On Wednesday 17 April 2013 19:38:46 Fabio M. Di Nitto wrote: > On 4/17/2013 6:41 PM, José Orlando Pereira wrote: > > On Wednesday 17 April 2013 17:38:40 Fabio M. Di Nitto wrote: > >> > >> The patch is better. > >> > >> Did you verify the performance impact of switching from static to malloc? > >> > >> there is a test/cpgbench you can use. > > > > Actually cpgbench doesn't show the overhead, as it uses CS_DISPATCH_BLOCKING. After > > changing the following in cpgbench.c: > > > > - cpg_dispatch (handle, CS_DISPATCH_BLOCKING); > > + while(1) cpg_dispatch (handle, CS_DISPATCH_ONE); > > > > I'm getting mixed results (worse for 64 bytes, better but unstable for 8k > > and 40k). I'll investigate further and let you know. > > Ok, try the basic: > > CS_DISPATCH_ONE with|without your patch and see if you notice the same > mixed results (might be that we need to adapt the test suite to measure > your patch). That's what I have been doing. Using CS_DISPATCH_ONE in a loop and confirming that there are no errors reported. Without the patch: 1274216 messages received 64 bytes per write 10.000 Seconds runtime 127420.504 TP/s 8.155 MB/s. 913165 messages received 320 bytes per write 10.000 Seconds runtime 91313.158 TP/s 29.220 MB/s. 388160 messages received 1600 bytes per write 10.000 Seconds runtime 38815.282 TP/s 62.104 MB/s. 119352 messages received 8000 bytes per write 10.000 Seconds runtime 11935.158 TP/s 95.481 MB/s. 31492 messages received 40000 bytes per write 10.000 Seconds runtime 3149.188 TP/s 125.968 MB/s. 7520 messages received 200000 bytes per write 10.000 Seconds runtime 752.097 TP/s 150.419 MB/s. 1446 messages received 1000000 bytes per write 10.000 Seconds runtime 144.599 TP/s 144.599 MB/s. With the patch: 534997 messages received 64 bytes per write 10.000 Seconds runtime 53498.500 TP/s 3.424 MB/s. 532639 messages received 320 bytes per write 10.000 Seconds runtime 53263.052 TP/s 17.044 MB/s. 516788 messages received 1600 bytes per write 10.000 Seconds runtime 51678.919 TP/s 82.686 MB/s. 501374 messages received 8000 bytes per write 10.000 Seconds runtime 50137.505 TP/s 401.100 MB/s. 517638 messages received 40000 bytes per write 10.000 Seconds runtime 51763.934 TP/s 2070.557 MB/s. 152837 messages received 200000 bytes per write 10.000 Seconds runtime 15283.630 TP/s 3056.726 MB/s. 1343 messages received 1000000 bytes per write 10.000 Seconds runtime 134.299 TP/s 134.299 MB/s. I'm still trying to understand why. -- Jose Orlando Pereira
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