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Date:      Mon, 13 Aug 2012 17:33:52 -0400
From:      Mike Tancsa <mike@sentex.net>
To:        John Baldwin <jhb@freebsd.org>
Cc:        current@freebsd.org
Subject:   Re: [PATCH] Add locking to twe(4) so it no longer uses Giant
Message-ID:  <502972C0.9020000@sentex.net>
In-Reply-To: <201208031718.07569.jhb@freebsd.org>
References:  <201208031418.57941.jhb@freebsd.org> <201208031539.47735.jhb@freebsd.org> <501C37D3.5040704@sentex.net> <201208031718.07569.jhb@freebsd.org>

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On 8/3/2012 5:18 PM, John Baldwin wrote:
>>
>> Seems to apply to RELENG_9 just fine.  Are there any stress tests you
>> suggest I run that might expose some bugs ? The machine is not
>> production yet, so its ok to crash it.
> 
> Probably pho's stress2 stuff.  Thinks like dbench might be a good start as 
> well for initial testing.

dbench runs just fine with 20 clients. I am letting stress2's disk
stress test now.  The tw_cli seems to run the same when the controller
is super busy with pho's stress

I havent looked at performance differences, but a quick eyeball shows
about the same.

0{offsite2}# tw_cli "/c0 show"

Unit  UnitType  Status         %RCmpl  %V/I/M  Stripe  Size(GB)  Cache
AVrfy
------------------------------------------------------------------------------
u0    RAID-0    OK             -       -       64K     931.521   ON
-

Port   Status           Unit   Size        Blocks        Serial
---------------------------------------------------------------
p0     OK               u0     465.76 GB   976773168     WD-WCAYUEY18298

p1     OK               u0     465.76 GB   976773168     WD-WMAYUL256317


0{offsite2}#


 Operation      Count    AvgLat    MaxLat
 ----------------------------------------
 NTCreateX    1523290     1.527  2151.921
 Close        1119090     0.681  2001.144
 Rename         64489     3.669   748.957
 Unlink        307507     3.305  2075.871
 Deltree           40    35.922   194.337
 Mkdir             20     0.014     0.113
 Qpathinfo    1380911     0.292   637.855
 Qfileinfo     242016     0.001     0.201
 Qfsinfo       253036     0.006     2.063
 Sfileinfo     124125     3.539  1479.315
 Find          533771     0.417  1501.775
 WriteX        759745     0.195   403.113
 ReadX        2386679     0.033   322.923
 LockX           4952     0.004     0.018
 UnlockX         4952     0.003     0.240
 Flush         106775    59.541  2081.524

Throughput 79.6165 MB/sec  20 clients  20 procs  max_latency=2151.929 ms
Mon Aug 13 16:38:18 EDT 2012
     run: run time  3+00:00:00, incarnations   1, load 100, verbose 1
16:38:18 Loop #1
      rw: run time  0+00:02:00, incarnations  17, load 100, verbose 1
   creat: run time  0+00:02:00, incarnations  64, load  80, verbose 1
   mkdir: run time  0+00:02:00, incarnations  52, load  80, verbose 1
16:40:56 Loop #2
      rw: run time  0+00:02:00, incarnations  98, load 100, verbose 1
   creat: run time  0+00:02:00, incarnations  28, load  80, verbose 1
   mkdir: run time  0+00:02:00, incarnations  34, load  80, verbose 1
16:48:39 Loop #3
      rw: run time  0+00:02:00, incarnations  63, load 100, verbose 1
   creat: run time  0+00:02:00, incarnations  80, load  80, verbose 1
   mkdir: run time  0+00:02:00, incarnations  19, load  80, verbose 1
16:53:59 Loop #4
      rw: run time  0+00:02:00, incarnations  11, load 100, verbose 1
   creat: run time  0+00:02:00, incarnations  46, load  80, verbose 1
   mkdir: run time  0+00:02:00, incarnations  21, load  80, verbose 1

> 


-- 
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike@sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada   http://www.tancsa.com/



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