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Date: Mon, 17 Oct 2011 11:03:10 +0800
From: Wu Fengguang <fengguang.wu@...el.com>
To: Trond Myklebust <Trond.Myklebust@...app.com>,
linux-nfs@...r.kernel.org
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Jan Kara <jack@...e.cz>, Christoph Hellwig <hch@....de>,
Dave Chinner <david@...morbit.com>,
Greg Thelen <gthelen@...gle.com>,
Minchan Kim <minchan.kim@...il.com>,
Vivek Goyal <vgoyal@...hat.com>,
Andrea Righi <arighi@...eler.com>,
linux-mm <linux-mm@...ck.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 00/11] IO-less dirty throttling v12
Hi Trond,
I enhanced the script to compare the write_bw as well as the NFS
write/commit stats.
3.1.0-rc4-vanilla+ 3.1.0-rc8-nfs-wq+
------------------------ ------------------------
(MB/s) 275.28 +28.5% 353.72 TOTAL write_bw
5649.00 +192.3% 16510.00 TOTAL nfs_nr_commits (*)
261987.00 +205.1% 799451.00 TOTAL nfs_nr_writes (*)
(MB) 866.52 -18.1% 709.85 TOTAL nfs_commit_size (**)
2.94 -44.8% 1.62 TOTAL nfs_write_size
(ms) 47814.05 -84.0% 7631.57 TOTAL nfs_write_queue_time
1405.05 -53.6% 652.59 TOTAL nfs_write_rtt_time
49237.94 -83.2% 8292.74 TOTAL nfs_write_execute_time
4320.98 -83.2% 726.27 TOTAL nfs_commit_queue_time
22943.13 -8.6% 20963.46 TOTAL nfs_commit_rtt_time
27307.42 -20.5% 21714.12 TOTAL nfs_commit_execute_time
(*) The x3 nfs_nr_writes and nfs_nr_commits numbers should be taken
with a salt because the total written bytes are increased at the
same time.
(**) The TOTAL nfs_commit_size mainly reflects the thresh=1G cases
because the numbers in the 10M/100M cases are very small
comparing to the 1G cases (as shown in the below case by case
values). Ditto for the *_time values. However the thresh=1G
cases should be most close to the typical NFS client setup, so
the values are still mostly representative numbers.
Below are the detailed case by case views. The script is attached,
which shows how exactly the numbers are calculated from mountstats.
Thanks,
Fengguang
---
3.1.0-rc4-vanilla+ 3.1.0-rc8-nfs-wq+
------------------------ ------------------------
20.89 +95.2% 40.77 NFS-thresh=100M/nfs-10dd-1M-32p-32768M-100M:10-X
39.43 +9.2% 43.07 NFS-thresh=100M/nfs-1dd-1M-32p-32768M-100M:10-X
26.60 +70.6% 45.39 NFS-thresh=100M/nfs-2dd-1M-32p-32768M-100M:10-X
12.70 +56.1% 19.83 NFS-thresh=10M/nfs-10dd-1M-32p-32768M-10M:10-X
27.41 +19.7% 32.81 NFS-thresh=10M/nfs-1dd-1M-32p-32768M-10M:10-X
26.52 +16.8% 30.97 NFS-thresh=10M/nfs-2dd-1M-32p-32768M-10M:10-X
40.70 +16.5% 47.42 NFS-thresh=1G/nfs-10dd-1M-32p-32768M-1024M:10-X
