On 03/20/2012 08:37 AM, Takuya Yoshikawa wrote: > On Thu, 15 Mar 2012 15:46:31 +0200 > Avi Kivity <avi@xxxxxxxxxx> wrote: > > > You can look at what's happening by doing > > > > perf record -a -f > > perf report > > > > using the TUI, select 'annotate rmap_get_next' > > > > You should see where the time is spent. > > > > Since the default sampling rate was not enough to get consistent numbers, > I raised the frequency to 50K/sec; so there was surely some overheads > during that sampling. > > From the result below, it seems to be the prologue and epilogue on which > we spent most of our time. > > I can only assume that the cpu is processing these instructions perfectly and each is taking 1 cycle (or less). I don't see how else we can arrive at such results. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
