Hi,

I have a 8 core (4 core and HT enabled) machine to test nginx. In my
configuration file

worker_processes 8;

events {
worker_connections 30000;
}

I have done a simple test on that 4 core here is mpstat -P ALL 1 output

05:08:35 PM CPU %user %nice %sys %iowait %irq %soft
%steal %idle intr/s
05:08:36 PM all 4.12 0.00 7.62 2.12 0.25 6.99
0.00 78.90 12902.00
05:08:36 PM 0 19.00 0.00 17.00 0.00 0.00 1.00
0.00 63.00 1001.00
05:08:36 PM 1 1.00 0.00 2.00 0.00 0.00 0.00
0.00 97.00 0.00
05:08:36 PM 2 1.00 0.00 4.00 6.00 0.00 0.00
0.00 89.00 25.00
05:08:36 PM 3 1.00 0.00 1.00 0.00 0.00 0.00
0.00 98.00 0.00
05:08:36 PM 4 7.92 0.00 23.76 0.00 0.00 1.98
0.00 66.34 0.00
05:08:36 PM 5 0.00 0.00 3.03 0.00 0.00 0.00
0.00 96.97 1.00
05:08:36 PM 6 0.99 0.00 2.97 9.90 0.00 0.00
0.00 86.14 0.00
05:08:36 PM 7 2.02 0.00 7.07 0.00 2.02 52.53
0.00 36.36 11875.00

05:08:36 PM CPU %user %nice %sys %iowait %irq %soft
%steal %idle intr/s
05:08:37 PM all 1.75 0.00 5.24 1.00 0.12 6.74
0.00 85.14 9524.24
05:08:37 PM 0 0.00 0.00 0.00 0.00 0.00 0.00
0.00 100.00 1011.11
05:08:37 PM 1 0.00 0.00 0.00 0.00 0.00 0.00
0.00 100.00 0.00
05:08:37 PM 2 0.00 0.00 0.00 0.00 0.00 0.00
0.00 100.00 7.07
05:08:37 PM 3 2.97 0.00 7.92 0.00 0.00 0.00
0.00 89.11 0.00
05:08:37 PM 4 0.00 0.00 0.00 0.00 0.00 0.00
0.00 100.00 0.00
05:08:37 PM 5 0.00 0.00 0.00 0.00 0.00 0.00
0.00 100.00 0.00
05:08:37 PM 6 0.00 0.00 5.00 9.00 0.00 0.00
0.00 86.00 0.00
05:08:37 PM 7 10.89 0.00 28.71 0.00 0.99 53.47
0.00 5.94 8504.04

05:08:37 PM CPU %user %nice %sys %iowait %irq %soft
%steal %idle intr/s
05:08:38 PM all 2.75 0.00 5.25 0.00 0.12 7.00
0.00 84.88 8087.13
05:08:38 PM 0 8.91 0.00 10.89 0.00 0.00 0.99
0.00 79.21 991.09
05:08:38 PM 1 0.00 0.00 0.00 0.00 0.00 0.00
0.00 100.00 0.00
05:08:38 PM 2 0.00 0.00 2.00 0.00 0.00 0.00
0.00 98.00 0.00
05:08:38 PM 3 3.00 0.00 7.00 0.00 0.00 0.00
0.00 90.00 0.00
05:08:38 PM 4 2.00 0.00 5.00 0.00 0.00 0.00
0.00 93.00 0.00
05:08:38 PM 5 0.00 0.00 0.00 0.00 0.00 0.00
0.00 100.00 0.99
05:08:38 PM 6 0.00 0.00 0.00 0.00 0.00 0.00
0.00 100.00 0.00
05:08:38 PM 7 7.00 0.00 17.00 0.00 1.00 55.00
0.00 20.00 7095.05

05:08:38 PM CPU %user %nice %sys %iowait %irq %soft
%steal %idle intr/s
05:08:39 PM all 1.12 0.00 3.62 0.00 0.12 7.86
0.00 87.28 9617.00
05:08:39 PM 0 1.00 0.00 0.00 0.00 0.00 0.00
0.00 99.00 1001.00
05:08:39 PM 1 0.00 0.00 0.00 0.00 0.00 0.00
0.00 100.00 0.00
05:08:39 PM 2 0.00 0.00 0.00 0.00 0.00 0.00
0.00 100.00 0.00
05:08:39 PM 3 2.00 0.00 7.00 0.00 0.00 1.00
0.00 90.00 0.00
05:08:39 PM 4 0.00 0.00 0.00 0.00 0.00 0.00
0.00 100.00 0.00
05:08:39 PM 5 0.00 0.00 0.00 0.00 0.00 0.00
0.00 100.00 0.00
05:08:39 PM 6 0.00 0.00 1.00 0.00 0.00 0.00
0.00 99.00 0.00
05:08:39 PM 7 6.06 0.00 21.21 0.00 1.01 62.63
0.00 9.09 8617.00

As you can see nginx only use one core not all of them even if I state
worker_processes 8;

I have used nginx-0.7.64 and used centos 5.4 compiled using just
../configure && make && make install. I have read that nginx supports
multiple cpu but as far as I see from mpstat output it doesn't
Can anyone englighten me about that?

Regards.

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