RE: Serious problem with ticket spinlocks on ia64 -- Linux for ia64 (Itanium)


RE: Serious problem with ticket spinlocks on ia64
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To: Petr Tesarik <ptesarik@xxxxxxx>
Subject: RE: Serious problem with ticket spinlocks on ia64
From: "Luck, Tony" <tony.luck@xxxxxxxxx>
Date: Fri, 27 Aug 2010 16:55:46 -0700
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Cc: "linux-ia64@xxxxxxxxxxxxxxx" <linux-ia64@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, Hedi Berriche <hedi@xxxxxxx>
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References: <201008271537.35709.ptesarik@xxxxxxx> <201008272303.34228.ptesarik@xxxxxxx> <987664A83D2D224EAE907B061CE93D53015D91D45F@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> <201008280013.19941.ptesarik@xxxxxxx> <987664A83D2D224EAE907B061CE93D53015D91D604@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
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Thread-topic: Serious problem with ticket spinlocks on ia64

> this fails so catastrophically

Interesting ... getting rid of some of the fancy asm bits
(replacing both the ld4.c.nc and the ld2.bias with simple
"serve = *p" and "tmp = *p") makes this run a lot better.

-Tony

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