From: Leo Yan <leo.yan@arm.com>
To: lirongqing <lirongqing@baidu.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@kernel.org>, Ian Rogers <irogers@google.com>,
Adrian Hunter <adrian.hunter@intel.com>,
James Clark <james.clark@linaro.org>,
Sergey Senozhatsky <senozhatsky@chromium.org>,
Leo Yan <leo.yan@linux.dev>,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] perf kvm: Fix arm64 VM-exit duration accounting
Date: Wed, 4 Nov 2026 11:17:51 +0000 [thread overview]
Message-ID: <20261104111751.GG9176@e132581.arm.com> (raw)
In-Reply-To: <20261031120123.2312-1-lirongqing@baidu.com>
On Sat, Oct 31, 2026 at 08:01:23PM +0800, lirongqing wrote:
> From: Li RongQing <lirongqing@baidu.com>
>
> Use kvm_exit as the start event and the following kvm_entry as the
> end event for arm64 VM-exit statistics. Keep decoding ret and esr_ec
> from the exit sample.
>
> Before this change, arm64 measured guest runtime as VM-exit time.
>
> Fixes: 1218838d68f5 ("perf kvm: Add kvm-stat for arm64")
> Signed-off-by: Li RongQing <lirongqing@baidu.com>
Thanks for the fix!
Reviewed-by: Leo Yan <leo.yan@arm.com>
Since arm64 requires the exit reason, we cannot directly use the common
exit_event_begin()/exit_event_end() callbacks as other archs do.
next prev parent reply other threads:[~2026-11-04 11:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-31 12:01 lirongqing
2026-11-04 11:17 ` Leo Yan [this message]
2026-11-04 21:19 ` Arnaldo Carvalho de Melo
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