Hello, I have 32 processor machine (2x CPU E5-2650) running several CPU-bound processes (ULE scheduler). 3 processes are 32-threaded, and 8 are single threaded.
I bind all 3 32-threaded processes to CPUs 0-24 (cpuset -C -l 0-24 -p XXX). I expect that the remaining 8 single-threaded processes will (mostly) run on the remaining 25-31 CPU cores and use (almost) 100% cpu each. But this is not the case (according to top(1)): they spend a lot of time on 0-24 CPUs and CPU Idle time is about 10%. These are all purely computational programs, in idle system single-threaded programs steadily consume 100% of a core, and 32-threaded programs consume all 32 cores and idle time is zero. Is it an ULE scheduler feature or am I doing something wrong? The goal is to give a single-threaded program a chance to run when somebody started several 32-threaded processes. Thanks! _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