45.28 -2.4% 44.20 NFS-thresh=1G/nfs-1dd-1M-32p-32768M-1024M:10-X
35.74 +37.8% 49.26 NFS-thresh=1G/nfs-2dd-1M-32p-32768M-1024M:10-X
275.28 +28.5% 353.72 TOTAL write_bw
3.1.0-rc4-vanilla+ 3.1.0-rc8-nfs-wq+
------------------------ ------------------------
825.00 +196.8% 2449.00 NFS-thresh=100M/nfs-10dd-1M-32p-32768M-100M:10-X
250.00 +6.8% 267.00 NFS-thresh=100M/nfs-1dd-1M-32p-32768M-100M:10-X
272.00 +114.7% 584.00 NFS-thresh=100M/nfs-2dd-1M-32p-32768M-100M:10-X
1477.00 +350.8% 6658.00 NFS-thresh=10M/nfs-10dd-1M-32p-32768M-10M:10-X
997.00 +115.8% 2152.00 NFS-thresh=10M/nfs-1dd-1M-32p-32768M-10M:10-X
1521.00 +154.3% 3868.00 NFS-thresh=10M/nfs-2dd-1M-32p-32768M-10M:10-X
235.00 +83.4% 431.00 NFS-thresh=1G/nfs-10dd-1M-32p-32768M-1024M:10-X
29.00 +20.7% 35.00 NFS-thresh=1G/nfs-1dd-1M-32p-32768M-1024M:10-X
43.00 +53.5% 66.00 NFS-thresh=1G/nfs-2dd-1M-32p-32768M-1024M:10-X
5649.00 +192.3% 16510.00 TOTAL nfs_nr_commits
3.1.0-rc4-vanilla+ 3.1.0-rc8-nfs-wq+
------------------------ ------------------------
32294.00 -14.6% 27571.00 NFS-thresh=100M/nfs-10dd-1M-32p-32768M-100M:10-X
28858.00 +616.0% 206620.00 NFS-thresh=100M/nfs-1dd-1M-32p-32768M-100M:10-X
32593.00 +202.7% 98662.00 NFS-thresh=100M/nfs-2dd-1M-32p-32768M-100M:10-X
18937.00 +111.7% 40085.00 NFS-thresh=10M/nfs-10dd-1M-32p-32768M-10M:10-X
18762.00 +660.5% 142691.00 NFS-thresh=10M/nfs-1dd-1M-32p-32768M-10M:10-X
21473.00 +298.8% 85640.00 NFS-thresh=10M/nfs-2dd-1M-32p-32768M-10M:10-X
47281.00 +5.0% 49625.00 NFS-thresh=1G/nfs-10dd-1M-32p-32768M-1024M:10-X
33108.00 +77.1% 58632.00 NFS-thresh=1G/nfs-1dd-1M-32p-32768M-1024M:10-X
28681.00 +213.5% 89925.00 NFS-thresh=1G/nfs-2dd-1M-32p-32768M-1024M:10-X
261987.00 +205.1% 799451.00 TOTAL nfs_nr_writes
3.1.0-rc4-vanilla+ 3.1.0-rc8-nfs-wq+
------------------------ ------------------------
7.69 -35.6% 4.95 NFS-thresh=100M/nfs-10dd-1M-32p-32768M-100M:10-X
47.41 -1.3% 46.81 NFS-thresh=100M/nfs-1dd-1M-32p-32768M-100M:10-X
29.39 -22.1% 22.90 NFS-thresh=100M/nfs-2dd-1M-32p-32768M-100M:10-X
2.73 -68.3% 0.87 NFS-thresh=10M/nfs-10dd-1M-32p-32768M-10M:10-X
8.24 -46.7% 4.39 NFS-thresh=10M/nfs-1dd-1M-32p-32768M-10M:10-X
5.21 -55.1% 2.34 NFS-thresh=10M/nfs-2dd-1M-32p-32768M-10M:10-X
56.99 -42.5% 32.79 NFS-thresh=1G/nfs-10dd-1M-32p-32768M-1024M:10-X
453.65 -18.1% 371.54 NFS-thresh=1G/nfs-1dd-1M-32p-32768M-1024M:10-X
255.21 -12.5% 223.26 NFS-thresh=1G/nfs-2dd-1M-32p-32768M-1024M:10-X
866.52 -18.1% 709.85 TOTAL nfs_commit_size
3.1.0-rc4-vanilla+ 3.1.0-rc8-nfs-wq+
------------------------ ------------------------
0.20 +123.8% 0.44 NFS-thresh=100M/nfs-10dd-1M-32p-32768M-100M:10-X
