From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
linux-arch@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Stephane Eranian <eranian@googlemail.com>,
Eric Dumazet <dada1@cosmosbay.com>,
Robert Richter <robert.richter@amd.com>,
Arjan van de Veen <arjan@infradead.org>,
Peter Anvin <hpa@zytor.com>, Steven Rostedt <rostedt@goodmis.org>,
David Miller <davem@davemloft.net>
Subject: Re: [patch 0/3] [Announcement] Performance Counters for Linux
Date: Sat, 06 Dec 2008 13:34:39 +0100 [thread overview]
Message-ID: <1228566879.16244.4.camel@lappy.programming.kicks-ass.net> (raw)
In-Reply-To: <18745.49593.567217.277510@cargo.ozlabs.ibm.com>
On Sat, 2008-12-06 at 11:05 +1100, Paul Mackerras wrote:
> Now, the tables in perfmon's user-land libpfm that describe the
> mapping from abstract events to event-selector values and the
> constraints on what events can be counted together come to nearly
> 29,000 lines of code just for the IBM 64-bit powerpc processors.
>
> Your API condemns us to adding all that bloat to the kernel, plus the
> code to use those tables.
Since you need those tables and that code anyway, and in a solid
reliable way, what is the objection of carrying it in the kernel?
Furthermore, is there a good technical reason these cpus are so
complicated to use?
next prev parent reply other threads:[~2008-12-06 12:35 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-04 23:44 [patch 0/3] [Announcement] Performance Counters for Linux Thomas Gleixner
2008-12-04 23:44 ` [patch 1/3] performance counters: core code Thomas Gleixner
2008-12-05 10:55 ` Paul Mackerras
2008-12-05 11:20 ` Ingo Molnar
2008-12-04 23:44 ` [patch 2/3] performance counters: documentation Thomas Gleixner
2008-12-05 0:33 ` Paul Mackerras
2008-12-05 0:37 ` David Miller
2008-12-05 2:50 ` Arjan van de Ven
2008-12-05 3:26 ` David Miller
2008-12-05 2:33 ` Andi Kleen
2008-12-04 23:45 ` [patch 3/3] performance counters: x86 support Thomas Gleixner
2008-12-05 0:22 ` [patch 0/3] [Announcement] Performance Counters for Linux Paul Mackerras
2008-12-05 6:31 ` Ingo Molnar
2008-12-05 7:02 ` Arjan van de Ven
2008-12-05 7:52 ` David Miller
2008-12-05 7:03 ` Ingo Molnar
2008-12-05 7:16 ` Peter Zijlstra
2008-12-05 7:57 ` Paul Mackerras
2008-12-05 8:03 ` Peter Zijlstra
2008-12-05 8:07 ` David Miller
2008-12-05 8:11 ` Ingo Molnar
2008-12-05 8:17 ` David Miller
2008-12-05 8:24 ` Ingo Molnar
2008-12-05 8:27 ` David Miller
2008-12-05 8:42 ` Ingo Molnar
2008-12-05 8:49 ` David Miller
2008-12-05 12:13 ` Ingo Molnar
2008-12-05 12:39 ` Andi Kleen
2008-12-05 20:08 ` David Miller
2008-12-10 3:48 ` Paul Mundt
2008-12-10 4:42 ` Paul Mackerras
2008-12-10 8:43 ` Mikael Pettersson
2008-12-10 10:28 ` Andi Kleen
2008-12-10 10:28 ` Andi Kleen
2008-12-10 10:23 ` Paul Mundt
2008-12-10 11:03 ` Andi Kleen
2008-12-10 11:03 ` Andi Kleen
2008-12-05 15:00 ` Arjan van de Ven
2008-12-05 9:16 ` Paul Mackerras
2008-12-05 7:57 ` David Miller
2008-12-05 8:18 ` Ingo Molnar
2008-12-05 8:20 ` David Miller
2008-12-05 7:54 ` Paul Mackerras
2008-12-05 8:08 ` Ingo Molnar
2008-12-05 8:15 ` David Miller
2008-12-05 13:25 ` Ingo Molnar
2008-12-05 9:10 ` Paul Mackerras
2008-12-05 12:07 ` Ingo Molnar
2008-12-06 0:05 ` Paul Mackerras
2008-12-06 1:23 ` Mikael Pettersson
2008-12-06 12:34 ` Peter Zijlstra [this message]
2008-12-07 5:15 ` Paul Mackerras
2008-12-08 7:18 ` stephane eranian
2008-12-08 11:11 ` Ingo Molnar
2008-12-08 11:58 ` David Miller
2008-12-09 0:21 ` stephane eranian
2008-12-05 0:22 ` H. Peter Anvin
2008-12-05 0:43 ` Paul Mackerras
2008-12-05 1:12 ` David Miller
2008-12-05 6:10 ` Ingo Molnar
2008-12-05 7:50 ` David Miller
2008-12-05 9:34 ` Paul Mackerras
2008-12-05 10:41 ` Ingo Molnar
2008-12-05 10:05 ` Ingo Molnar
2008-12-05 3:30 ` Andrew Morton
2008-12-06 2:36 ` stephane eranian
2008-12-08 2:12 ` [perfmon2] [patch 0/3] [Announcement] Performance Counters forLinux Dan Terpstra
2008-12-08 2:12 ` Dan Terpstra
2008-12-10 16:27 ` [patch 0/3] [Announcement] Performance Counters for Linux Rob Fowler
2008-12-10 16:27 ` [perfmon2] " Rob Fowler
2008-12-10 17:11 ` Andi Kleen
2008-12-10 17:11 ` Andi Kleen
-- strict thread matches above, loose matches on Subject: below --
2008-12-05 21:24 Corey Ashford
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