From: Nigel Cunningham <ncunningham@clear.net.nz>
To: "'Ducrot Bruno'" <poup@poupinou.org>,
"'Kai Germaschewski'" <kai@tp1.ruhr-uni-bochum.de>
Cc: "'Grover, Andrew'" <andrew.grover@intel.com>,
linux-kernel@vger.kernel.org, "'Pavel Machek'" <pavel@suse.cz>,
acpi-devel@lists.sourceforge.net
Subject: RE: [ACPI] Re: [PATCH] S4bios for 2.5.52.
Date: Thu, 19 Dec 2002 08:37:30 +1300 [thread overview]
Message-ID: <000401c2a6cc$ec43a2f0$0101010a@NigelLaptop> (raw)
In-Reply-To: <20021218085902.GD1012@poup.poupinou.org>
> Kai, if you see that S4OS is slower, it is probably a bug
> that have to be
> fixed in swsusp.
There does seem to be a problem with the rw_swap_page_sync routine. Perhaps
not on Pavel's machine (:>), but I've experienced painfully slow suspends
too. Performance was helped immensely by applying a concept that I'll credit
Lyle Seaman for - unrolling rw_swap_page_sync and submitting all the IO for
pages then looping again and waiting on each sync. I found with writing 7000
or so pages (a suspend from init S) that something gets triggered to force
the sync about every 3900 pages anyway.
Regards,
Nigel
prev parent reply other threads:[~2002-12-18 19:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-17 21:39 [PATCH] S4bios for 2.5.52 Grover, Andrew
2002-12-17 22:14 ` Kai Germaschewski
2002-12-18 8:59 ` Ducrot Bruno
2002-12-18 19:37 ` Nigel Cunningham [this message]
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