From: David Mosberger <davidm@napali.hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: should ia64_spinlock_contention do backoff?
Date: Thu, 25 Mar 2004 19:41:53 +0000 [thread overview]
Message-ID: <200403251941.i2PJfrTH026392@napali.hpl.hp.com> (raw)
Has anyone studied the impact of doing exponential backoff in
ia64_spinlock_contention. My theory is that it wouldn't buy much _if_
spinlocks always were in their own cachelines, but since they're not,
not using backoff could cause extra cache-line bouncing. To be
honest, I'd rather not spend time on this myself, since I don't have
convenient access to large machines, but me thinks this is a question
that's long overdue to have a proper answer.
--david
next reply other threads:[~2004-03-25 19:41 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-25 19:41 David Mosberger [this message]
2004-03-25 20:06 ` should ia64_spinlock_contention do backoff? John Hawkes
2004-03-25 22:13 ` Keith Owens
2004-03-25 22:28 ` David Mosberger
2004-03-26 17:16 ` markw
2004-03-26 23:41 ` Chris Wedgwood
2004-03-26 23:44 ` David Mosberger
2004-03-27 0:14 ` Chen, Kenneth W
2004-03-28 2:37 ` John Hawkes
2004-03-28 19:23 ` Matthew Wilcox
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