From: Saravana Kannan <skannan@codeaurora.org>
To: Saravana Kannan <skannan@codeaurora.org>
Cc: mark.rutland@arm.com, Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
avilaj@codeaurora.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 2/2] perf/core: Add support for PMUs that can be read from any CPU
Date: Fri, 23 Feb 2018 16:56:37 -0800 [thread overview]
Message-ID: <5A90B845.3030504@codeaurora.org> (raw)
In-Reply-To: <1519431578-11995-2-git-send-email-skannan@codeaurora.org>
On 02/23/2018 04:19 PM, Saravana Kannan wrote:
> Some PMUs events can be read from any CPU. So allow the PMU to mark
> events as such. For these events, we don't need to reject reads or
> make smp calls to the event's CPU and cause unnecessary wake ups.
>
> Good examples of such events would be events from caches shared across
> all CPUs.
>
> Signed-off-by: Saravana Kannan <skannan@codeaurora.org>
> ---
> include/linux/perf_event.h | 3 +++
> kernel/events/core.c | 10 ++++++++--
> 2 files changed, 11 insertions(+), 2 deletions(-)
>
>
Ugh! Didn't mean to chain these two emails. This one is independent of
the other email.
-Saravana
--
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
next prev parent reply other threads:[~2018-02-24 0:56 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-24 0:19 [PATCH v1 1/2] perf/core: Add API to look up PMU type by name Saravana Kannan
2018-02-24 0:19 ` [PATCH v1 2/2] perf/core: Add support for PMUs that can be read from any CPU Saravana Kannan
2018-02-24 0:56 ` Saravana Kannan [this message]
2018-02-24 8:41 ` Peter Zijlstra
2018-02-27 1:53 ` skannan
2018-02-27 11:52 ` Mark Rutland
2018-03-03 15:41 ` Peter Zijlstra
2018-03-07 16:39 ` Jeremy Linton
2018-02-25 14:38 ` Mark Rutland
2018-02-27 2:11 ` skannan
2018-02-27 11:43 ` Mark Rutland
2018-02-27 23:15 ` skannan
2018-02-24 8:08 ` [PATCH v1 1/2] perf/core: Add API to look up PMU type by name Peter Zijlstra
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