From: "Luck, Tony" <tony.luck@intel.com>
To: linux-ia64@vger.kernel.org
Subject: Re: Reading /proc/stat is slooow
Date: Tue, 06 Dec 2005 00:19:22 +0000 [thread overview]
Message-ID: <20051206001922.GA4920@agluck-lia64.sc.intel.com> (raw)
In-Reply-To: <je1x0v4cpy.fsf@sykes.suse.de>
On Tue, Dec 06, 2005 at 12:36:20AM +0100, Andreas Schwab wrote:
> About 20 miliseconds, ten times of what I see with 2.6.13. It appears to
> be that the generation of /proc/stat doesn't scale well any more with the
> number of configured CPUs (CONFIG_NR_CPUS is 512 here). Processes that
> monitor /proc/stat add a significant amount of load to the system.
I just tried CONFIG_NR_CPUS\x1024 ... and I don't see anything
like a 20ms delay on 2.6.15-rc5. How many actual cpus on your
machine (I only have two on the machine where I tested)?
-Tony
next prev parent reply other threads:[~2005-12-06 0:19 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-02 17:42 Reading /proc/stat is slooow Andreas Schwab
2005-12-05 22:21 ` Luck, Tony
2005-12-05 23:36 ` Andreas Schwab
2005-12-05 23:46 ` Andreas Schwab
2005-12-06 0:19 ` Luck, Tony [this message]
2005-12-06 1:21 ` Luck, Tony
2005-12-06 6:15 ` Luck, Tony
2005-12-06 9:24 ` Zou, Nanhai
2005-12-06 16:58 ` Luck, Tony
2005-12-06 17:10 ` Andreas Schwab
2005-12-07 19:54 ` [PATCH] Drop per-irq counters from /proc/stat (Was: Reading /proc/stat is slooow) Luck, Tony
2005-12-06 9:57 ` Reading /proc/stat is slooow Andreas Schwab
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