From: duraid@fl.net.au
To: linux-ia64@vger.kernel.org
Subject: Re: [Linux-ia64] What's taking all the system time..?
Date: Wed, 30 Jan 2002 06:46:45 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105590698805954@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-105590698805950@msgid-missing>
Quoting Stephane Eranian <eranian@frankl.hpl.hp.com>:
> Just by curiosity, have you looked at the system log in /var/log/messages?
permission denied ;)
> I am guessing your program does some floating point operations.
> Have you seen something about floating-point software assist?
No flops in this code!
> Another potential cause could be unaligned accesses. That you can also see
> in the system log.
'dmesg' works and sure enough, I get unaligned accesses. But not enough to get
*that* sort of a performance hit, surely? To explain what I'm seeing, each
unaligned access would have to cost 0.05 seconds or so!
Duraid
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next prev parent reply other threads:[~2002-01-30 6:46 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-30 5:48 [Linux-ia64] What's taking all the system time..? Duraid Madina
2002-01-30 6:21 ` Stephane Eranian
2002-01-30 6:26 ` Niels Christiansen
2002-01-30 6:44 ` duraid
2002-01-30 6:46 ` duraid [this message]
2002-01-30 6:54 ` Stephane Eranian
2002-01-30 6:58 ` Niels Christiansen
2002-01-30 7:02 ` Niels Christiansen
2002-01-30 7:27 ` Niels Christiansen
2002-01-30 9:36 ` duraid
2002-01-30 10:04 ` [Linux-ia64] What's taking all the system time..? The unaligned accesses are! Duraid Madina
2002-01-30 17:43 ` [Linux-ia64] What's taking all the system time..? Boehm, Hans
2002-01-30 17:49 ` Grant Grundler
2002-01-30 18:04 ` Niels Christiansen
2002-01-30 21:57 ` Jim Wilson
2002-02-01 21:28 ` David Mosberger
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