On 27 July 2014 13:42, George Neville-Neil <g...@neville-neil.com> wrote: > On 22 Jul 2014, at 20:30, Adrian Chadd wrote: > >> hi! >> >> You can use 'pmcstat -S CPU_CLK_UNHALTED_CORE -O pmc.out' (then ctrl-C >> it after say 5 seconds), which will log the data to pmc.out; >> then 'pmcannotate -k /boot/kernel pmc.out /boot/kernel/kernel' to find >> out where the most cpu cycles are being spent. >> > > Chiming in late, but don't you mean instruction-retired instead of > CPU_CLK_UNHALTED_CORE?
Nope. the hardware retires instructions in parallel. That gives a different indication of a different class of bottlenecks. -a _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