0.41 -85.3% 0.06 NFS-thresh=100M/nfs-1dd-1M-32p-32768M-100M:10-X
0.25 -44.7% 0.14 NFS-thresh=100M/nfs-2dd-1M-32p-32768M-100M:10-X
0.21 -32.4% 0.14 NFS-thresh=10M/nfs-10dd-1M-32p-32768M-10M:10-X
0.44 -84.9% 0.07 NFS-thresh=10M/nfs-1dd-1M-32p-32768M-10M:10-X
0.37 -71.4% 0.11 NFS-thresh=10M/nfs-2dd-1M-32p-32768M-10M:10-X
0.28 +0.5% 0.28 NFS-thresh=1G/nfs-10dd-1M-32p-32768M-1024M:10-X
0.40 -44.2% 0.22 NFS-thresh=1G/nfs-1dd-1M-32p-32768M-1024M:10-X
0.38 -57.2% 0.16 NFS-thresh=1G/nfs-2dd-1M-32p-32768M-1024M:10-X
2.94 -44.8% 1.62 TOTAL nfs_write_size
3.1.0-rc4-vanilla+ 3.1.0-rc8-nfs-wq+
------------------------ ------------------------
3249.09 -93.2% 222.32 NFS-thresh=100M/nfs-10dd-1M-32p-32768M-100M:10-X
221.23 +98.2% 438.48 NFS-thresh=100M/nfs-1dd-1M-32p-32768M-100M:10-X
5942.01 -68.7% 1857.66 NFS-thresh=100M/nfs-2dd-1M-32p-32768M-100M:10-X
285.75 -99.9% 0.38 NFS-thresh=10M/nfs-10dd-1M-32p-32768M-10M:10-X
6.21 -95.4% 0.28 NFS-thresh=10M/nfs-1dd-1M-32p-32768M-10M:10-X
34.73 -92.4% 2.63 NFS-thresh=10M/nfs-2dd-1M-32p-32768M-10M:10-X
29155.55 -99.3% 215.70 NFS-thresh=1G/nfs-10dd-1M-32p-32768M-1024M:10-X
2704.81 -6.3% 2535.52 NFS-thresh=1G/nfs-1dd-1M-32p-32768M-1024M:10-X
6214.66 -62.0% 2358.60 NFS-thresh=1G/nfs-2dd-1M-32p-32768M-1024M:10-X
47814.05 -84.0% 7631.57 TOTAL nfs_write_queue_time
3.1.0-rc4-vanilla+ 3.1.0-rc8-nfs-wq+
------------------------ ------------------------
268.37 -69.6% 81.55 NFS-thresh=100M/nfs-10dd-1M-32p-32768M-100M:10-X
80.00 -38.0% 49.59 NFS-thresh=100M/nfs-1dd-1M-32p-32768M-100M:10-X
110.81 -50.8% 54.54 NFS-thresh=100M/nfs-2dd-1M-32p-32768M-100M:10-X
295.72 -41.7% 172.52 NFS-thresh=10M/nfs-10dd-1M-32p-32768M-10M:10-X
36.64 -31.6% 25.05 NFS-thresh=10M/nfs-1dd-1M-32p-32768M-10M:10-X
100.70 -33.5% 66.93 NFS-thresh=10M/nfs-2dd-1M-32p-32768M-10M:10-X
253.68 -67.2% 83.33 NFS-thresh=1G/nfs-10dd-1M-32p-32768M-1024M:10-X
55.16 +46.4% 80.77 NFS-thresh=1G/nfs-1dd-1M-32p-32768M-1024M:10-X
203.96 -81.2% 38.30 NFS-thresh=1G/nfs-2dd-1M-32p-32768M-1024M:10-X
1405.05 -53.6% 652.59 TOTAL nfs_write_rtt_time
3.1.0-rc4-vanilla+ 3.1.0-rc8-nfs-wq+
------------------------ ------------------------
3517.58 -91.4% 304.13 NFS-thresh=100M/nfs-10dd-1M-32p-32768M-100M:10-X
302.26 +61.7% 488.90 NFS-thresh=100M/nfs-1dd-1M-32p-32768M-100M:10-X
6053.53 -68.4% 1912.75 NFS-thresh=100M/nfs-2dd-1M-32p-32768M-100M:10-X
581.52 -70.3% 173.00 NFS-thresh=10M/nfs-10dd-1M-32p-32768M-10M:10-X
42.99 -40.7% 25.47 NFS-thresh=10M/nfs-1dd-1M-32p-32768M-10M:10-X
135.56 -48.5% 69.75 NFS-thresh=10M/nfs-2dd-1M-32p-32768M-10M:10-X
29411.03 -99.0% 299.78 NFS-thresh=1G/nfs-10dd-1M-32p-32768M-1024M:10-X
