From: Ingo Molnar <mingo@elte.hu>
To: Peter Zijlstra <peterz@infradead.org>
Cc: "Luck, Tony" <tony.luck@intel.com>,
Paul Mackerras <paulus@samba.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] ia64 support for tools/perf/
Date: Wed, 18 Nov 2009 20:39:27 +0100 [thread overview]
Message-ID: <20091118193927.GA30470@elte.hu> (raw)
In-Reply-To: <1258563396.3918.698.camel@laptop>
* Peter Zijlstra <peterz@infradead.org> wrote:
> On Tue, 2009-11-17 at 09:25 -0800, Luck, Tony wrote:
> > > Btw., are you planning HAVE_PERF_EVENTS support for IA64? (It's nice
> > > stuff, i can only recommend it! ;-)
> >
> > My first goal is getting the s/w events hooked up and working. I'm
> > still wondering about how to get the h/w counters to co-exist with
> > perfmon (which has been part of ia64 API for many years).
>
> A first approach could be to make them mutually exclusive at runtime.
> When there's a perf_event user, perfmon users get FAIL and vs.
>
> This is basically the state for x86 perf_event vs oprofile atm.
Yep, this is probably the least intrusive approach. Mixing the
implementations beyond trivial exclusion would probably be pain.
Ingo
next prev parent reply other threads:[~2009-11-18 19:39 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-17 17:05 [PATCH] ia64 support for tools/perf/ Luck, Tony
2009-11-17 17:18 ` [tip:perf/core] perf tools: Add " tip-bot for Luck, Tony
2009-11-17 17:21 ` [PATCH] " Ingo Molnar
2009-11-17 17:25 ` Luck, Tony
2009-11-18 16:56 ` Peter Zijlstra
2009-11-18 19:39 ` Ingo Molnar [this message]
2009-11-19 5:30 ` [tip:perf/core] perf tools: Add " tip-bot for Luck, Tony
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