On 06/09/2017 09:35 AM, Michal Hocko wrote: > On Fri 09-06-17 17:25:51, Laurent Dufour wrote: > [...] >> Thanks Michal for your feedback. >> >> I mostly focused on this database workload since this is the one where >> we hit the mmap_sem bottleneck when running on big node. On my usual >> victim node, I checked for basic usage like kernel build time, but I >> agree that's clearly not enough. >> >> I try to find details about the 'kbench' you mentioned, but I didn't get >> any valid entry. >> Would you please point me on this or any other bench tool you think will >> be useful here ? > > Sorry I meant kernbech (aka parallel kernel build). Other highly threaded > workloads doing a lot of page faults and address space modification > would be good to see as well. I wish I could give you much more > comprehensive list but I am not very good at benchmarks. > Laurent, Have you tried running the multi-fault microbenchmark by Kamezawa? It does threaded page faults in parallel. Peter ran that when he posted his specualtive page faults patches. https://lkml.org/lkml/2010/1/6/28 Thanks. Tim -- 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>
