On Thu, May 05, 2011 at 08:57:13PM +0530, Krishna Kumar2 wrote: > "Michael S. Tsirkin" <mst@xxxxxxxxxx> wrote on 05/05/2011 02:34:39 PM: > > > > Do I need to apply all the patches and simply test? > > > > > > Thanks, > > > > > > - KK > > > > Exactly. You can also try to tune the threshold > > for interrupts as well. > > I haven't tuned the threshhold, it is left it at 3/4. I ran > the new qemu/vhost/guest, and the results for 1K, 2K and 16K > are below. Note this is a different kernel version from my > earlier test results. So, f.e., BW1 represents 2.6.39-rc2, > the original kernel; while BW2 represents 2.6.37-rc5 (MST's > kernel). Weird. My kernel is actually 2.6.39-rc2. So which is which? > This also isn't with the fixes you have sent just > now. I will get a run with that either late tonight or > tomorrow. Shouldn't affect anything performance-wise. > ________________________________________________________ > I/O size: 1K > # BW1 BW2 (%) SD1 SD2 (%) > ________________________________________________________ > 1 1723 3016 (75.0) 4.7 2.6 (-44.6) > 2 3223 6712 (108.2) 18.0 7.1 (-60.5) > 4 7223 8258 (14.3) 36.5 24.3 (-33.4) > 8 8689 7943 (-8.5) 131.5 101.6 (-22.7) > 16 8059 7398 (-8.2) 578.3 406.4 (-29.7) > 32 7758 7208 (-7.0) 2281.4 1574.7 (-30.9) > 64 7503 7155 (-4.6) 9734.0 6368.0 (-34.5) > 96 7496 7078 (-5.5) 21980.9 15477.6 (-29.5) > 128 7389 6900 (-6.6) 40467.5 26031.9 (-35.6) > ________________________________________________________ > Summary: BW: (4.4) SD: (-33.5) > > ________________________________________________________ > I/O size: 2K > # BW1 BW2 (%) SD1 SD2 (%) > ________________________________________________________ > 1 1608 4968 (208.9) 5.0 1.3 (-74.0) > 2 3354 6974 (107.9) 18.6 4.9 (-73.6) > 4 8234 8344 (1.3) 35.6 17.9 (-49.7) > 8 8427 7818 (-7.2) 103.5 71.2 (-31.2) > 16 7995 7491 (-6.3) 410.1 273.9 (-33.2) > 32 7863 7149 (-9.0) 1678.6 1080.4 (-35.6) > 64 7661 7092 (-7.4) 7245.3 4717.2 (-34.8) > 96 7517 6984 (-7.0) 15711.2 9838.9 (-37.3) > 128 7389 6851 (-7.2) 27121.6 18255.7 (-32.6) > ________________________________________________________ > Summary: BW: (6.0) SD: (-34.5) > > ________________________________________________________ > I/O size: 16K > # BW1 BW2 (%) SD1 SD2 (%) > ________________________________________________________ > 1 6684 7019 (5.0) 1.1 1.1 (0) > 2 7674 7196 (-6.2) 5.0 4.8 (-4.0) > 4 7358 8032 (9.1) 21.3 20.4 (-4.2) > 8 7393 8015 (8.4) 82.7 82.0 (-.8) > 16 7958 8366 (5.1) 283.2 310.7 (9.7) > 32 7792 8113 (4.1) 1257.5 1363.0 (8.3) > 64 7673 8040 (4.7) 5723.1 5812.4 (1.5) > 96 7462 7883 (5.6) 12731.8 12119.8 (-4.8) > 128 7338 7800 (6.2) 21331.7 21094.7 (-1.1) > ________________________________________________________ > Summary: BW: (4.6) SD: (-1.5) > > Thanks, > > - KK -- 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
