From: Hedi Berriche <hedi@sgi.com>
To: Tony Luck <tony.luck@intel.com>
Cc: Petr Tesarik <ptesarik@suse.cz>,
"linux-ia64@vger.kernel.org" <linux-ia64@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Serious problem with ticket spinlocks on ia64
Date: Thu, 02 Sep 2010 00:26:41 +0000 [thread overview]
Message-ID: <20100902002641.GI18967@zorg.emea.sgi.com> (raw)
In-Reply-To: <AANLkTikUrNcuZB_CFn5cGFovN8U4eyPGL=nEdSP3JS9Z@mail.gmail.com>
On Thu, Sep 02, 2010 at 00:10 Tony Luck wrote:
| More results from other experiments ...
|
| 1) It occurred to me that I should check that these test cases weren't
| hitting some other problem in 2.6.36-rc3. So I ported the 64-bit
| version of ticket locks to the current kernel and ran the stress test.
| It was still going strong at 16 hours (where all my other experiments
| tend to fail at 90 minutes or less).
This is consistent with the bisection that led me to the 4 bytes ticket
locks commit.
| Summary: the only change that helps is the 64-bit ticket locks.
Ditto.
Cheers,
Hedi.
--
Hedi Berriche
Global Product Support
http://www.sgi.com/support
WARNING: multiple messages have this Message-ID (diff)
From: Hedi Berriche <hedi@sgi.com>
To: Tony Luck <tony.luck@intel.com>
Cc: Petr Tesarik <ptesarik@suse.cz>,
"linux-ia64@vger.kernel.org" <linux-ia64@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Serious problem with ticket spinlocks on ia64
Date: Thu, 2 Sep 2010 01:26:41 +0100 [thread overview]
Message-ID: <20100902002641.GI18967@zorg.emea.sgi.com> (raw)
In-Reply-To: <AANLkTikUrNcuZB_CFn5cGFovN8U4eyPGL=nEdSP3JS9Z@mail.gmail.com>
On Thu, Sep 02, 2010 at 00:10 Tony Luck wrote:
| More results from other experiments ...
|
| 1) It occurred to me that I should check that these test cases weren't
| hitting some other problem in 2.6.36-rc3. So I ported the 64-bit
| version of ticket locks to the current kernel and ran the stress test.
| It was still going strong at 16 hours (where all my other experiments
| tend to fail at 90 minutes or less).
This is consistent with the bisection that led me to the 4 bytes ticket
locks commit.
| Summary: the only change that helps is the 64-bit ticket locks.
Ditto.
Cheers,
Hedi.
--
Hedi Berriche
Global Product Support
http://www.sgi.com/support
next prev parent reply other threads:[~2010-09-02 0:26 UTC|newest]
Thread overview: 72+ 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 13:37 ` Petr Tesarik
2010-08-27 13:48 ` Hedi Berriche
2010-08-27 13:48 ` Hedi Berriche
2010-08-27 14:09 ` Petr Tesarik
2010-08-27 14:09 ` Petr Tesarik
2010-08-27 14:31 ` Hedi Berriche
2010-08-27 14:31 ` Hedi Berriche
2010-08-27 14:40 ` Petr Tesarik
2010-08-27 14:40 ` Petr Tesarik
2010-08-27 14:52 ` Hedi Berriche
2010-08-27 14:52 ` Hedi Berriche
2010-08-27 16:37 ` Petr Tesarik
2010-08-27 16:37 ` Petr Tesarik
2010-08-27 16:08 ` Luck, Tony
2010-08-27 16:08 ` Luck, Tony
2010-08-27 17:16 ` Petr Tesarik
2010-08-27 17:16 ` Petr Tesarik
2010-08-27 18:20 ` Hedi Berriche
2010-08-27 18:20 ` Hedi Berriche
2010-08-27 19:40 ` Petr Tesarik
2010-08-27 19:40 ` Petr Tesarik
2010-08-27 20:29 ` Luck, Tony
2010-08-27 20:29 ` Luck, Tony
2010-08-27 20:41 ` Petr Tesarik
2010-08-27 20:41 ` Petr Tesarik
2010-08-27 21:03 ` Petr Tesarik
2010-08-27 21:03 ` Petr Tesarik
2010-08-27 21:11 ` Luck, Tony
2010-08-27 21:11 ` Luck, Tony
2010-08-27 22:13 ` Petr Tesarik
2010-08-27 22:13 ` Petr Tesarik
2010-08-27 23:26 ` Luck, Tony
2010-08-27 23:26 ` Luck, Tony
2010-08-27 23:55 ` Luck, Tony
2010-08-27 23:55 ` Luck, Tony
2010-08-28 0:28 ` Hedi Berriche
2010-08-28 0:28 ` Hedi Berriche
2010-08-28 5:01 ` Luck, Tony
2010-08-28 5:01 ` Luck, Tony
2010-08-30 18:17 ` Luck, Tony
2010-08-30 18:17 ` Luck, Tony
2010-08-30 21:41 ` Petr Tesarik
2010-08-30 21:41 ` Petr Tesarik
2010-08-30 22:43 ` Tony Luck
2010-08-30 22:43 ` Tony Luck
2010-08-31 22:17 ` Tony Luck
2010-08-31 22:17 ` Tony Luck
2010-09-01 23:09 ` Tony Luck
2010-09-01 23:09 ` Tony Luck
2010-09-02 0:26 ` Hedi Berriche [this message]
2010-09-02 0:26 ` Hedi Berriche
2010-09-03 0:06 ` Tony Luck
2010-09-03 0:06 ` Tony Luck
2010-09-03 9:04 ` Petr Tesarik
2010-09-03 9:04 ` Petr Tesarik
2010-09-03 14:35 ` Petr Tesarik
2010-09-03 14:35 ` Petr Tesarik
2010-09-03 14:52 ` Petr Tesarik
2010-09-03 14:52 ` Petr Tesarik
2010-09-03 15:50 ` Tony Luck
2010-09-03 15:50 ` Tony Luck
2010-09-06 14:47 ` Petr Tesarik
2010-09-06 14:47 ` Petr Tesarik
2010-09-07 13:17 ` Petr Tesarik
2010-09-07 13:17 ` Petr Tesarik
2010-09-07 17:35 ` Tony Luck
2010-09-07 17:35 ` Tony Luck
2010-09-08 15:55 ` Tony Luck
2010-09-08 15:55 ` Tony Luck
2010-09-10 2:55 ` Dave Jones
2010-09-10 2:55 ` Dave Jones
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