From: Frederic Weisbecker <fweisbec@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>, LKML <linux-kernel@vger.kernel.org>,
Li Zefan <lizf@cn.fujitsu.com>,
Prasad <prasad@linux.vnet.ibm.com>,
Alan Stern <stern@rowland.harvard.edu>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Steven Rostedt <rostedt@goodmis.org>,
Jan Kiszka <jan.kiszka@web.de>, Jiri Slaby <jirislaby@gmail.com>,
Avi Kivity <avi@redhat.com>, Paul Mackerras <paulus@samba.org>,
Mike Galbraith <efault@gmx.de>,
Masami Hiramatsu <mhiramat@redhat.com>,
Paul Mundt <lethal@linux-sh.org>,
Arjan van de Ven <arjan@linux.intel.com>
Subject: Re: [PATCH 3/7 v6] perf/core: Add a callback to perf events
Date: Wed, 18 Nov 2009 01:18:19 +0100 [thread overview]
Message-ID: <20091118001815.GA8187@nowhere> (raw)
In-Reply-To: <1258457333.7816.186.camel@laptop>
On Tue, Nov 17, 2009 at 12:28:53PM +0100, Peter Zijlstra wrote:
> On Sun, 2009-11-08 at 16:28 +0100, Frederic Weisbecker wrote:
> > A simple callback in a perf event can be used for multiple purposes.
> > For example it is useful for triggered based events like hardware
> > breakpoints that need a callback to dispatch a triggered breakpoint
> > event.
> >
> > v2: Simplify a bit the callback attribution as suggested by Paul
> > Mackerras
>
> Yuck! So we add an opaque callback without semantics nor usage.
Yeah, this is intended for events that need to be able to trigger
events to different channels. In the case of hw-breakpoints, it's
either perf buffer, ptrace, etc...
Should I add some comments about it?
next prev parent reply other threads:[~2009-11-18 0:18 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-08 15:28 [GIT PULL v6] hw-breakpoints: Rewrite on top of perf events v6 Frederic Weisbecker
2009-11-08 15:28 ` [PATCH 1/7 v6] perf/core: Provide a kernel-internal interface to get to performance counters Frederic Weisbecker
2009-11-08 15:28 ` [PATCH 2/7 v6] x86/hw-breakpoints: Actually flush thread breakpoints in flush_thread() Frederic Weisbecker
2009-11-08 15:28 ` [PATCH 3/7 v6] perf/core: Add a callback to perf events Frederic Weisbecker
2009-11-17 11:28 ` Peter Zijlstra
2009-11-18 0:18 ` Frederic Weisbecker [this message]
2009-11-18 9:31 ` Peter Zijlstra
2009-11-19 15:43 ` Frederic Weisbecker
2009-11-19 22:40 ` Peter Zijlstra
2009-11-08 15:28 ` [PATCH 4/7 v6] hw-breakpoint: Move asm-generic/hw_breakpoint.h to linux/hw_breakpoint.h Frederic Weisbecker
2009-11-08 15:28 ` [PATCH 5/7 v6] hw-breakpoints: Rewrite the hw-breakpoints layer on top of perf events Frederic Weisbecker
2009-11-08 17:24 ` Jan Kiszka
2009-11-12 14:32 ` Frederic Weisbecker
2009-11-11 13:02 ` K.Prasad
2009-11-12 4:25 ` K.Prasad
2009-11-17 1:36 ` Frederic Weisbecker
2009-11-17 1:31 ` Frederic Weisbecker
2009-11-17 11:30 ` Peter Zijlstra
2009-11-18 0:19 ` Frederic Weisbecker
2009-11-08 15:29 ` [PATCH 6/7 v6] hw-breakpoints: Arbitrate access to pmu following registers constraints Frederic Weisbecker
2009-11-08 15:29 ` [PATCH 7/7 v6] ksym_tracer: Remove KSYM_SELFTEST_ENTRY Frederic Weisbecker
2009-11-08 17:03 ` [GIT PULL v6] hw-breakpoints: Rewrite on top of perf events v6 Ingo Molnar
2009-11-24 9:44 ` K.Prasad
2009-11-24 10:13 ` Ingo Molnar
2009-11-24 13:21 ` K.Prasad
2009-11-26 5:59 ` Frederic Weisbecker
2009-11-27 19:07 ` K.Prasad
2009-12-01 6:43 ` Frederic Weisbecker
2009-11-26 5:47 ` Frederic Weisbecker
2009-11-26 9:01 ` Ingo Molnar
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