Messages in this thread | | | Date | Wed, 12 Jan 2022 09:49:45 +0300 | From | Nikita Shubin <> | Subject | Re: [RFC PATCH 0/1] perf tools: Add 'm' event modifier for counting |
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On Tue, 11 Jan 2022 14:29:15 +0000 Jessica Clarke <jrtc27@jrtc27.com> wrote:
Hello Jessica!
> On 11 Jan 2022, at 14:20, Nikita Shubin <nikita.shubin@maquefel.me> > wrote: > > > > From: Nikita Shubin <n.shubin@yadro.com> > > > > This patch is a proposal to add Machine Mode modifier that is > > currently available only for RISC-V for perf tool. > > > > We don't currently have a level that is lower than kernel, so i > > don't see we can reuse something existing for this purpose. > > > > The exclude_machine bit seems harmless to as no one will proccess > > it apart of riscv. > > Armv8 has equivalent bits in PMEVTYPER<n>_EL0 and PMCCFILTR_EL0 for > EL-based filtering, which includes filtering EL3. >
Thank your for your tip, i ll study it and see if this is a good way to go.
> Jess > > > Patch depends on Atish Patra PMU series: > > https://lwn.net/Articles/879905/ > > + some modifications to pass execlude event to SBI PMU extension > > > > Tested with qemu. > > > > Nikita Shubin (1): > > perf tools: Add 'm' event modifier for counting machine > > > > include/uapi/linux/perf_event.h | 3 ++- > > tools/include/uapi/linux/perf_event.h | 3 ++- > > tools/perf/Documentation/perf-list.txt | 1 + > > tools/perf/tests/parse-events.c | 18 ++++++++++++++++++ > > tools/perf/util/evsel.c | 4 +++- > > tools/perf/util/parse-events.c | 18 +++++++++++++----- > > tools/perf/util/parse-events.l | 2 +- > > 7 files changed, 40 insertions(+), 9 deletions(-) > > > > -- > > 2.31.1 > > > > > > _______________________________________________ > > linux-riscv mailing list > > linux-riscv@lists.infradead.org > > http://lists.infradead.org/mailman/listinfo/linux-riscv >
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