2768.01 -5.4% 2618.62 NFS-thresh=1G/nfs-1dd-1M-32p-32768M-1024M:10-X
6425.46 -62.6% 2400.33 NFS-thresh=1G/nfs-2dd-1M-32p-32768M-1024M:10-X
49237.94 -83.2% 8292.74 TOTAL nfs_write_execute_time
3.1.0-rc4-vanilla+ 3.1.0-rc8-nfs-wq+
------------------------ ------------------------
99.56 -97.5% 2.49 NFS-thresh=100M/nfs-10dd-1M-32p-32768M-100M:10-X
108.12 -83.8% 17.50 NFS-thresh=100M/nfs-1dd-1M-32p-32768M-100M:10-X
89.87 -97.5% 2.26 NFS-thresh=100M/nfs-2dd-1M-32p-32768M-100M:10-X
9.00 -90.5% 0.85 NFS-thresh=10M/nfs-10dd-1M-32p-32768M-10M:10-X
2.41 -58.2% 1.01 NFS-thresh=10M/nfs-1dd-1M-32p-32768M-10M:10-X
2.68 -59.9% 1.07 NFS-thresh=10M/nfs-2dd-1M-32p-32768M-10M:10-X
1398.01 -64.0% 503.61 NFS-thresh=1G/nfs-10dd-1M-32p-32768M-1024M:10-X
1558.97 -97.9% 33.03 NFS-thresh=1G/nfs-1dd-1M-32p-32768M-1024M:10-X
1052.37 -84.4% 164.45 NFS-thresh=1G/nfs-2dd-1M-32p-32768M-1024M:10-X
4320.98 -83.2% 726.27 TOTAL nfs_commit_queue_time
3.1.0-rc4-vanilla+ 3.1.0-rc8-nfs-wq+
------------------------ ------------------------
896.68 -6.3% 840.25 NFS-thresh=100M/nfs-10dd-1M-32p-32768M-100M:10-X
919.00 +0.9% 926.98 NFS-thresh=100M/nfs-1dd-1M-32p-32768M-100M:10-X
1088.05 -24.0% 827.14 NFS-thresh=100M/nfs-2dd-1M-32p-32768M-100M:10-X
266.54 -22.7% 206.09 NFS-thresh=10M/nfs-10dd-1M-32p-32768M-10M:10-X
191.28 -41.3% 112.32 NFS-thresh=10M/nfs-1dd-1M-32p-32768M-10M:10-X
187.90 -34.0% 123.98 NFS-thresh=10M/nfs-2dd-1M-32p-32768M-10M:10-X
4671.46 -11.8% 4119.49 NFS-thresh=1G/nfs-10dd-1M-32p-32768M-1024M:10-X
6586.97 -3.1% 6382.66 NFS-thresh=1G/nfs-1dd-1M-32p-32768M-1024M:10-X
8135.26 -8.7% 7424.56 NFS-thresh=1G/nfs-2dd-1M-32p-32768M-1024M:10-X
22943.13 -8.6% 20963.46 TOTAL nfs_commit_rtt_time
3.1.0-rc4-vanilla+ 3.1.0-rc8-nfs-wq+
------------------------ ------------------------
996.58 -15.4% 843.02 NFS-thresh=100M/nfs-10dd-1M-32p-32768M-100M:10-X
1027.14 -8.0% 944.51 NFS-thresh=100M/nfs-1dd-1M-32p-32768M-100M:10-X
1178.59 -29.6% 829.52 NFS-thresh=100M/nfs-2dd-1M-32p-32768M-100M:10-X
275.75 -24.9% 207.03 NFS-thresh=10M/nfs-10dd-1M-32p-32768M-10M:10-X
193.71 -41.5% 113.35 NFS-thresh=10M/nfs-1dd-1M-32p-32768M-10M:10-X
190.67 -34.4% 125.12 NFS-thresh=10M/nfs-2dd-1M-32p-32768M-10M:10-X
6071.22 -23.8% 4624.14 NFS-thresh=1G/nfs-10dd-1M-32p-32768M-1024M:10-X
8146.03 -21.2% 6415.71 NFS-thresh=1G/nfs-1dd-1M-32p-32768M-1024M:10-X
9227.72 -17.5% 7611.71 NFS-thresh=1G/nfs-2dd-1M-32p-32768M-1024M:10-X
27307.42 -20.5% 21714.12 TOTAL nfs_commit_execute_time
Download attachment "compare.rb" of type "application/x-ruby" (6000 bytes)
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