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From: Joshua Pincus <joshua.pincus@gmail.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
	"K.Prasad" <prasad@linux.vnet.ibm.com>,
	peterz@infradead.org, paulus@samba.org, acme@redhat.com,
	linux-kernel@vger.kernel.org
Subject: Re: HW breakpoints perf_events request
Date: Thu, 14 Jan 2010 10:03:27 -0800	[thread overview]
Message-ID: <bc915a051001141003s766689beue73800a1308d957e@mail.gmail.com> (raw)
In-Reply-To: <20100114092350.GF12241@basil.fritz.box>

Hi,

On Thu, Jan 14, 2010 at 1:23 AM, Andi Kleen <andi@firstfloor.org> wrote:
>> We would like to avoid using ptrace at all costs.
>> It requires us to have a parent thread running
>> which monitors all the others.  It's not clear that
>> the wait() call by the parent doesn't mask a barrage
>> of signals from various threads and the performance
>
> mask? It'll report them. You expect to have so
> many signals that this would be a problem?

Yes.  We expect to see a zillion of them.

> -Andi
>

Thanks,
JP

  reply	other threads:[~2010-01-14 18:03 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-01-14  1:45 Joshua Pincus
2010-01-14  2:15 ` Andi Kleen
2010-01-14  2:21   ` Joshua Pincus
2010-01-14  9:23     ` Andi Kleen
2010-01-14 18:03       ` Joshua Pincus [this message]
2010-01-18 11:04         ` Frederic Weisbecker
2010-01-18 11:35           ` Andi Kleen
2010-01-19 14:40             ` Frederic Weisbecker
2010-01-18 16:33           ` Frank Ch. Eigler
2010-01-19 14:50             ` Frederic Weisbecker
2010-01-19 15:12               ` Frank Ch. Eigler
2010-01-19 16:21                 ` Frederic Weisbecker
2010-01-19 16:26                   ` Peter Zijlstra
2010-01-19 17:44                   ` Frank Ch. Eigler
2010-01-14  5:10 ` Frederic Weisbecker
2010-01-14  8:44 ` Peter Zijlstra
2010-01-14 18:02   ` Joshua Pincus
2010-01-18 17:45 ` K.Prasad
2010-01-19 14:53   ` Frederic Weisbecker

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