From: Ingo Molnar <mingo@xxxxxxx> Date: Mon, 17 Nov 2008 19:49:51 +0100 > > * Ingo Molnar <mingo@xxxxxxx> wrote: > > 4> The place for the sock_rfree() hit looks a bit weird, and i'll > > investigate it now a bit more to place the real overhead point > > properly. (i already mapped the test-bit overhead: that comes from > > napi_disable_pending()) > > ok, here's a new set of profiles. (again for tbench 64-thread on a > 16-way box, with v2.6.28-rc5-19-ge14c8bf and with the kernel config i > posted before.) Again, do a non-NMI profile and the top (at least for me) looks like this: samples % app name symbol name 473 6.3928 vmlinux finish_task_switch 349 4.7169 vmlinux tcp_v4_rcv 327 4.4195 vmlinux U3copy_from_user 322 4.3519 vmlinux tl0_linux32 178 2.4057 vmlinux tcp_ack 170 2.2976 vmlinux tcp_sendmsg 167 2.2571 vmlinux U3copy_to_user That tcp_v4_rcv() hit is %98 on the wake_up() call it does. -- 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
