The examples in the previous mail are from the case with MTU is 8000
(and were to only two occurances of a EAGAIN for read() actually).
Allow me show the statistics for both MTU's:
MTU 16436:
~>grep -B1 '\[srvx2\] select.*<0\.[1-9]' mtu16436 | grep '\[srvx2\] read' | wc --lines
323
~>grep -B1 '\[srvx2\] select.*<0\.[1-9]' mtu16436 | grep '\[srvx2\] read.*EAGAIN' | wc --lines
323
Conclusion: ALL calls to select() that took longer than 0.1 second
were following a call to read() that failed with EAGAIN. In total 323 times.
MTU 8000:
~>grep -B1 '\[srvx2\] select.*<0\.[1-9]' mtu8000 | grep '\[srvx2\] read' | wc --lines
2
~>grep -B1 '\[srvx2\] select.*<0\.[1-9]' mtu8000 | grep '\[srvx2\] read.*EAGAIN' | wc --lines
2
Idem, but only two occurences.
The total number of calls to select in both are respectively:
~>grep '\[srvx2\] select.*' mtu16436 | wc --lines
1221
~>grep '\[srvx2\] select.*' mtu8000 | wc --lines
658
--
Carlo Wood <[email protected]>
(Also forwarded because first I used a wrong address)