From: Ingo Molnar <mingo@elte.hu>
To: eranian@gmail.com
Cc: David Miller <davem@davemloft.net>,
paulus@samba.org, a.p.zijlstra@chello.nl,
linux-kernel@vger.kernel.org, perfmon2-devel@lists.sf.net
Subject: Re: [PATCH 2/2] perf_events: add event constraints support for Intel processors
Date: Tue, 13 Oct 2009 09:29:01 +0200 [thread overview]
Message-ID: <20091013072901.GA9610@elte.hu> (raw)
In-Reply-To: <7c86c4470910130017s72e0b936u3eee0caba00acd22@mail.gmail.com>
* stephane eranian <eranian@googlemail.com> wrote:
> > Spreading them all out into architecture code is the far worse
> > solution, it creates a fragile distributed monster with repeating
> > patterns - instead we want a manageable central monster ;-) [We are
> > also quite good at controlling and shrinking monsters in the core
> > kernel.]
>
> I don't understand this either.
> Why would architecture specific code be more fragile ?
Because similar code spread out and partly duplicated in 22
architectures is an order of magnitude less maintainable than
a core library.
Ingo
next prev parent reply other threads:[~2009-10-13 7:29 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-06 14:42 [PATCH 0/2] perf_events: correct event assignments on Intel processors Stephane Eranian
2009-10-06 14:42 ` [PATCH 1/2] perf_events: check for filters on fixed counter events Stephane Eranian
2009-10-06 14:42 ` [PATCH 2/2] perf_events: add event constraints support for Intel processors Stephane Eranian
2009-10-06 16:29 ` Peter Zijlstra
2009-10-06 17:26 ` stephane eranian
2009-10-06 18:57 ` [perfmon2] " Vince Weaver
2009-10-07 10:31 ` Peter Zijlstra
2009-10-07 11:15 ` Paul Mackerras
2009-10-07 12:31 ` stephane eranian
2009-10-07 20:46 ` David Miller
2009-10-07 21:30 ` stephane eranian
2009-10-08 20:08 ` Ingo Molnar
2009-10-08 20:28 ` stephane eranian
2009-10-12 9:05 ` Ingo Molnar
2009-10-13 7:17 ` stephane eranian
2009-10-13 7:29 ` Ingo Molnar [this message]
2009-10-08 23:18 ` Paul Mackerras
2009-10-09 14:22 ` [tip:perf/core] perf, x86: Add simple group validation tip-bot for Peter Zijlstra
2009-10-09 13:55 ` [PATCH 2/2] perf_events: add event constraints support for Intel processors Ingo Molnar
2009-10-09 14:22 ` [tip:perf/core] perf_events: Add " tip-bot for Stephane Eranian
2009-10-09 14:22 ` [tip:perf/core] perf_events: Check for filters on fixed counter events tip-bot for Stephane Eranian
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