Avi Kivity wrote: > Anthony Liguori wrote: > > [updated patch] > > Applied. > > >> Hard to say exactly because of the noise. I did two runs of 4 >> test/vmexit: >> >> Before 4091, 4194, 4559, 4439 >> After: 3979, 4324, 3918, 3910 >> >> So there's definitely a speedup, but probably only 100-200 cycles. >> >> > > Running on an idle, headless server with the vcpu pinned reduces > variability to a few cycles in the after case. Strangely, the > variability is high in the before case. I get a similar disappointing > result of 100-200 cycles. >
I previously measured how long fx_save/fx_restore took and it was right around 150 cycles on AMD. Regards, Anthony Liguori ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
