> The mother board is a Supermicro H8DME-2 with one dual core Opteron
> installed. The networking is provided by the on board nVidia MCP55Pro chip.
>
> The RT test is done using netperf 2.4.3 with the server on an IBM LS20
> blade running RHEL4U2 and the Supermicro running netperf under RHEL5
> with 2.6.21-rc5-rt5.
> The Non-RT test was done on the exact same setup except 2.6.21-rc5-rt5
> was loaded on the SuperMicro board.
>
> Cyclesoak was used to measure CPU utilization in all cases.
>
>
>
> Here are the RT results
> ########################################################3
> ## 2.6.21-rc5-rt5
> #######################################################
> $ !netper
> netperf -l 100 -H 192.168.70.11 -t UDP_STREAM -- -m 1025
> UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
> 192.168.70.11 (192.168.70.11) port 0 AF_INET
> Socket Message Elapsed Messages
> Size Size Time Okay Errors Throughput
> bytes bytes secs # # 10^6bits/sec
>
> 126976 1025 100.00 8676376 0 711.46
> 135168 100.00 8676376 711.46
>
> ########## cyclesoak during test
> $ ./cyclesoak
> using 2 CPUs
> System load: -0.1%
> System load: 40.5%
> System load: 51.6%
> System load: 51.5%
> System load: 50.9%
> System load: 50.7%
> System load: 50.8%
> System load: 50.7%
> System load: 50.6%
>
> ######## top during test
> top - 13:26:48 up 8 min, 4 users, load average: 1.74, 0.46, 0.15
> Tasks: 149 total, 4 running, 145 sleeping, 0 stopped, 0 zombie
> Cpu(s): 0.7%us, 16.8%sy, 50.6%ni, 0.0%id, 0.0%wa, 25.6%hi, 6.3%si,
> 0.0%st
> Mem: 2035444k total, 465888k used, 1569556k free, 28840k buffers
> Swap: 3068372k total, 0k used, 3068372k free, 318668k cached
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 3865 eadi 39 19 6804 1164 108 R 100 0.1 0:38.25 cyclesoak
> 2715 root -51 -5 0 0 0 S 51 0.0 0:09.52 IRQ-8406
> 3867 eadi 25 0 6440 632 480 R 34 0.0 0:06.03
> netperf 19 root -51 0 0 0 0 S 13 0.0
> 0:02.33 softirq-net-tx/
> 3866 eadi 39 19 6804 1164 108 R 1 0.1 0:20.47 cyclesoak
> 3167 root 25 0 29888 1180 888 S 0 0.1 0:00.93 automount
> 3861 eadi 15 0 12712 1076 788 R 0 0.1 0:00.19 top
> 1 root 18 0 10308 668 552 S 0 0.0 0:00.67 init
> 2 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/0
> 3 root RT 0 0 0 0 S 0 0.0 0:00.00 posix_cpu_timer
> 4 root -51 0 0 0 0 S 0 0.0 0:00.00 softirq-high/0
> 5 root -51 0 0 0 0 S 0 0.0 0:00.00 softirq-timer/0
> 6 root -51 0 0 0 0 S 0 0.0 0:00.00 softirq-net-tx/
> 7 root -51 0 0 0 0 S 0 0.0 0:00.00 softirq-net-rx/
> 8 root -51 0 0 0 0 S 0 0.0 0:00.00 softirq-block/0
>
> ########################
> The baseline results:
> RHEL5 with 2.6.21-rc5 kernel
> ##############################
>
> $ netperf -l 100 -H 192.168.70.11 -t UDP_STREAM -- -m 1025
>
> UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
> 192.168.70.11 (192.168.70.11) port 0 AF_INET
> Socket Message Elapsed Messages
> Size Size Time Okay Errors Throughput
> bytes bytes secs # # 10^6bits/sec
>
> 126976 1025 100.00 11405485 0 935.24
> 135168 100.00 11405485 935.24
>
> #######################################
> $ ./cyclesoak
> using 2 CPUs
> System load: 7.6%
> System load: 29.6%
> System load: 29.6%
> System load: 28.9%
> System load: 24.9%
> System load: 25.0%
> System load: 24.8%
> System load: 24.9%
>
> #######################################
> top:top - 13:52:22 up 10 min, 6 users, load average: 1.46, 0.43, 0.17
> Tasks: 118 total, 4 running, 114 sleeping, 0 stopped, 0 zombie
> Cpu(s): 0.5%us, 9.8%sy, 75.7%ni, 0.0%id, 0.0%wa, 5.8%hi, 8.1%si,
> 0.0%st
> Mem: 2057200k total, 459128k used, 1598072k free, 29020k buffers
> Swap: 3068372k total, 0k used, 3068372k free, 318968k cached
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 3882 eadi 39 19 6804 1164 108 R 100 0.1 0:52.11 cyclesoak
> 3881 eadi 39 19 6804 1164 108 R 65 0.1 0:38.47 cyclesoak
> 3883 eadi 15 0 6436 632 480 R 35 0.0 0:18.26 netperf
> 3879 eadi 15 0 12580 1052 788 R 0 0.1 0:00.15 top
> 1 root 18 0 10308 664 552 S 0 0.0 0:00.48 init
> 2 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/0
> 3 root 34 19 0 0 0 S 0 0.0 0:00.01 ksoftirqd/0
> 4 root RT 0 0 0 0 S 0 0.0 0:00.00 watchdog/0
> 5 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/1
> 6 root 34 19 0 0 0 S 0 0.0 0:00.00 ksoftirqd/1
>
> Any thoughts on how to fix this?
>
> Thanks,
> -Dave
>
>
>
>
>
>
>
>
>
>
>
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