From: Peter Zijlstra <peterz@infradead.org>
To: Mark Rutland <mark.rutland@arm.com>
Cc: Kyle Huey <me@kylehuey.com>,
Vince Weaver <vincent.weaver@maine.edu>,
"Jin, Yao" <yao.jin@linux.intel.com>,
Ingo Molnar <mingo@kernel.org>,
stable@vger.kernel.org,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Jiri Olsa <jolsa@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Namhyung Kim <namhyung@kernel.org>,
Stephane Eranian <eranian@google.com>,
Thomas Gleixner <tglx@linutronix.de>,
acme@kernel.org, jolsa@kernel.org, kan.liang@intel.com,
Will Deacon <will.deacon@arm.com>,
gregkh@linuxfoundation.org,
"Robert O'Callahan" <robert@ocallahan.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] perf/core: generate overflow signal when samples are dropped (WAS: Re: [REGRESSION] perf/core: PMU interrupts dropped if we entered the kernel in the "skid" region)
Date: Tue, 4 Jul 2017 11:46:02 +0200 [thread overview]
Message-ID: <20170704094602.dgrdwydui3wimf2s@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20170704093345.GB19649@leverpostej>
On Tue, Jul 04, 2017 at 10:33:45AM +0100, Mark Rutland wrote:
> > That said, with a per-cpu event the TID sample value is indeed subject
> > to skid like you describe.
>
> For per-cpu events, does that matter? Those don't have TID filters in
> the first place, no?
eBPF can do all sorts I suppose.
But yes, at some point you just have to give up, there's only so much
one can do.
next prev parent reply other threads:[~2017-07-04 9:46 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAP045Ap8cMx6mzSgcQ3n3bnh_8GJuCp7_KZe_5ZTCR_K6cPTLw@mail.gmail.com>
2017-06-28 1:01 ` [REGRESSION] perf/core: PMU interrupts dropped if we entered the kernel in the "skid" region Kyle Huey
2017-06-28 2:09 ` Jin, Yao
2017-06-28 4:51 ` Kyle Huey
2017-06-28 5:35 ` Jin, Yao
2017-06-28 7:30 ` Kyle Huey
2017-06-28 10:12 ` Mark Rutland
2017-06-28 10:56 ` [PATCH] perf/core: generate overflow signal when samples are dropped (WAS: Re: [REGRESSION] perf/core: PMU interrupts dropped if we entered the kernel in the "skid" region) Mark Rutland
2017-06-28 12:40 ` Vince Weaver
2017-06-28 13:07 ` Mark Rutland
2017-06-29 8:13 ` Alexey Budankov
2017-06-29 8:25 ` Alexey Budankov
2017-06-28 16:48 ` Kyle Huey
2017-06-28 17:49 ` Mark Rutland
2017-06-28 22:55 ` Kyle Huey
2017-06-29 0:27 ` Jin, Yao
2017-06-30 17:44 ` Kyle Huey
2017-07-04 9:03 ` Peter Zijlstra
2017-07-04 9:33 ` Mark Rutland
2017-07-04 9:46 ` Peter Zijlstra [this message]
2017-07-04 10:21 ` Mark Rutland
2017-07-06 5:07 ` Robert O'Callahan
2017-07-11 2:03 ` Kyle Huey
2017-07-11 9:03 ` Ingo Molnar
2017-07-11 13:07 ` Jin, Yao
2017-07-12 7:57 ` Ingo Molnar
2017-07-11 14:26 ` Mark Rutland
2017-07-11 15:32 ` Kyle Huey
2017-07-18 0:07 ` Kyle Huey
2017-06-29 8:12 ` Ingo Molnar
2017-07-04 9:06 ` Peter Zijlstra
2017-07-04 10:04 ` Ingo Molnar
2017-07-11 9:03 ` [tip:perf/urgent] Revert "perf/core: Drop kernel samples even though :u is specified" tip-bot for Ingo Molnar
2017-06-28 16:46 ` [REGRESSION] perf/core: PMU interrupts dropped if we entered the kernel in the "skid" region Kyle Huey
2017-06-28 17:19 ` Mark Rutland
2017-06-28 17:36 ` Kyle Huey
2017-06-28 17:52 ` Mark Rutland
2017-06-28 17:48 ` Robert O'Callahan
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