> > On 09/03/2011, at 4:47 PM, Roberto De Ioris wrote: >> There is no specific policy set. This is up to the os scheduler. >> On Linux (for example) a process should run always on the same cpu (to >> get >> the best from local processor cache). >> >> Do you know cases for which it can be useful to migrate processes to >> other >> cores (or when can be useful to bind to specific one)? > > Yes- in my case, I have several sites- one 8 processes, one 4, the others > just 1 or 2. But my CPU usage is not spread between 4 cores evenly. See > pic below. If you can't see the pic, the averages are 11.7, 2.8, 2, and > 1.4. Core 1 is having all the fun. > >
Try the latest tip --cpu-affinity <n> where n is the number of cpus to dedicate per-worker Example (4 cpu, 4 workers, affinity 1) worker 1 cpu 0 worker 2 cpu 1 worker 3 cpu 2 worker 4 cpu 3 (2 cpu, 4 workers, affinity 1) worker 1 cpu 0 worker 2 cpu 1 worker 3 cpu 0 worker 4 cpu 1 (4 cpu, 4 workers, affinity 2) worker 1 cpu 0 1 worker 2 cpu 2 3 worker 3 cpu 0 1 worker 4 cpu 2 3 (4 cpu, 8 workers, affinity 3) worker 1 cpu 0 1 2 worker 2 cpu 3 0 1 worker 3 cpu 2 3 0 worker 4 cpu 1 2 3 worker 5 cpu 0 1 2 worker 6 cpu 3 0 1 worker 7 cpu 2 3 0 worker 8 cpu 1 2 3 -- Roberto De Ioris http://unbit.it _______________________________________________ uWSGI mailing list [email protected] http://lists.unbit.it/cgi-bin/mailman/listinfo/uwsgi
