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Message-ID: <CAA_GA1eoD6Q6uYjQyJUhSuusNZn7TvekF1-EQLATSywatCHk3g@mail.gmail.com>
Date:	Thu, 20 Jun 2013 22:35:25 +0800
From:	Bob Liu <lliubbo@...il.com>
To:	Seth Jennings <sjenning@...ux.vnet.ibm.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Nitin Gupta <ngupta@...are.org>,
	Minchan Kim <minchan@...nel.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	Robert Jennings <rcj@...ux.vnet.ibm.com>,
	Jenifer Hopper <jhopper@...ibm.com>,
	Mel Gorman <mgorman@...e.de>,
	Johannes Weiner <jweiner@...hat.com>,
	Rik van Riel <riel@...hat.com>,
	Larry Woodman <lwoodman@...hat.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Dave Hansen <dave@...1.net>, Joe Perches <joe@...ches.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Cody P Schafer <cody@...ux.vnet.ibm.com>,
	Hugh Dickens <hughd@...gle.com>,
	Paul Mackerras <paulus@...ba.org>,
	Linux-MM <linux-mm@...ck.org>,
	Linux-Kernel <linux-kernel@...r.kernel.org>,
	devel@...verdev.osuosl.org
Subject: Re: [PATCHv13 3/4] zswap: add to mm/

On Thu, Jun 20, 2013 at 10:23 PM, Seth Jennings
<sjenning@...ux.vnet.ibm.com> wrote:
> On Thu, Jun 20, 2013 at 05:42:04PM +0800, Bob Liu wrote:
>> > Just made a mmtests run of my own and got very different results:
>> >
>>
>> It's strange, I'll update to rc6 and try again.
>> By the way, are you using 824 hardware compressor instead of lzo?
>
> My results where using lzo software compression.
>

Thanks, and today I used another machine to test zswap.
The total ram size of that machine is around 4G.
This time the result is better:
                                               rc6                         rc6
                                             zswap                        base
Ops memcachetest-0M             14619.00 (  0.00%)          15602.00 (  6.72%)
Ops memcachetest-435M           14727.00 (  0.00%)          15860.00 (  7.69%)
Ops memcachetest-944M           12452.00 (  0.00%)          11812.00 ( -5.14%)
Ops memcachetest-1452M          12183.00 (  0.00%)           9829.00 (-19.32%)
Ops memcachetest-1961M          11953.00 (  0.00%)           9337.00 (-21.89%)
Ops memcachetest-2469M          11201.00 (  0.00%)           7509.00 (-32.96%)
Ops memcachetest-2978M           9738.00 (  0.00%)           5981.00 (-38.58%)
Ops io-duration-0M                  0.00 (  0.00%)              0.00 (  0.00%)
Ops io-duration-435M               10.00 (  0.00%)              6.00 ( 40.00%)
Ops io-duration-944M               19.00 (  0.00%)             19.00 (  0.00%)
Ops io-duration-1452M              31.00 (  0.00%)             26.00 ( 16.13%)
Ops io-duration-1961M              40.00 (  0.00%)             35.00 ( 12.50%)
Ops io-duration-2469M              45.00 (  0.00%)             43.00 (  4.44%)
Ops io-duration-2978M              58.00 (  0.00%)             53.00 (  8.62%)
Ops swaptotal-0M                56711.00 (  0.00%)              8.00 ( 99.99%)
Ops swaptotal-435M              19218.00 (  0.00%)           2101.00 ( 89.07%)
Ops swaptotal-944M              53233.00 (  0.00%)          98055.00 (-84.20%)
Ops swaptotal-1452M             52064.00 (  0.00%)         145624.00 (-179.70%)
Ops swaptotal-1961M             54960.00 (  0.00%)         153907.00 (-180.03%)
Ops swaptotal-2469M             57485.00 (  0.00%)         176340.00 (-206.76%)
Ops swaptotal-2978M             77704.00 (  0.00%)         182996.00 (-135.50%)
Ops swapin-0M                   24834.00 (  0.00%)              8.00 ( 99.97%)
Ops swapin-435M                  9038.00 (  0.00%)              0.00 (  0.00%)
Ops swapin-944M                 26230.00 (  0.00%)          42953.00 (-63.76%)
Ops swapin-1452M                25766.00 (  0.00%)          68440.00 (-165.62%)
Ops swapin-1961M                27258.00 (  0.00%)          68129.00 (-149.94%)
Ops swapin-2469M                28508.00 (  0.00%)          82234.00 (-188.46%)
Ops swapin-2978M                37970.00 (  0.00%)          89280.00 (-135.13%)
Ops minorfaults-0M            1460163.00 (  0.00%)         927966.00 ( 36.45%)
Ops minorfaults-435M           954058.00 (  0.00%)         936182.00 (  1.87%)
Ops minorfaults-944M           972818.00 (  0.00%)        1005956.00 ( -3.41%)
Ops minorfaults-1452M          966597.00 (  0.00%)        1035465.00 ( -7.12%)
Ops minorfaults-1961M          976158.00 (  0.00%)        1049441.00 ( -7.51%)
Ops minorfaults-2469M          967815.00 (  0.00%)        1051752.00 ( -8.67%)
Ops minorfaults-2978M          988712.00 (  0.00%)        1034615.00 ( -4.64%)
Ops majorfaults-0M               5899.00 (  0.00%)              9.00 ( 99.85%)
Ops majorfaults-435M             2684.00 (  0.00%)             67.00 ( 97.50%)
Ops majorfaults-944M             4380.00 (  0.00%)           5790.00 (-32.19%)
Ops majorfaults-1452M            4161.00 (  0.00%)           9222.00 (-121.63%)
Ops majorfaults-1961M            4435.00 (  0.00%)           8800.00 (-98.42%)
Ops majorfaults-2469M            4555.00 (  0.00%)          10541.00 (-131.42%)
Ops majorfaults-2978M            6182.00 (  0.00%)          11618.00 (-87.93%)


But the performance of the first machine I used whose total ram size
is 2G is still bad.
I need more time to summarize those testing results.

Maybe you can also have a try with lower total ram size.

--
Regards,
--Bob
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