CVS commit: src/sys/kern

["Andrew Doran" <ad%netbsd.org@localhost>]

Module Name:    src
Committed By:   ad
Date:           Tue May  5 22:12:07 UTC 2020

Modified Files:
        src/sys/kern: sys_lwp.c

Log Message:
lwp_unpark(): no need to acquire LWP refs or drop the proc lock.

On the hacky benchmarks I have, held over from the transition to 1:1
threading, this restores pthread_cond_signal() perf to radixtree/sleepq
levels, and semes much better than either with pthread_cond_broadcast() and
10 threads.  It would be interesting to see what might be achieved with a
lockless lookup, which is within grasp now thanks to pid_table being used
for lookup.


To generate a diff of this commit:
cvs rdiff -u -r1.79 -r1.80 src/sys/kern/sys_lwp.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.