From: "Alan D. Brunelle" <Alan.Brunelle@hp.com>
To: Vivek Goyal <vgoyal@redhat.com>
Cc: jens.axboe@oracle.com, linux-kernel@vger.kernel.org
Subject: Re: [RFC] Block IO Controller V2 - some results
Date: Tue, 17 Nov 2009 15:38:09 -0500 [thread overview]
Message-ID: <1258490289.18095.13.camel@cail> (raw)
In-Reply-To: <1258404660.3533.150.camel@cail>
Hi Vivek -
I've updated the runs - the results are shown at the end, I culled out
the write-related runs (haven't converted to direct I/O yet for those).
Next steps: Going to refresh to V3 of the patches and add in
http://groups.google.com/group/linux.kernel/browse_thread/thread/3b62f0665f0912b6/34ec9456c7da1bb7?lnk=raot
and convert the write-side to doing direct I/O (that would include the
rdwr tests, btw).
----------------------------------------------------------------------
I've relabeled things:
i0 = io control generated in the kernel, but not enabled
i1 = io control generated in the kernel, and is enabled
g0 = group_idle=0
g1 = group_idle=1 (default)
s8 = slide_idle=8 (default)
s0 = slice_idle=0
It looks like when the io control stuff is enabled we have random read
problems.
When it is enabled and slice_idle is set to 0 we see sequential reads
drop noticeably:
---- ---- - --------- --------- --------- --------- --------- ---------
Mode RdWr N base i0,gX,sX i1,g1,s8 i1,g0,s8 i1,g1,s0 i1,g0,s0
---- ---- - --------- --------- --------- --------- --------- ---------
rnd rd 2 17.3 17.1 9.1 9.3 9.4 9.5
rnd rd 4 27.1 27.1 8.2 8.0 8.0 8.0
rnd rd 8 37.1 37.1 7.1 6.8 6.7 6.8
seq rd 2 610.2 608.1 607.7 611.0 551.1 550.3
seq rd 4 608.4 601.5 607.7 609.6 549.6 550.0
seq rd 8 605.7 603.7 604.0 605.6 547.2 546.7
===============================================================
----------- ---- ---- - ----- ----- ----- ----- ----- ----- ----- -----
Test Mode RdWr N test0 test1 test2 test3 test4 test5 test6 test7
----------- ---- ---- - ----- ----- ----- ----- ----- ----- ----- -----
base rnd rd 2 8.6 8.6
base rnd rd 4 6.8 6.8 6.8 6.7
base rnd rd 8 4.7 4.6 4.6 4.6 4.6 4.6 4.6 4.6
base seq rd 2 306.2 304.0
base seq rd 4 150.1 152.4 151.9 154.0
base seq rd 8 77.2 75.9 75.9 73.9 77.0 75.7 75.0 74.9
----------- ---- ---- - ----- ----- ----- ----- ----- ----- ----- -----
Test Mode RdWr N test0 test1 test2 test3 test4 test5 test6 test7
----------- ---- ---- - ----- ----- ----- ----- ----- ----- ----- -----
i0,gX,sX rnd rd 2 8.6 8.6
i0,gX,sX rnd rd 4 6.8 6.8 6.7 6.7
i0,gX,sX rnd rd 8 4.7 4.6 4.6 4.7 4.6 4.6 4.6 4.6
i0,gX,sX seq rd 2 303.1 305.0
i0,gX,sX seq rd 4 150.8 151.6 149.0 150.2
i0,gX,sX seq rd 8 77.0 76.3 74.5 74.0 77.9 75.5 74.0 74.6
----------- ---- ---- - ----- ----- ----- ----- ----- ----- ----- -----
Test Mode RdWr N test0 test1 test2 test3 test4 test5 test6 test7
----------- ---- ---- - ----- ----- ----- ----- ----- ----- ----- -----
i1,g1,s8 rnd rd 2 2.8 6.3
i1,g1,s8 rnd rd 4 0.7 1.5 2.5 3.5
