On 26/10/15 14:39, Wangnan (F) wrote: > > > On 2015/10/26 20:24, Adrian Hunter wrote: >> On 26/10/15 13:41, Wang Nan wrote: >>> evsel->system_wide is introduced by commit bf8e8f4b832972c76d64ab2e2837 >>> (perf evlist: Add 'system_wide' option), which is used for mixing evsels >>> that aren't system-wide with ones that are [1]. However, for global >>> system wide recording (perf record -a ...), evsel->system_wide is set >>> to false, which is confusion. >>> >>> This patch set evsel->system_wide to true if the target.system_wide is >>> set, which makes evsel->system_wide a reliable way to describe whether >>> itself is system_wide or not. >>> >>> [1] http://lkml.kernel.org/r/562df19b.2080...@intel.com >>> >>> Signed-off-by: Wang Nan <wangn...@huawei.com> >>> Cc: Adrian Hunter <adrian.hun...@intel.com> >>> Cc: Arnaldo Carvalho de Melo <a...@redhat.com> >>> Cc: Alexei Starovoitov <a...@plumgrid.com> >>> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> >>> Cc: Li Zefan <lize...@huawei.com> >>> Cc: pi3or...@163.com >>> Link: http://lkml.kernel.org/n/ebpf-qm3gtwidc1o5ktjd9tgje...@git.kernel.org >>> --- >>> tools/perf/util/evsel.c | 1 + >>> 1 file changed, 1 insertion(+) >>> >>> diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c >>> index 3ac4ee9c..36ecf0e 100644 >>> --- a/tools/perf/util/evsel.c >>> +++ b/tools/perf/util/evsel.c >>> @@ -734,6 +734,7 @@ void perf_evsel__config(struct perf_evsel *evsel, >>> struct record_opts *opts) >>> int track = evsel->tracking; >>> bool per_cpu = opts->target.default_per_cpu && >>> !opts->target.per_thread; >>> + evsel->system_wide = opts->target.system_wide; >> Well that breaks the way evsel->system_wide is used i.e. it is a parameter >> to the evsel and here you just overwrote it. > > Currently the only user of evsel->system_wide is IPT: > > auxtrace_record__options -> intel_pt_recording_options > > and it only set it to true. > > So I think changing to this should make it safe: > > evsel->system_wide = (evsel->system_wide || opt->target.system_wide); > > Thought?
That would work although it looks like a kludge. Have you looked at properly validating opts->no_inherit ? Also, aren't you neglecting target->cpu_list ? > > If we want to add further config terms we can put it to apply_config_terms(), > where we can implement something like: > > # perf record -e cycles/system-wide/ -e instruction/no-system-wide/ ... > > But currently I don't have such requirement. > > Thank you. > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
