Timers and timing, was: MySQL Performance 6.0rc1

[Steven Hartland]

For interest I ran truss on a typical game server we run under
FreeBSD to get a feel for how much this issue would affect
their performance.
Below is a small snippet from truss with -D which indicates
that they would also benefit from work in this area.

[log]
0.000012011 linux_select(0x1,0xbfbfe960,0x0,0x0,0xbfbfe958) = 0 (0x0)
0.000010615 linux_socketcall((12)LINUX_RECVFROM,0xbfbfe9a0) ERR#35 'Resource temporarily unavailable'
0.000010894 gettimeofday({1130534881 790912},0xbfbfe9f0) = 0 (0x0)
0.009520674 nanosleep({0 5000000})               = 0 (0x0)
0.000013409 linux_select(0x1,0xbfbfe960,0x0,0x0,0xbfbfe958) = 0 (0x0)
0.000010615 linux_socketcall((12)LINUX_RECVFROM,0xbfbfe9a0) ERR#35 'Resource temporarily unavailable'
0.000010615 gettimeofday({1130534881 800931},0xbfbfe9f0) = 0 (0x0)
0.009837732 nanosleep({0 5000000})               = 0 (0x0)
0.000012291 linux_select(0x1,0xbfbfe960,0x0,0x0,0xbfbfe958) = 0 (0x0)
0.000017320 linux_socketcall((12)LINUX_RECVFROM,0xbfbfe9a0) = 15 (0xf)
0.000011174 gettimeofday({1130534881 810942},0xbfbfe9e0) = 0 (0x0)
0.000034639 linux_socketcall((11)LINUX_SENDTO,0xbfbfe100) = 154 (0x9a)
0.000013129 linux_select(0x1,0xbfbfe960,0x0,0x0,0xbfbfe958) = 0 (0x0)
0.000010615 linux_socketcall((12)LINUX_RECVFROM,0xbfbfe9a0) ERR#35 'Resource temporarily unavailable'
0.000010615 gettimeofday({1130534881 811255},0xbfbfe9f0) = 0 (0x0)
[/log]


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