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| author | Frank Ch. Eigler <fche@elastic.org> | 2010-03-19 14:58:16 -0400 |
|---|---|---|
| committer | Frank Ch. Eigler <fche@elastic.org> | 2010-03-19 14:58:16 -0400 |
| commit | acd96f2fcdeaf29554e58d428626ca864590d2b4 (patch) | |
| tree | 76f6fe1e8d433dca5e34863d9f4a6181b25da57d /testsuite | |
| parent | 8890a74f7c6b71b0346f7fca8ce43674f706d247 (diff) | |
| download | systemtap-steved-acd96f2fcdeaf29554e58d428626ca864590d2b4.tar.gz systemtap-steved-acd96f2fcdeaf29554e58d428626ca864590d2b4.tar.xz systemtap-steved-acd96f2fcdeaf29554e58d428626ca864590d2b4.zip | |
PR909: add a baby test case
* testsuite/systemtap.examples/profiling/thread-times.stp: Prefer
perf.sw.cpu_clock to timer.profile. Prettify output by including
comm string.
Diffstat (limited to 'testsuite')
| -rw-r--r-- | testsuite/systemtap.examples/profiling/thread-times.meta | 9 | ||||
| -rwxr-xr-x | testsuite/systemtap.examples/profiling/thread-times.stp | 26 |
2 files changed, 15 insertions, 20 deletions
diff --git a/testsuite/systemtap.examples/profiling/thread-times.meta b/testsuite/systemtap.examples/profiling/thread-times.meta index 3cb3e93d..b7d37b1a 100644 --- a/testsuite/systemtap.examples/profiling/thread-times.meta +++ b/testsuite/systemtap.examples/profiling/thread-times.meta @@ -1,13 +1,6 @@ title: Profile kernel functions name: thread-times.stp -version: 1.0 -author: anonymous keywords: profiling -subsystem: kernel -status: production -exit: user-controlled -output: sorted-list -scope: system-wide -description: The thread-times.stp script sets up time-based sampling. Every five seconds it prints out a sorted list with the top twenty processes with samples broken down into percentage total time spent in user-space and kernel-space. +description: The thread-times.stp script sets up time-based sampling. Every five seconds it prints out a sorted list with the top twenty threads occupying the CPUs, broken down as a percentage of user and kernel time. test_check: stap -p4 thread-times.stp test_installcheck: stap thread-times.stp -c "sleep 0.2" diff --git a/testsuite/systemtap.examples/profiling/thread-times.stp b/testsuite/systemtap.examples/profiling/thread-times.stp index cbe4118e..a75ffc5a 100755 --- a/testsuite/systemtap.examples/profiling/thread-times.stp +++ b/testsuite/systemtap.examples/profiling/thread-times.stp @@ -1,13 +1,15 @@ #! /usr/bin/stap -probe timer.profile { - tid=tid() +probe perf.sw.cpu_clock!, timer.profile { + // NB: To avoid contention on SMP machines, no global scalars/arrays used, + // only contention-free statistics aggregates. + tid=tid(); e=execname() if (!user_mode()) - kticks[tid] <<< 1 + kticks[e,tid] <<< 1 else - uticks[tid] <<< 1 + uticks[e,tid] <<< 1 ticks <<< 1 - tids[tid] <<< 1 + tids[e,tid] <<< 1 } global uticks, kticks, ticks @@ -16,13 +18,13 @@ global tids probe timer.s(5), end { allticks = @count(ticks) - printf ("%5s %7s %7s (of %d ticks)\n", - "tid", "%user", "%kernel", allticks) - foreach (tid in tids- limit 20) { - uscaled = @count(uticks[tid])*10000/allticks - kscaled = @count(kticks[tid])*10000/allticks - printf ("%5d %3d.%02d%% %3d.%02d%%\n", - tid, uscaled/100, uscaled%100, kscaled/100, kscaled%100) + printf ("%16s %5s %7s %7s (of %d ticks)\n", + "comm", "tid", "%user", "%kernel", allticks) + foreach ([e,tid] in tids- limit 20) { + uscaled = @count(uticks[e,tid])*10000/allticks + kscaled = @count(kticks[e,tid])*10000/allticks + printf ("%16s %5d %3d.%02d%% %3d.%02d%%\n", + e, tid, uscaled/100, uscaled%100, kscaled/100, kscaled%100) } printf("\n") |