JG if you comment out the sysconf for windows you'll have to set a default value for opt_n_threads on windows since it's now zero.

This is why I started hacking on jgarzik's one instead. The c code in it is much more what I'm familiar with and I've dealt with Jeff before The other cpuminer is the one with the assembly code.

Done. Pull request generated. I've modified the code accordingly to try and build still elsewhere. Please check the changes as I can't compile test on other OSs.

Hi Jeff

Yeah I'll get more organised and do so tonight.

I'm sorry the timing in relation to your bug report was coincidence. I wasn't trying to fix your problem.

It is of course the recommended settings hard coded in, but you'll see there was more mentioned in the changelog. It detects the number of CPUs and sets threads accordingly, it only runs the actual mining threads at lower priority (and not the master or work gathering threads), it sets the CPU affinity now which can improve throughput, it utilises the lower priority scheduling policies wherever possible (by trying to set SCHED_IDLE first and then if it fails, SCHED_BATCH before dropping back to just nice 19) and it has some minor optimisations.

Hi. I've made some minor modifications to cpuminer that are x86_64 linux specific.

Here's the list of changes:
- Linux x86_64 tweaked version
- Uses sse2_64 algo by default
- Detects CPUs and sets threads accordingly
- Uses CPU affinity for each thread where appropriate
- Sets scheduling policy to lowest possible
- Minor performance tweaks

The changes aren't entirely portable but Jeff you might be interested in some or all of them.

Grab the source here:
http://ck.kolivas.org/apps/cpuminer-1.0.1a.tar.bz2