < li > < p > 没有被 trace 到的函数。比如< code > java.*< / code > 下的函数调用默认会忽略掉。通过增加< code > --skipJDKMethod false< / code > 参数可以打印出来。< / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ trace demo.MathGame run < span class = "token parameter variable" > --skipJDKMethod< / span > < span class = "token boolean" > false< / span >
Press Q or Ctrl+C to abort.
Affect< span class = "token punctuation" > (< / span > class count: < span class = "token number" > 1< / span > , method count: < span class = "token number" > 1< / span > < span class = "token punctuation" > )< / span > cost < span class = "token keyword" > in< / span > < span class = "token number" > 35< / span > ms, listenerId: < span class = "token number" > 2< / span >
< span class = "token variable" > < span class = "token variable" > `< / span > ---ts< span class = "token operator" > =< / span > < span class = "token number" > 2021< / span > -02-08 < span class = "token number" > 11< / span > :27:48< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > thread_name< / span > < span class = "token operator" > =< / span > main< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > id< / span > < span class = "token operator" > =< / span > < span class = "token number" > 1< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > is_daemon< / span > < span class = "token operator" > =< / span > false< span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > priority< / span > < span class = "token operator" > =< / span > < span class = "token number" > 5< / span > < span class = "token punctuation" > ;< / span > < span class = "token assign-left variable" > TCCL< / span > < span class = "token operator" > =< / span > sun.misc.Launcher$AppClassLoader@232204a1
< span class = "token variable" > `< / span > < / span > ---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .810591ms< span class = "token punctuation" > ]< / span > demo.MathGame:run< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .034568ms< span class = "token punctuation" > ]< / span > java.util.Random:nextInt< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #23< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .119367ms< span class = "token punctuation" > ]< / span > demo.MathGame:primeFactors< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #24 [throws Exception]< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .017407ms< span class = "token punctuation" > ]< / span > java.lang.StringBuilder:< span class = "token operator" > < < / span > init< span class = "token operator" > > < / span > < span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #28< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .127922ms< span class = "token punctuation" > ]< / span > java.lang.String:format< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #57< / span >
+---< span class = "token punctuation" > [< / span > min< span class = "token operator" > =< / span > < span class = "token number" > 0< / span > .01419ms,max< span class = "token operator" > =< / span > < span class = "token number" > 0< / span > .020221ms,total< span class = "token operator" > =< / span > < span class = "token number" > 0< / span > .034411ms,count< span class = "token operator" > =< / span > < span class = "token number" > 2< / span > < span class = "token punctuation" > ]< / span > java.lang.StringBuilder:append< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #57< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .021911ms< span class = "token punctuation" > ]< / span > java.lang.Exception:getMessage< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #57< / span >
+---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .015643ms< span class = "token punctuation" > ]< / span > java.lang.StringBuilder:toString< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #57< / span >
`---< span class = "token punctuation" > [< / span > < span class = "token number" > 0< / span > .086622ms< span class = "token punctuation" > ]< / span > java.io.PrintStream:println< span class = "token punctuation" > (< / span > < span class = "token punctuation" > )< / span > < span class = "token comment" > #57< / span >
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