From: Ingo Molnar <mingo@elte.hu>
To: "Peter Zijlstra" <a.p.zijlstra@chello.nl>,
"Frédéric Weisbecker" <fweisbec@gmail.com>,
"Steven Rostedt" <rostedt@goodmis.org>
Cc: paulus@samba.org, tglx@linutronix.de, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 00/11] generic software counters -v2
Date: Fri, 13 Mar 2009 14:07:30 +0100 [thread overview]
Message-ID: <20090313130730.GA10117@elte.hu> (raw)
In-Reply-To: <20090313112125.886730125@chello.nl>
* Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> This patch set improves the current software counters by
> providing sampling events for most of them.
>
> The clock based software counters use hrtimers to generate
> events, allowing sample based profiling without hardware
> support -- obviously this has limited functionality for kernal
> based profiling since we disable interrupts quite frequently,
> but should be good for userspace.
>
> Other events like pagefaults insert simple hooks into the
> actual pagefault code to generate these events.
Very nice series! Applied to tip:core/locking and
tip:perfcounters/core - thanks Peter!
Fixed a trivial !PERF_COUNTERS build failure as well.
> Future work (in-progress) will hook into the tracepoint
> infrastructure to to provide profiling events.
Cool!
Especially for pagefaults we have a number of callbacks there:
kmmio, kprobes, kmemcheck, tracing, perfcounters - they could
indeed all be consolidated step by step onto a tracepoint.
Ingo
prev parent reply other threads:[~2009-03-13 13:08 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-13 11:21 [PATCH 00/11] generic software counters -v2 Peter Zijlstra
2009-03-13 11:21 ` [PATCH 01/11] sched: remove extra call overhead for schedule() Peter Zijlstra
2009-03-13 13:00 ` [tip:core/locking] " Peter Zijlstra
2009-04-20 19:00 ` [tip:sched/core] " tip-bot for Peter Zijlstra
2009-03-13 11:21 ` [PATCH 02/11] hrtimer: fix rq->lock inversion (again) Peter Zijlstra
2009-03-13 13:00 ` [tip:core/locking] " Peter Zijlstra
2009-03-13 13:27 ` Peter Zijlstra
2009-03-13 14:57 ` Peter Zijlstra
2009-03-31 12:57 ` Peter Zijlstra
2009-04-02 19:45 ` [tip:timers/urgent] " Peter Zijlstra
2009-03-13 11:21 ` [PATCH 03/11] perf_counter: x86: fix 32bit irq_period assumption Peter Zijlstra
2009-03-13 13:00 ` [tip:perfcounters/core] perf_counter: x86: fix 32-bit " Peter Zijlstra
2009-03-13 13:06 ` Peter Zijlstra
2009-03-13 11:21 ` [PATCH 04/11] perf_counter: use list_move_tail Peter Zijlstra
2009-03-13 13:00 ` [tip:perfcounters/core] perf_counter: use list_move_tail() Peter Zijlstra
2009-03-13 13:06 ` Peter Zijlstra
2009-03-13 11:21 ` [PATCH 05/11] perf_counter: add comment to barrier Peter Zijlstra
2009-03-13 13:01 ` [tip:perfcounters/core] " Peter Zijlstra
2009-03-13 13:06 ` Peter Zijlstra
2009-03-13 11:21 ` [PATCH 06/11] perf_counter: x86: use ULL postfix for 64bit constants Peter Zijlstra
2009-03-13 13:01 ` [tip:perfcounters/core] " Peter Zijlstra
2009-03-13 13:06 ` Peter Zijlstra
2009-03-13 11:21 ` [PATCH 07/11] perf_counter: software counter event infrastructure Peter Zijlstra
2009-03-13 13:01 ` [tip:perfcounters/core] " Peter Zijlstra
2009-03-13 13:07 ` Peter Zijlstra
2009-03-13 11:21 ` [PATCH 08/11] perf_counter: provide pagefault software events Peter Zijlstra
2009-03-13 13:01 ` [tip:perfcounters/core] " Peter Zijlstra
2009-03-13 13:07 ` Peter Zijlstra
2009-03-13 11:21 ` [PATCH 09/11] perf_counter: provide major/minor page fault " Peter Zijlstra
2009-03-13 13:01 ` [tip:perfcounters/core] " Peter Zijlstra
2009-03-13 13:07 ` Peter Zijlstra
2009-03-13 11:21 ` [PATCH 10/11] perf_counter: hrtimer based sampling for software time events Peter Zijlstra
2009-03-13 13:01 ` [tip:perfcounters/core] " Peter Zijlstra
2009-03-13 13:07 ` Peter Zijlstra
2009-03-13 15:43 ` [PATCH 10.5/11] perf_counter: fix hrtimer sampling Peter Zijlstra
2009-03-13 16:09 ` [tip:perfcounters/core] " Peter Zijlstra
2009-03-13 11:21 ` [PATCH 11/11] perf_counter: add an event_list Peter Zijlstra
2009-03-13 13:02 ` [tip:perfcounters/core] " Peter Zijlstra
2009-03-13 13:07 ` Peter Zijlstra
2009-03-13 13:07 ` Ingo Molnar [this message]
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