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From: Namhyung Kim <namhyung@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>, 
 Ian Rogers <irogers@google.com>, 
 Athira Rajeev <atrajeev@linux.vnet.ibm.com>, 
 Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>, 
 Mark Rutland <mark.rutland@arm.com>, 
 Alexander Shishkin <alexander.shishkin@linux.intel.com>, 
 Jiri Olsa <jolsa@kernel.org>, Adrian Hunter <adrian.hunter@intel.com>, 
 Kan Liang <kan.liang@linux.intel.com>, acme@redhat.com, 
 Tim Chen <tim.c.chen@linux.intel.com>, 
 linux-perf-users <linux-perf-users@vger.kernel.org>, 
 LKML <linux-kernel@vger.kernel.org>, 
 Madadi Vineeth Reddy <vineethr@linux.ibm.com>
In-Reply-To: <20241004170756.18064-1-vineethr@linux.ibm.com>
References: <20241004170756.18064-1-vineethr@linux.ibm.com>
Subject: Re: [PATCH v6] perf sched timehist: Add pre-migration wait time
 option
Message-Id: <172909876202.288721.13527604855301602409.b4-ty@kernel.org>
Date: Wed, 16 Oct 2024 10:12:42 -0700
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On Fri, 04 Oct 2024 22:37:56 +0530, Madadi Vineeth Reddy wrote:

> pre-migration wait time is the time that a task unnecessarily spends
> on the runqueue of a CPU but doesn't get switched-in there. In terms
> of tracepoints, it is the time between sched:sched_wakeup and
> sched:sched_migrate_task.
> 
> Let's say a task woke up on CPU2, then it got migrated to CPU4 and
> then it's switched-in to CPU4. So, here pre-migration wait time is
> time that it was waiting on runqueue of CPU2 after it is woken up.
> 
> [...]

Applied to perf-tools-next, thanks!

Best regards,
Namhyung