From: Nick Piggin <nickpiggin@yahoo.com.au>
To: linux-kernel <linux-kernel@vger.kernel.org>
Subject: [PATCH 0/3] better zone and watermark balancing
Date: Tue, 01 Nov 2005 16:18:18 +1100 [thread overview]
Message-ID: <4366FA9A.20402@yahoo.com.au> (raw)
This patchset I have had around for a long time and improves
various zone and watermark balancing by making calculations
more logical.
When reading 128GB through the pagecache, in 4 concurrent
streams, the final page residency and total reclaim ratios
look like this (no highmem, ~900MB RAM):
2.6.14-git3
DMA pages= 2214, scan= 124146
NRM pages=215966, scan=3990129
Pages Scan
DMA 01.01 03.01
NRM 98.99 96.99
2.6.14-git3-vm
DMA pages= 2220, scan= 99264
NRM pages=216373, scan=4011975
Pages Scan
DMA 01.01 02.41
NRM 98.99 97.59
So in this case, DMA is still getting a beating, but things have
improved nicely. Now are results with highmem and ~4GB RAM:
2.6.14-git3
DMA pages=0, scan=0
NRM pages=177241, scan=1607991
HIG pages=817122, scan=1607166
Pages Scan
DMA 00.00 00.00
NRM 17.83 50.01
HIG 82.17 49.99
2.6.14-git3-vm
DMA pages=0, scan=0
NRM pages=178215, scan=553311
HIG pages=815771, scan=2757744
Pages Scan
DMA 00.00 00.00
NRM 17.92 16.71
HIG 82.07 83.28
Current kernels are abysmal, while the patches bring scanning to
an almost perfect ratio.
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
next reply other threads:[~2005-11-01 5:16 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-01 5:18 Nick Piggin [this message]
2005-11-01 5:19 ` [PATCH 1/3] vm: kswapd incmin Nick Piggin
2005-11-01 5:20 ` [PATCH 2/3] vm: highmem watermarks Nick Piggin
2005-11-01 5:21 ` [PATCH 3/3] vm: writeout watermarks Nick Piggin
2005-11-07 15:33 ` Marcelo Tosatti
2005-11-07 21:13 ` Nikita Danilov
2005-11-07 23:12 ` Nick Piggin
2005-11-07 15:28 ` [PATCH 1/3] vm: kswapd incmin Marcelo Tosatti
2005-11-07 23:08 ` Nick Piggin
2005-11-07 18:43 ` Marcelo Tosatti
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