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Date:      Wed, 09 Jan 2008 12:23:24 +0200
From:      Krassimir Slavchev <krassi@bulinfo.net>
To:        Kris Kennaway <kris@FreeBSD.org>
Cc:        "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org>
Subject:   Re: Performance!
Message-ID:  <4784A09C.7070800@bulinfo.net>
In-Reply-To: <47840D44.9090106@FreeBSD.org>
References:  <476A5EE1.9000003@bulinfo.net> <476FF662.6050604@FreeBSD.org> <477BB7C0.3060603@bulinfo.net> <477C1FA3.2070904@FreeBSD.org> <477CC7DC.6060801@bulinfo.net> <47840D21.6060807@FreeBSD.org> <47840D44.9090106@FreeBSD.org>

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Hello,

Results with lock_manager and select patches and kern.hz=100
#threads        #transactions/sec
1               582
5               2083
10              2030
20              2421
40              1739
60              1409
80              1124
100             1034

This is with the BETA4. May be I should upgrade to RC1?
I will collect lock profiling statistics again.

Best Regards

Kris Kennaway wrote:
> Kris Kennaway wrote:
>> Krassimir Slavchev wrote:
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>>>
>>> Hello Kris,
>>>
>>> Here is the lock profiling results, see the attachment.
>>>
>>> Please, let me know if you want ssh access to this machine?
>>
>> Thanks, this is very interesting.  The problem is already fixed in 8.0
>> but we were not seeing it being this much of a factor on our test
>> hardware.  Possibly it is due to your CPUs being moderately faster and
>> causing a timing difference.  Anyway, try this patch.  If there is
>> still a performance deficit then repeating the lock profiling will be
>> useful.
>>
>> Kris
>>
>>
> 
> Now with actual patch.
> 
> Kris
> 

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