On Wed, Nov 30, 2016 at 04:06:12PM +0100, Jesper Dangaard Brouer wrote: > > > [...] > > > > This is the result from netperf running UDP_STREAM on localhost. It was > > > > selected on the basis that it is slab-intensive and has been the subject > > > > of previous SLAB vs SLUB comparisons with the caveat that this is not > > > > testing between two physical hosts. > > > > > > I do like you are using a networking test to benchmark this. Looking at > > > the results, my initial response is that the improvements are basically > > > too good to be true. > > > > > > > FWIW, LKP independently measured the boost to be 23% so it's expected > > there will be different results depending on exact configuration and CPU. > > Yes, noticed that, nice (which was a SCTP test) > https://lists.01.org/pipermail/lkp/2016-November/005210.html > > It is of-cause great. It is just strange I cannot reproduce it on my > high-end box, with manual testing. I'll try your test suite and try to > figure out what is wrong with my setup. > That would be great. I had seen the boost on multiple machines and LKP verifying it is helpful. > > > > Can you share how you tested this with netperf and the specific netperf > > > parameters? > > > > The mmtests config file used is > > configs/config-global-dhp__network-netperf-unbound so all details can be > > extrapolated or reproduced from that. > > I didn't know of mmtests: https://github.com/gormanm/mmtests > > It looks nice and quite comprehensive! :-) > Thanks. > > > e.g. > > > How do you configure the send/recv sizes? > > > > Static range of sizes specified in the config file. > > I'll figure it out... reading your shell code :-) > > export NETPERF_BUFFER_SIZES=64,128,256,1024,2048,3312,4096,8192,16384 > https://github.com/gormanm/mmtests/blob/master/configs/config-global-dhp__network-netperf-unbound#L72 > > I see you are using netperf 2.4.5 and setting both the send an recv > size (-- -m and -M) which is fine. > Ok. > I don't quite get why you are setting the socket recv size (with -- -s > and -S) to such a small number, size + 256. > Maybe I missed something at the time I wrote that but why would it need to be larger? -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>