i1,g1,s8 rnd rd 8 0.2 0.4 0.5 0.7 0.9 1.2 1.4 1.7
i1,g1,s8 seq rd 2 221.6 386.1
i1,g1,s8 seq rd 4 70.6 128.1 181.7 227.3
i1,g1,s8 seq rd 8 21.4 40.3 55.8 71.2 85.1 99.1 109.4 121.7
----------- ---- ---- - ----- ----- ----- ----- ----- ----- ----- -----
Test Mode RdWr N test0 test1 test2 test3 test4 test5 test6 test7
----------- ---- ---- - ----- ----- ----- ----- ----- ----- ----- -----
i1,g0,s8 rnd rd 2 4.7 4.7
i1,g0,s8 rnd rd 4 2.0 2.0 2.0 2.0
i1,g0,s8 rnd rd 8 0.9 0.9 0.9 0.8 0.8 0.8 0.9 0.9
i1,g0,s8 seq rd 2 305.9 305.0
i1,g0,s8 seq rd 4 154.0 153.3 151.2 151.1
i1,g0,s8 seq rd 8 76.1 76.1 74.5 74.9 75.4 75.8 76.1 76.6
----------- ---- ---- - ----- ----- ----- ----- ----- ----- ----- -----
Test Mode RdWr N test0 test1 test2 test3 test4 test5 test6 test7
----------- ---- ---- - ----- ----- ----- ----- ----- ----- ----- -----
i1,g1,s0 rnd rd 2 4.7 4.7
i1,g1,s0 rnd rd 4 2.0 2.0 2.0 2.0
i1,g1,s0 rnd rd 8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.9
i1,g1,s0 seq rd 2 275.6 275.5
i1,g1,s0 seq rd 4 136.0 137.5 137.4 138.7
i1,g1,s0 seq rd 8 68.6 68.6 68.5 68.6 67.1 68.6 68.3 68.9
----------- ---- ---- - ----- ----- ----- ----- ----- ----- ----- -----
Test Mode RdWr N test0 test1 test2 test3 test4 test5 test6 test7
----------- ---- ---- - ----- ----- ----- ----- ----- ----- ----- -----
i1,g0,s0 rnd rd 2 4.7 4.7
i1,g0,s0 rnd rd 4 2.0 2.0 2.0 2.0
i1,g0,s0 rnd rd 8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.9
i1,g0,s0 seq rd 2 275.2 275.1
i1,g0,s0 seq rd 4 136.7 137.2 137.5 138.7
i1,g0,s0 seq rd 8 68.8 68.2 68.5 68.4 67.2 68.8 68.4 68.5
next prev parent reply other threads:[~2009-11-17 20:38 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-16 20:51 [RFC] Block IO Controller V2 - some results Alan D. Brunelle
2009-11-16 21:14 ` Vivek Goyal
2009-11-16 21:32 ` Alan D. Brunelle
2009-11-16 21:37 ` Vivek Goyal
2009-11-16 22:18 ` Vivek Goyal
2009-11-17 12:38 ` Alan D. Brunelle
2009-11-17 14:14 ` Vivek Goyal
2009-11-17 16:17 ` Corrado Zoccolo
2009-11-17 16:40 ` Vivek Goyal
2009-11-17 17:30 ` Alan D. Brunelle
2009-11-17 17:44 ` Vivek Goyal
2009-11-17 20:59 ` Corrado Zoccolo
2009-11-17 22:38 ` Vivek Goyal
2009-11-17 23:11 ` Corrado Zoccolo
2009-11-19 0:04 ` Vivek Goyal
2009-11-19 20:12 ` Corrado Zoccolo
2009-11-17 16:45 ` Alan D. Brunelle
2009-11-18 15:32 ` Vivek Goyal
2009-11-18 16:20 ` Corrado Zoccolo
2009-11-18 22:56 ` Vivek Goyal
2009-11-18 23:35 ` Corrado Zoccolo
2009-11-20 14:18 ` Vivek Goyal
2009-11-20 14:28 ` Corrado Zoccolo
2009-11-20 15:04 ` Vivek Goyal
2009-11-20 18:32 ` Corrado Zoccolo
2009-11-20 18:42 ` Vivek Goyal
2009-11-20 19:50 ` Corrado Zoccolo
2009-11-21 17:57 ` Corrado Zoccolo
2009-11-23 15:19 ` Vivek Goyal
2009-11-23 16:22 ` Corrado Zoccolo
2009-11-17 20:38 ` Alan D. Brunelle [this message]
2009-11-19 16:57 ` Vivek Goyal
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