* Eric Dumazet <dada1@xxxxxxxxxxxxx> wrote: > Ingo Molnar a écrit : >> * Eric Dumazet <dada1@xxxxxxxxxxxxx> wrote: >> >>> Before patch, time to run 8 millions of close(socket()) calls on 8 >>> CPUS was : >>> >>> real 0m27.496s >>> user 0m0.657s >>> sys 3m39.092s >>> >>> After patch : >>> >>> real 0m23.997s >>> user 0m0.682s >>> sys 3m11.193s >> >> cool :-) >> >> What would it take to get it down to: >> >>>> Cost if run one one cpu : >>>> >>>> real 0m1.561s >>>> user 0m0.092s >>>> sys 0m1.469s >> >> i guess asking for a wall-clock cost of 1.561/8 would be too much? :) >> > > It might be possible, depending on the level of hackery I am allowed > to inject in fs/dcache.c and fs/inode.c :) I think being able to open+close sockets in a scalable way is an undisputed prime-time workload on Linux. The numbers you showed look horrible. Once you can show how much faster it could go via hacks, it should only be a matter of time to achieve that safely and cleanly. > wall cost of 1.56 (each cpu runs one loop of one million iterations) (indeed.) Ingo -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
