Re: [PATCH v2 2/5] perf record: Prevent override of attr->sample_period for libpfm4 events

Em Fri, Sep 04, 2020 at 03:48:03PM -0300, Arnaldo Carvalho de Melo escreveu:

Em Fri, Sep 04, 2020 at 09:22:10AM -0700, Ian Rogers escreveu:

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On Fri, Sep 4, 2020 at 9:03 AM Jiri Olsa [off-list ref] wrote:

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On Thu, Sep 03, 2020 at 10:41:14PM -0700, Ian Rogers wrote:

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On Wed, Jul 29, 2020 at 4:24 PM Ian Rogers [off-list ref] wrote:

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On Tue, Jul 28, 2020 at 9:10 AM Jiri Olsa [off-list ref] wrote:

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On Tue, Jul 28, 2020 at 05:59:46PM +0200, Jiri Olsa wrote:

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On Tue, Jul 28, 2020 at 01:57:31AM -0700, Ian Rogers wrote:

[jolsa@krava perf]$ sudo ./perf test 17 -v
17: Setup struct perf_event_attr                          :

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running './tests/attr/test-record-C0'
expected sample_period=4000, got 3000
FAILED './tests/attr/test-record-C0' - match failure

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I'm not able to reproduce this. Do you have a build configuration or
something else to look at? The test doesn't seem obviously connected
with this patch.

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Jiri, any update? Thanks,

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sorry, I rebased and ran it again and it passes for me now,
so it got fixed along the way

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No worries, thanks for the update! It'd be nice to land this and the
other libpfm fixes.

I applied it and it generated this regression:

FAILED '/home/acme/libexec/perf-core/tests/attr/test-record-pfm-period' - match failure

I'll look at the other patches that are pending in this regard to see
what needs to be squashed so that we don't break bisect.

So, more context:

running '/home/acme/libexec/perf-core/tests/attr/test-record-pfm-period'
expected exclude_hv=0, got 1
FAILED '/home/acme/libexec/perf-core/tests/attr/test-record-pfm-period' - match failure
test child finished with -1
---- end ----
Setup struct perf_event_attr: FAILED!
[root@five ~]#

Ian, can you take a look at this?

- Arnaldo