On 06/01/2011 12:32 AM, Sasha Levin wrote:
> On Tue, 2011-05-31 at 10:18 +0300, Pekka Enberg wrote:
>> On Tue, May 31, 2011 at 2:53 AM, Asias He <asias.hejun@xxxxxxxxx> wrote:
>>> TAP based network performance with ioeventfd
>>
>> Heh, so how did it look _before_ ioeventfd? Did performance improve
>> and how much?
>
> Asias, did you use TCP or UDP values as bandwidth in your previous test?
>
These commit log have the performance test result before ioeventfd. But
the UDP one is missing.
commit 739ddbb3b0fe52aa90a84727a6e90da37ce7661b
commit 4ed38b41fc034cfb51fec2004f523fe98faa27f6
Netpef test shows this patch changes:
the host to guest bandwidth
from 2866.27 Mbps (cpu 33.96%) to 5548.87 Mbps (cpu 53.87%),
the guest to host bandwitdth
form 1408.86 Mbps (cpu 99.9%) to 1301.29 Mbps (cpu 99.9%).
Anyway, I did another test and post the result here:
Test shows host -> guest TCP performance drops from 6736.04 to 5562.25.
guest -> host TCP performance dumps from 1572.51 to 1731.55.
---------------------------------------------------------------
TAP based network performance *with* ioeventfd with
commit 6dfc8581f14d355a89e7edaf4394ee8c69177f1f
---------------------------------------------------------------
(host -> guest)
hj:~# netperf -c -t TCP_STREAM -H guest
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to guest
(192.168.33.15) port 0 AF_INET : demo
Recv Send Send Utilization Service
Demand
Socket Socket Message Elapsed Send Recv Send Recv
Size Size Size Time Throughput local remote local
remote
bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB
87380 16384 16384 10.00 5562.25 45.74 -1.00 2.694
-1.000
hj:~# netperf -c -t UDP_STREAM -H guest
UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
guest (192.168.33.15) port 0 AF_INET : demo
Socket Message Elapsed Messages CPU Service
Size Size Time Okay Errors Throughput Util Demand
bytes bytes secs # # 10^6bits/sec % SU us/KB
114688 65507 10.00 275048 0 14413.5 71.65 11.516
110592 10.00 38904 2038.7 -1.00 -1.000
(guest-> host)
root@sid2:~# netperf -c -t TCP_STREAM -H host
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to host
(192.168.33.2) port 0 AF_INET : demo
Recv Send Send Utilization Service
Demand
Socket Socket Message Elapsed Send Recv Send Recv
Size Size Size Time Throughput local remote local
remote
bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB
87380 16384 16384 10.00 1731.55 99.30 -1.00 4.698
-1.000
root@sid2:~# netperf -c -t UDP_STREAM -H host
UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
host (192.168.33.2) port 0 AF_INET : demo
Socket Message Elapsed Messages CPU Service
Size Size Time Okay Errors Throughput Util Demand
bytes bytes secs # # 10^6bits/sec % SU us/KB
110592 65507 10.00 134084 0 7026.4 99.80 1.169
114688 10.00 133473 6994.4 -1.00 -1.000
---------------------------------------------------------------
TAP based network performance *without* ioeventfd with
commit dd2e19aee64ad93d170fc7f285c7072aa4e360a0
---------------------------------------------------------------
(host -> guest)
hj:~# netperf -c -t TCP_STREAM -H guest
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to guest
(192.168.33.15) port 0 AF_INET : demo
Recv Send Send Utilization Service
Demand
Socket Socket Message Elapsed Send Recv Send Recv
Size Size Size Time Throughput local remote local
remote
bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB
87380 16384 16384 10.00 6736.04 39.58 -1.00 1.925
-1.000
hj:~# netperf -c -t UDP_STREAM -H guest
UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
guest (192.168.33.15) port 0 AF_INET : demo
Socket Message Elapsed Messages CPU Service
Size Size Time Okay Errors Throughput Util Demand
bytes bytes secs # # 10^6bits/sec % SU us/KB
112640 65507 10.00 289263 0 15158.4 63.30 4.832
110592 10.00 81910 4292.4 -1.00 -1.000
(guest-> host)
root@sid2:~# netperf -c -t TCP_STREAM -H host
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to host
(192.168.33.2) port 0 AF_INET : demo
Recv Send Send Utilization Service
Demand
Socket Socket Message Elapsed Send Recv Send Recv
Size Size Size Time Throughput local remote local
remote
bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB
87380 16384 16384 10.00 1572.51 99.80 -1.00 5.199
-1.000
root@sid2:~# netperf -c -t UDP_STREAM -H host
UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
host (192.168.33.2) port 0 AF_INET : demo
Socket Message Elapsed Messages CPU Service
Size Size Time Okay Errors Throughput Util Demand
bytes bytes secs # # 10^6bits/sec % SU us/KB
110592 65507 10.00 117100 0 6136.4 99.90 1.335
112640 10.00 117023 6132.4 -1.00 -1.000
--
Best Regards,
Asias He
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