07-16-2007
I guess the best way would be to include some sort of short benchmark testing ability in your program: the user tweaks the number of threads, chooses to benchmark, then the program tries for say 30 seconds to do as much work as possible, then outputs how many work units each type of thread got through?
I guess the number of workers would be platform specific, so for example, on Linux 2.6 you probably want nCPUs+1, whereas on Solaris10 on a T2000 you only want nCPUs worth of workers.
For readers, you probably don't want a hard disk to be in contention between 2 threads, but having a channel (SCSI or ATA) shared is probably a good move - to ensure that channel is saturated. So i guess readers boils down to the number of hard disk spindles you'll be touching.
Cheers,
-c
p.s. i tried to find some material that backs up my assertion you want nCPUs+1 worker threads on Linux2.6 (i heard this somewhere before), but i couldn't find any, so maybe i'm wrong there? Anyone else know?
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