Re: zram: per-cpu compression streams

[Sergey Senozhatsky]

Hello Minchan,

On (03/31/16 15:34), Sergey Senozhatsky wrote:
> > I tested with you suggested parameter.
> > In my side, win is better compared to my previous test but it seems
> > your test is so fast. IOW, filesize is small and loops is just 1.
> > Please test filesize=500m loops=10 or 20.

fio
- loops=10
- buffer_pattern=0xbadc0ffee

zram 6G. no intel p-state, deadline IO scheduler, no lockdep (no lock debugging).


test            8 streams        per-cpu

#jobs1                         	                
READ:           4118.2MB/s	 4105.3MB/s
READ:           3487.7MB/s	 3624.9MB/s
WRITE:          2197.8MB/s	 2305.1MB/s
WRITE:          1776.2MB/s	 1887.5MB/s
READ:           736589KB/s	 745648KB/s
WRITE:          736353KB/s	 745409KB/s
READ:           679279KB/s	 686559KB/s
WRITE:          679093KB/s	 686371KB/s
#jobs2                         	                
READ:           6924.6MB/s	 7160.2MB/s
READ:           6213.2MB/s	 6247.1MB/s
WRITE:          2510.3MB/s	 3680.1MB/s
WRITE:          2286.2MB/s	 3153.9MB/s
READ:           1163.1MB/s	 1333.7MB/s
WRITE:          1163.4MB/s	 1332.2MB/s
READ:           1122.9MB/s	 1240.3MB/s
WRITE:          1121.9MB/s	 1239.2MB/s
#jobs3                         	                
READ:           10304MB/s	 10424MB/s
READ:           9014.5MB/s	 9014.5MB/s
WRITE:          3883.9MB/s	 5373.8MB/s
WRITE:          3549.1MB/s	 4576.4MB/s
READ:           1704.4MB/s	 1916.8MB/s
WRITE:          1704.9MB/s	 1915.9MB/s
READ:           1603.5MB/s	 1806.8MB/s
WRITE:          1598.8MB/s	 1800.8MB/s
#jobs4                         	                
READ:           13509MB/s	 12792MB/s
READ:           10899MB/s	 11434MB/s
WRITE:          4027.2MB/s	 6272.8MB/s
WRITE:          3902.1MB/s	 5389.2MB/s
READ:           2090.9MB/s	 2344.4MB/s
WRITE:          2085.2MB/s	 2337.1MB/s
READ:           1968.1MB/s	 2185.9MB/s
WRITE:          1969.5MB/s	 2186.4MB/s
#jobs5                         	                
READ:           12634MB/s	 11607MB/s
READ:           9932.7MB/s	 9980.6MB/s
WRITE:          4275.8MB/s	 5844.3MB/s
WRITE:          4210.1MB/s	 5262.3MB/s
READ:           1995.6MB/s	 2211.4MB/s
WRITE:          1988.4MB/s	 2203.4MB/s
READ:           1930.1MB/s	 2191.8MB/s
WRITE:          1929.8MB/s	 2190.3MB/s
#jobs6                         	                
READ:           12270MB/s	 13012MB/s
READ:           11221MB/s	 10815MB/s
WRITE:          4643.4MB/s	 6090.9MB/s
WRITE:          4373.6MB/s	 5772.8MB/s
READ:           2232.6MB/s	 2358.4MB/s
WRITE:          2233.4MB/s	 2359.2MB/s
READ:           2082.6MB/s	 2285.8MB/s
WRITE:          2075.9MB/s	 2278.1MB/s
#jobs7                         	                
READ:           13617MB/s	 14172MB/s
READ:           12290MB/s	 11734MB/s
WRITE:          5077.3MB/s	 6315.7MB/s
WRITE:          4719.4MB/s	 5825.1MB/s
READ:           2379.8MB/s	 2523.7MB/s
WRITE:          2373.7MB/s	 2516.7MB/s
READ:           2287.9MB/s	 2362.4MB/s
WRITE:          2283.9MB/s	 2358.2MB/s
#jobs8                         	                
READ:           15130MB/s	 15533MB/s
READ:           12952MB/s	 13077MB/s
WRITE:          5586.6MB/s	 7108.2MB/s
WRITE:          5233.5MB/s	 6591.3MB/s
READ:           2541.2MB/s	 2709.2MB/s
WRITE:          2544.6MB/s	 2713.2MB/s
READ:           2450.6MB/s	 2590.7MB/s
WRITE:          2449.4MB/s	 2589.3MB/s
#jobs9                         	                
READ:           13480MB/s	 13909MB/s
READ:           12389MB/s	 12000MB/s
WRITE:          5266.8MB/s	 6594.9MB/s
WRITE:          4971.6MB/s	 6442.2MB/s
READ:           2464.9MB/s	 2470.9MB/s
WRITE:          2482.7MB/s	 2488.8MB/s
READ:           2171.9MB/s	 2402.2MB/s
WRITE:          2174.9MB/s	 2405.5MB/s
#jobs10                        	                
READ:           14647MB/s	 14667MB/s
READ:           11765MB/s	 12032MB/s
WRITE:          5248.7MB/s	 6740.4MB/s
WRITE:          4779.8MB/s	 5822.8MB/s
READ:           2448.8MB/s	 2585.3MB/s
WRITE:          2449.4MB/s	 2585.9MB/s
READ:           2290.5MB/s	 2409.1MB/s
WRITE:          2290.2MB/s	 2409.7MB/s

	-ss