Re: regression with poll(2)

On Mon, 2012-08-20 at 10:04 +0100, Mel Gorman wrote:

Can the following patch be tested please? It is reported to fix an fio
regression that may be similar to what you are experiencing but has not
been picked up yet.

-

This seems to help here.

Boot your machine with "mem=768M" or a bit less depending on your setup,
and try a netperf.

-> before patch :

# netperf
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
localhost.localdomain () port 0 AF_INET
Recv   Send    Send                          
Socket Socket  Message  Elapsed              
Size   Size    Size     Time     Throughput  
bytes  bytes   bytes    secs.    10^6bits/sec  

 87380  16384  16384    14.00       6.05   

-> after patch :

Recv   Send    Send                          
Socket Socket  Message  Elapsed              
Size   Size    Size     Time     Throughput  
bytes  bytes   bytes    secs.    10^6bits/sec  

 87380  16384  16384    10.00    18509.73