From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Song Liu <song@kernel.org>
Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com,
acme@redhat.com, namhyung@kernel.org, jolsa@kernel.org,
songliubraving@fb.com
Subject: Re: [PATCH v5 5/5] perf-stat: introduce bpf_counter_ops->disable()
Date: Tue, 27 Apr 2021 16:42:02 -0300 [thread overview]
Message-ID: <YIhpCuTPWPwURiQh@kernel.org> (raw)
In-Reply-To: <YIhlmhyBPxTOZRZa@kernel.org>
Em Tue, Apr 27, 2021 at 04:27:22PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Sun, Apr 25, 2021 at 02:43:33PM -0700, Song Liu escreveu:
> > Introduce bpf_counter_ops->disable(), which is used stop counting the
> > event.
>
> [acme@five perf]$ perf test -v python
> Couldn't bump rlimit(MEMLOCK), failures may take place when creating BPF maps, etc
> 19: 'import perf' in python :
> --- start ---
> test child forked, pid 1497924
> python usage test: "echo "import sys ; sys.path.append('/tmp/build/perf/python'); import perf" | '/usr/bin/python3' "
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> ImportError: /tmp/build/perf/python/perf.cpython-39-x86_64-linux-gnu.so: undefined symbol: bpf_counter__disable
> test child finished with -1
> ---- end ----
> 'import perf' in python: FAILED!
> [acme@five perf]$
>
> I'll fix this up in my local tree, if you need to respin, please pick
> patches from tmp.perf/core, will refresh it later today.
Added this:
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 278abecb5bdfc0d2..27940edb161c2d8c 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -100,6 +100,11 @@ int bpf_counter__install_pe(struct evsel *evsel __maybe_unused, int cpu __maybe_
return 0;
}
+int bpf_counter__disable(struct evsel *evsel __maybe_unused)
+{
+ return 0;
+}
+
/*
* Support debug printing even though util/debug.c is not linked. That means
* implementing 'verbose' and 'eprintf'.
prev parent reply other threads:[~2021-04-27 19:42 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-25 21:43 [PATCH v5 0/5] perf util: bpf perf improvements Song Liu
2021-04-25 21:43 ` [PATCH v5 1/5] perf util: move bpf_perf definitions to a libperf header Song Liu
2021-04-25 21:43 ` [PATCH v5 2/5] perf bpf: check perf_attr_map is compatible with the perf binary Song Liu
2021-04-25 21:43 ` [PATCH v5 3/5] perf-stat: introduce config stat.bpf-counter-events Song Liu
2021-04-25 21:43 ` [PATCH v5 4/5] perf-stat: introduce ':b' modifier Song Liu
2021-04-25 21:43 ` [PATCH v5 5/5] perf-stat: introduce bpf_counter_ops->disable() Song Liu
2021-04-26 21:27 ` Jiri Olsa
2021-04-26 22:18 ` Song Liu
2021-04-27 12:33 ` Jiri Olsa
2021-04-27 19:30 ` Song Liu
2021-04-29 22:40 ` Song Liu
2021-05-03 14:09 ` Jiri Olsa
2021-05-03 15:25 ` Arnaldo Carvalho de Melo
2021-04-27 19:27 ` Arnaldo Carvalho de Melo
2021-04-27 19:42 ` Arnaldo Carvalho de Melo [this message]
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