From: Hedi Berriche <hedi@sgi.com>
To: Petr Tesarik <ptesarik@suse.cz>
Cc: linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org,
Tony Luck <tony.luck@intel.com>
Subject: Re: Serious problem with ticket spinlocks on ia64
Date: Fri, 27 Aug 2010 15:52:31 +0100 [thread overview]
Message-ID: <20100827145231.GZ18967@zorg.emea.sgi.com> (raw)
In-Reply-To: <201008271640.49542.ptesarik@suse.cz>
On Fri, Aug 27, 2010 at 15:40 Petr Tesarik wrote:
| On Friday 27 of August 2010 16:31:35 Hedi Berriche wrote:
|
| > That said, I'm letting my already over 36 hours run carry on chewing CPU
| > time, and see if it will eventually trip the same problem seen with 4-byte
| > ticket locks.
|
| Hm, this doesn't sound like a viable approach. Since the siglock gets
| initialized to 0 when a new process is started, it may never actually wrap
| around.
|
| I would rather attach a SystemTap probe somewhere during process fork and add
| a bias to the siglock. That should work fine. Let me knock up the SystemTap
| script...
That would be nice. Ta!
Cheers,
Hedi.
--
Hedi Berriche
Global Product Support
http://www.sgi.com/support
next prev parent reply other threads:[~2010-08-27 14:52 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-27 13:37 Serious problem with ticket spinlocks on ia64 Petr Tesarik
2010-08-27 13:48 ` Hedi Berriche
2010-08-27 14:09 ` Petr Tesarik
2010-08-27 14:31 ` Hedi Berriche
2010-08-27 14:40 ` Petr Tesarik
2010-08-27 14:52 ` Hedi Berriche [this message]
2010-08-27 16:37 ` Petr Tesarik
2010-08-27 16:08 ` Luck, Tony
2010-08-27 17:16 ` Petr Tesarik
2010-08-27 18:20 ` Hedi Berriche
2010-08-27 19:40 ` Petr Tesarik
2010-08-27 20:29 ` Luck, Tony
2010-08-27 20:41 ` Petr Tesarik
2010-08-27 21:03 ` Petr Tesarik
2010-08-27 21:11 ` Luck, Tony
2010-08-27 22:13 ` Petr Tesarik
2010-08-27 23:26 ` Luck, Tony
2010-08-27 23:55 ` Luck, Tony
2010-08-28 0:28 ` Hedi Berriche
2010-08-28 5:01 ` Luck, Tony
2010-08-30 18:17 ` Luck, Tony
2010-08-30 21:41 ` Petr Tesarik
2010-08-30 22:43 ` Tony Luck
2010-08-31 22:17 ` Tony Luck
2010-09-01 23:09 ` Tony Luck
2010-09-02 0:26 ` Hedi Berriche
2010-09-03 0:06 ` Tony Luck
2010-09-03 9:04 ` Petr Tesarik
2010-09-03 14:35 ` Petr Tesarik
2010-09-03 14:52 ` Petr Tesarik
2010-09-03 15:50 ` Tony Luck
2010-09-06 14:47 ` Petr Tesarik
2010-09-07 13:17 ` Petr Tesarik
2010-09-07 17:35 ` Tony Luck
2010-09-08 15:55 ` Tony Luck
2010-09-10 2:55 ` Dave Jones
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