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Add example user profile btrace script.

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This commit is contained in:
claudio 2023-05-12 14:34:00 +00:00
parent 5e6104a1cc
commit 9dd2df6aa8
2 changed files with 19 additions and 2 deletions
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4
share/btrace/Makefile
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@ -1,6 +1,6 @@
# $OpenBSD: Makefile,v 1.1 2021/10/23 19:37:35 mpi Exp $
# $OpenBSD: Makefile,v 1.2 2023/05/12 14:34:00 claudio Exp $
FILES= kprofile.bt runqlat.bt
FILES= kprofile.bt runqlat.bt uprofile.bt
NOOBJ= noobj
install:

17
share/btrace/uprofile.bt Normal file
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/* $OpenBSD: uprofile.bt,v 1.1 2023/05/12 14:34:00 claudio Exp $ */
/*
* uprofile.bt Userland profiling (stack sampling) at 100Hz.
*
* To produce a FlameGraph process the output with stackcollapse-bpftrace.pl
* and flamegraph.pl found in:
* https://github.com/brendangregg/FlameGraph
*
* The PID of the to be monitored process is the first optional argument to
* btrace(8).
* This only works for a single static binary where everything was compiled
* with -fno-omit-frame-pointer.
*/
profile:hz:100 / pid == $1 / {
@[ustack] = count();
}