Control: tag 820622 -moreinfo On 2016-04-28, Ben Hutchings wrote:
> Could you test with turbo_mode re-enabled and with this patch applied? > > Also could you test network receive throughput (e.g. with netperf -t > TCP_STREAM, sending *to* the RPi) in these three different > configurations: Ok, if I understood you correctly... Installed netperf on another machine, and ran: netperf -t TCP_STREAM 10.0.0.50 Where 10.0.0.50 is the raspberry pi 2. Ran netperf twice for each combination, rebooting the raspberry pi 2 between changes in turbo_mode or kernel. Double-checked /sys/module/smsc95xx/parameters/turbo_mode contained N when booted with turbo_mode=0, and Y when turbo_mode=1. To my untrained eye, doesn't look like a significant difference between any of the modes. None of them triggered the kernel messages that prompted the bug report. > 1. turbo_mode=0 MIGRATED TCP STREAM TEST from 0.0.0.0 () port 0 AF_INET to localhost () port 0 AF_INET : demo Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.02 1781.22 MIGRATED TCP STREAM TEST from 0.0.0.0 () port 0 AF_INET to localhost () port 0 AF_INET : demo Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.02 1847.21 > 2. turbo_mode=1, current driver MIGRATED TCP STREAM TEST from 0.0.0.0 () port 0 AF_INET to localhost () port 0 AF_INET : demo Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.02 1812.38 MIGRATED TCP STREAM TEST from 0.0.0.0 () port 0 AF_INET to localhost () port 0 AF_INET : demo Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.02 1843.34 > 3. turbo_mode=1, patched driver MIGRATED TCP STREAM TEST from 0.0.0.0 () port 0 AF_INET to localhost () port 0 AF_INET : demo Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.03 1822.99 MIGRATED TCP STREAM TEST from 0.0.0.0 () port 0 AF_INET to localhost () port 0 AF_INET : demo Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.03 1824.52 live well, vagrant
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