Comment 7 for bug 1521053

non patched kernel perf stat

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[ 3] local 10.13.0.4 port 36554 connected with 104.40.129.48 port 8042
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-377.9 sec 100 MBytes 0.26 MBytes/sec

 Performance counter stats for 'iperf -c 104.40.129.48 -f M -p 8042 -n 100M':

        452.813718 task-clock (msec) # 0.001 CPUs utilized
                   38287 context-switches # 0.085 M/sec
                          11 cpu-migrations # 0.024 K/sec
                        151 page-faults # 0.333 K/sec
                            0 cycles # 0.000 GHz
                            0 stalled-cycles-frontend # 0.00% frontend cycles idle
                            0 stalled-cycles-backend # 0.00% backend cycles idle
                            0 instructions
                            0 branches # 0.000 K/sec
                            0 branch-misses # 0.000 K/sec

     377.932572800 seconds time elapsed

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patched kernel perf stat

[ 3] local 10.23.0.4 port 45723 connected with 40.115.34.62 port 8042
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 0.9 sec 100 MBytes 106 MBytes/sec

 Performance counter stats for 'iperf -c 40.115.34.62 -f M -p 8042 -n 100M':

         30.442426 task-clock (msec) # 0.031 CPUs utilized
                      206 context-switches # 0.007 M/sec
                           3 cpu-migrations # 0.099 K/sec
                      154 page-faults # 0.005 M/sec
                           0 cycles # 0.000 GHz
                           0 stalled-cycles-frontend # 0.00% frontend cycles idle
                           0 stalled-cycles-backend # 0.00% backend cycles idle
                           0 instructions
                           0 branches # 0.000 K/sec
                           0 branch-misses # 0.000 K/sec

       0.997563300 seconds time elapsed

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