David, Here is a rework of the select/poll patch. (I called this a v2 but we are continuing where we left off in v9 of the original series.)
One question: do we need in sock_poll() to test that sock->sk is not null? (Thanks to Willem de Bruijn for pointing this out.) When select or poll are used on a lot of sockets the sysctl value needs to be set higher than 50. For 300 sockets a setting of 100 works for me. For 1000 sockets a setting of 200 works well but the gain is very small, probably not worth it. I should mention that unlike the version we had in v9, with this version of the patch, LLS always performs better than no LLS. -Eliezer Change log: v2 - added POLL_LL flag, used to signal between the syscalls and sock_poll(). - add a separate ll_end_time() function to be used from poll. - slight reorder of sk_poll_ll so the timing primitives are not used when called from sock_poll(). - select/poll stop busy polling as soon as there is something to return to the user. Change log from the original LLS patch series: v9 - better mask testing in sock_poll(), reported by Eric Dumazet. v8 - split out udp and select/poll into separate patches. what used to be patch 2/5 is now three patches. v5 - added simple poll/select support -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
