From: fche@redhat.com (Frank Ch. Eigler)
To: eranian@hpl.hp.com
Cc: Christoph Hellwig <hch@infradead.org>,
linux-kernel@vger.kernel.org, systemtap@sources.redhat.com,
wcohen@redhat.com, perfmon@napali.hpl.hp.com
Subject: Re: [PATCH 9/16] 2.6.17-rc6 perfmon2 patch for review: kernel-level API support (kapi)
Date: 16 Jun 2006 11:41:32 -0400 [thread overview]
Message-ID: <y0mhd2lumz7.fsf@ton.toronto.redhat.com> (raw)
In-Reply-To: <20060616140234.GI10034@frankl.hpl.hp.com>
Stephane Eranian <eranian@hpl.hp.com> writes:
> > > This patch contains the kernel-level API support.
> > NACK. No one should call this from kernel space.
>
> Well, that's what I initially thought too but there is a need from
> the SystemTap people and given the way they set things up, it is
> hard to do it from user level. [...]
Whether one uses systemtap, raw kprobes, or some specialized
tracing/stats-collecting patch surely forthcoming, kernel-level APIs
would be needed to perform fine-grained kernel-scope measurements
using these counters.
- FChE
next prev parent reply other threads:[~2006-06-16 15:45 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-15 9:07 Stephane Eranian
2006-06-16 13:50 ` Christoph Hellwig
2006-06-16 14:02 ` Stephane Eranian
2006-06-16 14:56 ` Christoph Hellwig
2006-06-17 0:15 ` Alan Cox
2006-06-16 15:41 ` Frank Ch. Eigler [this message]
2006-06-16 15:45 ` Christoph Hellwig
2006-06-16 16:18 ` Frank Ch. Eigler
2006-06-22 12:12 ` [perfmon] " Stephane Eranian
2006-06-22 17:00 ` William Cohen
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