Date: Mon, 22 Nov 2004 11:19:32 -0600
From: Robin Holt <holt@sgi.com>
To: Ray Bryant <raybry@sgi.com>
Cc: Kernel Mailing List <linux-kernel@vger.kernel.org>,
       "linux-ia64@vger.kernel.org" <linux-ia64@vger.kernel.org>,
       lse-tech <lse-tech@lists.sourceforge.net>, holt@sgi.com,
       Dean Roe <roe@sgi.com>, Brian Sumner <bls@sgi.com>,
       John Hawkes <hawkes@tomahawk.engr.sgi.com>
Subject: Re: scalability of signal delivery for Posix Threads
Message-ID: <20041122171932.GA19440@lnx-holt.americas.sgi.com>
References: <41A20AF3.9030408@sgi.com>
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On Mon, Nov 22, 2004 at 09:51:15AM -0600, Ray Bryant wrote:
> We've encountered a scalability problem with signal delivery.  Our 
> application
> is attempting to use ITIMER_PROF to deliver one signal per clock tick to 
> each
> thread of a ptrheaded (NPTL).  These threads are created with CLONE_SIGHAND,
> so that there is a single sighand->siglock for the entire application.

Ray, can you provide a simple example application that trips this case?
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