MCF5445X performance

[xiangbiaotong]

 I have tested  mcf54455 fei performance on m54455evb + linuxBsp using netperf-2.4.4.tar.gz. I used a ethernet cable connect linux pc to m54455evb ,so no other net devices can affect test result.test result here:

1. M54455EVB(server)<-->M54455EVB(client)（on single machine）: 83Mbits/s.

(on single machine ,first execute netserver,and then execute netperf -H 127.0.0.1)

2. M54455EVB(server,192.100.185.183)<-->linux pc (client,192.100.185.185):   23Mbits/s. 

(run netserver on m5445evb,run netperf -H 192.100.185.183 on pc linux)

3. M54455EVB(client,192.100.185.183)<-->linux pc(server,192.100.185.185):   12Mbits/s. 

(run netserver on linux pc,run netperf -H 192.100.185.185 on m54455evb)

But,I run netperf -H 192.100.185.185 on AT91RM9200+Linux2.6,the result is 60Mbit/s. AT91RM9200 run on 180Mhz(200mips),mcf5445x run on 266mhz(410mips).

I have update the patch (2008/08/08 )

Can you tell me why?

Please forgive my pool english.

[xiangbiaotong]

my result is(cpu:200mhz,memory:64m bytes):

top:

top - 00:30:01 up 30 min,  0 users,  load average: 0.04, 0.01, 0.00
Tasks:  20 total,   1 running,  19 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.7%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa, 99.3%hi,  0.0%si,  0.0%
st
Mem:     62568k total,     7320k used,    55248k free,        0k buffers

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND           
  364 0         20   0  3200  864  592 S  5.3  1.4   0:01.13 netperf           

vmstat: 

procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
 0  0      0  55320      0   4184    0    0     0     0  469  334  1 99  0  0

[mjlear]

That's interesting :smileyhappy: as it's pretty much the same as me. (I'm running at 266MHz with 256MB RAM). What version of kernel are you running on the target and have you applied any patches? Are you having general performance problems all round or is is just specific to networking?

[linuxfan]

I have worse result.

M54455EVB <--> M54455EVB 28. 71 10^6 bps

M54455EVB netserver <--> PC Suse Linux 2.6.28 netperf  9.45 10^6 bps

TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to localhost (127.0.0.1) port 0 AF_INET
Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^6bits/sec

 87380  16384  16384    10.02      28.71

TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 10.0.0.110 (10.0.0.110) port 0 AF_INET
Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^6bits/sec

 87380  16384  16384    10.10       9.45
 

[mjlear]

Can you get a measurement of cpu load under these test conditions? I too have run tests with netperf on the mcf54455 evb and from what I can see, netperf consumes virtually all the cpu resource. Furthermore, if I run a UDP test with netperf (or netcat) user space is totally starved such that the console is completely unresponsive. This really shouldn't be the case. Interestingly, running top from the procps package in ltib indicates that even when idling, cpu resource is at ~ 99% but this time seems to be spent doing hw interrupts:

top indicates:

top - 00:08:13 up 8 min,  1 user,  load average: 0.00, 0.02, 0.00
Tasks: 24 total, 1 running, 23 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.8%us, 0.0%sy, 0.0%ni, 0.0%id, 0.0%wa, 99.2%hi, 0.0%si, 0.0%st
Mem: 255320k total, 7736k used, 247584k free, 0k buffers
Swap: 0k total, 0k used, 0k free, 4280k cached

vmstat indicates:

procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
 2  0      0 247304      0   4280    0    0     0     0  153  210  1 99  0  0

Can you confirm if this is the same for you?

[xiangbiaotong]

Who can help me? I have spent four months on this project. I found this problem a few weeks ago.I don't known the reason of so low performance. If the reason is mcf5445x's problem,  I will give up this project. if the reason is linux bsp,I hope somebody can help me,tell me how to modify the bsp.