Date: Tue, 27 Nov 2001 11:56:45 -0500 From: Mike Tancsa <mike@sentex.net> To: Luigi Rizzo <rizzo@aciri.org>, net@FreeBSD.ORG Subject: Re: Revised polling code (some stats) Message-ID: <5.1.0.14.0.20011127113111.04f0b390@marble.sentex.ca>
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Hi, just as an FYI, I did some simple tests using netperf of the polling
code. On first blush, it does look quite nice. I am going to try and
simulate what the effect is under network load while at the same time,
trying to bring up a BGP peer with a full view.
Machine A is a PIII 800 with a D-Link 4port NIC using the dc
driver. Connected to it was a PIV 1.5 845 chipset board with integrated
fxp running the server portion of netperf
On the PIII with the Dlink card I ran the tests only varying
net.xorp.polling: 0
vs
net.xorp.polling: 1
The other nice thing of course of the polling code that does not show up in
the figures below is the load average, which on the stream test at least
shows .
/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100
<idle> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+POLL <idle> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
/usr/local/netperf/netperf -t TCP_STREAM -l 60 -H 10.1.1.1 -i 10,3 -I 99,5
-- -s 57344 -S 57344 -m 4096
Recv Send Send
Socket Socket Message Elapsed
Size Size Size Time Throughput
bytes bytes bytes secs. 10^6bits/sec
57344 57344 4096 60.06 60.10 +POLL
57344 57344 4096 60.00 59.37
/usr/local/netperf/netperf -t TCP_STREAM -l 60 -H 10.1.1.1 -i 10,3 -I 99,5
-- -s 32768 -S 32768 -m 4096
Recv Send Send
Socket Socket Message Elapsed
Size Size Size Time Throughput
bytes bytes bytes secs. 10^6bits/sec
32768 32768 4096 59.99 61.31 +POLL
32768 32768 4096 60.16 60.73
/usr/local/netperf/netperf -t TCP_RR -l 60 -H 10.1.1.1 -i 10,3 -I 99,5 --
-r 1,1
Local /Remote
Socket Size Request Resp. Elapsed Trans.
Send Recv Size Size Time Rate
bytes Bytes bytes bytes secs. per sec
16384 16384 1 1 59.99 8260.80 +POLL
16384 16384 1 1 59.99 6072.08
/usr/local/netperf/netperf -t UDP_RR -l 60 -H 10.1.1.1 -i 10,3 -I 99,5 --
-r 1,1
Local /Remote
Socket Size Request Resp. Elapsed Trans.
Send Recv Size Size Time Rate
bytes Bytes bytes bytes secs. per sec
9216 42080 1 1 59.99 10398.39 +POLL
9216 42080 1 1 59.99 9248.39
/usr/local/netperf/netperf -t UDP_RR -l 60 -H 10.1.1.1 -i 10,3 -I 99,5 --
-r 516,4
UDP REQUEST/RESPONSE TEST to 10.1.1.1 : +/-2.5% @ 99% conf. : histogram
Local /Remote
Socket Size Request Resp. Elapsed Trans.
Send Recv Size Size Time Rate
bytes Bytes bytes bytes secs. per sec
9216 42080 516 4 59.99 5857.40 +POLL
9216 42080 516 4 59.99 5482.58
/usr/local/netperf/netperf -t UDP_STREAM -l 60 -H 10.1.1.1 -i 10,3 -I 99,5
-- -s 32768 -S 32768 -m 4096
UDP UNIDIRECTIONAL SEND TEST to 10.1.1.1 : +/-2.5% @ 99% conf. : histogram
Socket Message Elapsed Messages
Size Size Time Okay Errors Throughput
bytes bytes secs # # 10^6bits/sec
32768 4096 59.99 115161 10324576 62.90 +POLL
32768 59.99 114009 62.27 +POLL
32768 4096 59.99 108361 7401883 59.19
32768 59.99 108342 59.18
32768 1024 59.99 478638 13513083 65.36 +POLL
32768 59.99 478475 65.34 +POLL
32768 1024 59.99 452463 8759390 61.79
32768 59.99 451930 61.71
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