Messages in this thread | | | Date | Fri, 2 Sep 2022 16:17:43 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: perf top -p broken for multithreaded processes since 5.19 |
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Em Fri, Sep 02, 2022 at 05:50:22PM +0300, Adrian Hunter escreveu: > On 2/09/22 17:46, Tomáš Trnka wrote: > > Hello, > > > > A bug in perf v5.19 and newer completely breaks monitoring multithreaded > > processes using "perf top -p". The tool fails to start with "Failed to mmap > > with 22 (Invalid argument)". It still seems to work fine on single-threaded > > processes. "perf record" is also unaffected. > > It has been reported here: > > https://bugzilla.kernel.org/show_bug.cgi?id=216441
If I do:
⬢[acme@toolbox perf-urgent]$ git log -2 commit dfeb0bc60782471c293938e71b1a1117cfac2cb3 (HEAD -> perf/urgent) Author: Arnaldo Carvalho de Melo <acme@redhat.com> Date: Fri Sep 2 16:15:39 2022 -0300
Revert "libperf evlist: Check nr_mmaps is correct"
This reverts commit 4ce47d842d4c16c07b135b8a7975b8f0672bcc0e.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
commit 78cd283f6b8ab701cb35eafd5af8140560a88f16 Author: Arnaldo Carvalho de Melo <acme@redhat.com> Date: Fri Sep 2 16:13:41 2022 -0300
Revert "libperf evlist: Allow mixing per-thread and per-cpu mmaps"
This reverts commit ae4f8ae16a07896403c90305d4b9be27f657c1fc.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> ⬢[acme@toolbox perf-urgent]$
It works again, Tomáš can you please try doing this to see if this works for you?
- Arnaldo
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