From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <425AD727.5070304@engr.sgi.com> Date: Mon, 11 Apr 2005 14:59:35 -0500 From: Ray Bryant MIME-Version: 1.0 Subject: Re: question on page-migration code References: <4255B13E.8080809@engr.sgi.com> <20050407180858.GB19449@logos.cnet> In-Reply-To: <20050407180858.GB19449@logos.cnet> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Marcelo Tosatti Cc: Hirokazu Takahashi , Dave Hansen , linux-mm List-ID: Marcello, Checking /proc/vmstat/pgpgout appears to indicate that the pages I am migrating are being swapped out when I see the migration slow down, although something is fishy with pgpgout. pgpgout is supposed to be KB of page I/O, but I know that I am migrating 8685 pages, at 16KB/page, or 138960 KB. pgpgout gets incremented by roughly twice this. So it looks like either: (1) pgpgout is really sectors written, or (2) pages are being paged out twice as part of memory migration. I still don't understand why this pageout process doesn't happen every time I do a migration (e. g. never on the first time), and why it is taking 210 s to page out 138960 K. That's around 600 KB/s of I/O to the paging disk. -- Best Regards, Ray ----------------------------------------------- Ray Bryant 512-453-9679 (work) 512-507-7807 (cell) raybry@sgi.com raybry@austin.rr.com The box said: "Requires Windows 98 or better", so I installed Linux. ----------------------------------------------- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: aart@kvack.org