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Date: Mon, 28 Feb 2011 12:04:27 +0530
From: Krishna Kumar <krkumar2@...ibm.com>
To: rusty@...tcorp.com.au, davem@...emloft.net, mst@...hat.com
Cc: eric.dumazet@...il.com, arnd@...db.de, netdev@...r.kernel.org,
horms@...ge.net.au, avi@...hat.com, anthony@...emonkey.ws,
kvm@...r.kernel.org, Krishna Kumar <krkumar2@...ibm.com>
Subject: [PATCH 0/3] [RFC] Implement multiqueue (RX & TX) virtio-net
This patch series is a continuation of an earlier one that
implemented guest MQ TX functionality. This new patchset
implements both RX and TX MQ. Qemu changes are not being
included at this time solely to aid in easier review.
Compatibility testing with old/new combinations of qemu/guest
and vhost was done without any issues.
Some early TCP/UDP test results are at the bottom of this
post, I plan to submit more test results in the coming days.
Please review and provide feedback on what can improve.
Thanks!
Signed-off-by: Krishna Kumar <krkumar2@...ibm.com>
---
Test configuration:
Host: 8 Intel Xeon, 8 GB memory
Guest: 4 cpus, 2 GB memory
Each test case runs for 60 secs, results below are average over
two runs. Bandwidth numbers are in gbps. I have used default
netperf, and no testing/system tuning other than taskset each
vhost to 0xf (cpus 0-3). Comparison is testing original kernel
vs new kernel with #txqs=8 ("#" refers to number of netperf
sessions).
_______________________________________________________________________
TCP: Guest -> Local Host (TCP_STREAM)
# BW1 BW2 (%) SD1 SD2 (%) RSD1 RSD2 (%)
_______________________________________________________________________
1 7190 7170 (-.2) 0 0 (0) 3 4 (33.3)
2 8774 11235 (28.0) 3 3 (0) 16 14 (-12.5)
4 9753 15195 (55.7) 17 21 (23.5) 65 59 (-9.2)
8 10224 18265 (78.6) 71 115 (61.9) 251 240 (-4.3)
16 10749 18123 (68.6) 277 456 (64.6) 985 925 (-6.0)
32 11133 17351 (55.8) 1132 1947 (71.9) 3935 3831 (-2.6)
64 11223 17115 (52.4) 4682 7836 (67.3) 15949 15373 (-3.6)
128 11269 16986 (50.7) 19783 31505 (59.2) 66799 61759 (-7.5)
_______________________________________________________________________
Summary: BW: 37.6 SD: 61.2 RSD: -6.5
_______________________________________________________________________
TCP: Local Host -> Guest (TCP_MAERTS)
# BW1 BW2 (%) SD1 SD2 (%) RSD1 RSD2 (%)
_______________________________________________________________________
1 11490 10870 (-5.3) 0 0 (0) 2 2 (0)
2 10612 10554 (-.5) 2 3 (50.0) 12 12 (0)
4 10047 14320 (42.5) 13 16 (23.0) 53 53 (0)
8 9273 15182 (63.7) 56 84 (50.0) 228 233 (2.1)
16 9291 15853 (70.6) 235 390 (65.9) 934 965 (3.3)
32 9382 15741 (67.7) 969 1823 (88.1) 3868 4037 (4.3)
64 9270 14585 (57.3) 3966 8836 (122.7) 15415 17818 (15.5)
128 8997 14678 (63.1) 17024 36649 (115.2) 64933 72677 (11.9)
_______________________________________________________________________
SUM: BW: 24.8 SD: 114.6 RSD: 12.1
______________________________________________________
UDP: Local Host -> Guest (UDP_STREAM)
# BW1 BW2 (%) SD1 SD2 (%)
______________________________________________________
1 17236 16585 (-3.7) 1 1 (0)
2 16795 22693 (35.1) 5 6 (20.0)
4 13390 21502 (60.5) 37 36 (-2.7)
8 13261 24361 (83.7) 163 175 (7.3)
16 12772 23796 (86.3) 692 826 (19.3)
32 12832 23880 (86.0) 2812 2871 (2.0)
64 12779 24293 (90.1) 11299 11237 (-.5)
128 13006 24857 (91.1) 44778 43884 (-1.9)
______________________________________________________
Summary: BW: 37.1 SD: -1.2
--
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