On 05/22/2013 10:55 PM, Mike Galbraith wrote:
> On Wed, 2013-05-22 at 17:25 +0800, Michael Wang wrote:
> 
>> I've not test the hackbench with wakeup-buddy before, will do it this
>> time, I suppose the 15% illegal income will suffered, anyway, it's
>> illegal :)
> 

Thanks, Mike, these are very helpful data ;-)

> On a 4 socket 40 core (+SMT) box, hackbench wasn't too happy.

I'm not sure whether this is caused by the SOFT IRQ case, I have some
idea in mind which may could help to solve that issue, but if this huge
regression is caused by other reasons...

Anyway, I will rework on the idea and let's see whether we could make
things better :)

Regards,
Michael Wang

> 
> defaultx = wakeup buddy
> 
> tbench 30 localhost
>                          1       5       10       20       40       80      
> 160      320
> 3.10.0-default      188.13  953.03  1860.03  3180.93  5378.34 10826.06 
> 11342.90 11651.30
> 3.10.0-defaultx     187.26  934.55  1859.30  3160.29  5016.35 12477.15 
> 12567.05 12068.47
> 
> hackbench -l 400 -g 400
> 3.10.0-default     Time: 3.919    4.250     4.116
> 3.10.0-defaultx    Time: 9.074   10.985     9.849
> 
> aim7 compute
> AIM Multiuser Benchmark - Suite VII     "1.1"   3.10.0-default     AIM 
> Multiuser Benchmark - Suite VII     "1.1"   3.10.0-defaultx
> 
> Tasks   Jobs/Min        JTI     Real    CPU     Jobs/sec/task      Tasks   
> Jobs/Min        JTI     Real    CPU     Jobs/sec/task
> 1       428.0           100     14.2    4.1     7.1328             1       
> 428.9           100     14.1    4.1     7.1479
> 1       417.9           100     14.5    4.1     6.9655             1       
> 430.4           100     14.1    4.0     7.1733
> 1       427.7           100     14.2    4.2     7.1277             1       
> 424.7           100     14.3    4.2     7.0778
> 5       2350.7          99      12.9    13.8    7.8355             5       
> 2156.6          99      14.1    19.8    7.1886
> 5       2422.1          99      12.5    12.1    8.0735             5       
> 2155.0          99      14.1    19.7    7.1835
> 5       2189.3          98      13.8    18.3    7.2977             5       
> 2108.6          99      14.4    21.4    7.0285
> 10      4515.6          93      13.4    27.6    7.5261             10      
> 4529.1          96      13.4    29.5    7.5486
> 10      4708.6          96      12.9    24.3    7.8477             10      
> 4597.9          96      13.2    26.9    7.6631
> 10      4636.6          96      13.1    25.7    7.7276             10      
> 5197.3          98      11.7    14.8    8.6621
> 20      8053.2          95      15.1    78.1    6.7110             20      
> 9431.9          98      12.8    49.1    7.8599
> 20      8250.5          92      14.7    67.5    6.8754             20      
> 7973.7          97      15.2    93.4    6.6447
> 20      8178.1          97      14.8    78.5    6.8151             20      
> 8145.2          95      14.9    78.4    6.7876
> 40      17413.8         94      13.9    88.6    7.2557             40      
> 16312.2         92      14.9    115.6   6.7968
> 40      16775.1         93      14.5    111.6   6.9896             40      
> 17070.4         94      14.2    110.6   7.1127
> 40      16031.7         93      15.1    147.1   6.6799             40      
> 17578.0         94      13.8    96.9    7.3241
> 80      33666.7         95      14.4    138.4   7.0139             80      
> 33854.7         96      14.3    177.9   7.0531
> 80      33949.6         97      14.3    128.0   7.0728             80      
> 34164.9         96      14.2    146.4   7.1177
> 80      35752.2         96      13.6    159.1   7.4484             80      
> 33807.5         96      14.3    127.6   7.0432
> 160     74814.8         98      13.0    149.8   7.7932             160     
> 75162.8         98      12.9    148.6   7.8295
> 160     74015.3         97      13.1    149.5   7.7099             160     
> 74642.0         98      13.0    168.2   7.7752
> 160     73621.9         98      13.2    146.3   7.6689             160     
> 75572.9         98      12.8    163.6   7.8722
> 320     139210.3        96      13.9    280.1   7.2505             320     
> 139010.8        97      14.0    282.4   7.2401
> 320     135135.9        96      14.3    277.8   7.0383             320     
> 139611.2        96      13.9    282.2   7.2714
> 320     139110.5        96      13.9    280.4   7.2453             320     
> 138514.3        97      14.0    281.0   7.2143
> 640     223538.9        98      17.4    577.2   5.8213             640     
> 224704.5        95      17.3    567.3   5.8517
> 640     224055.5        97      17.3    575.7   5.8348             640     
> 222385.3        95      17.4    580.1   5.7913
> 640     225488.4        96      17.2    566.3   5.8721             640     
> 225882.4        93      17.2    563.0   5.8824
> 
> 
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