From: Mansour Alharthi <malharthi9@gatech.edu>
To: "peterz@infradead.org" <peterz@infradead.org>,
"mingo@redhat.com" <mingo@redhat.com>,
"acme@kernel.org" <acme@kernel.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: tracing child threads with address filtering using intel_pt
Date: Wed, 3 Oct 2018 00:23:33 +0000 [thread overview]
Message-ID: <8fc78808-db61-2f41-180a-9713178e22f6@gatech.edu> (raw)
Hello all,
I am having trouble tracing child threads when using address filtering
with intel_pt ..
Assume this test code:
thread_start(){
...
test();
...
}
test(){
printf("test");
}
main(){
...
pthread_create(......, thread_start,....);
}
Tracing the above program with the following command:
perf record -v -m 512,10000 -e intel_pt//u -T --switch-events --filter
'filter * @ ./test' -- ./test
Returns zero trace for code executed by child thread, i.e.
thread_start() and test() functions..
While tracing without the filter does include the threads trace:
perf record -v -m 512,10000 -e intel_pt//u -T --switch-events -- ./test
Is this intended? or is it a bug?
Thanks!
Mansour.
next reply other threads:[~2018-10-03 0:23 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-03 0:23 Mansour Alharthi [this message]
[not found] ` <5267CD8C-A8B1-416E-BCCD-5DD87DCA4FB1@gatech.edu>
2018-10-08 11:52 ` tracing child threads with address filtering using intel_pt in perf Alexander Shishkin
2018-10-08 14:25 ` Alexander Shishkin
2018-10-09 6:31 ` Mansour Alharthi
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