Re: 8.0 performance issue when running build.sh?

[Mindaugas Rasiukevicius <rmind%netbsd.org@localhost>]

Martin Husemann <martin%duskware.de@localhost> wrote:
> So here is a more detailed analyzis using flamegraphs:
> 
> 	https://netbsd.org/~martin/bc-perf/
> 
> 
> All operations happen on tmpfs, and the locking there is a significant
> part of the game - however, lots of mostly idle time is wasted and it is
> not clear to me what is going on.

Just from a very quick look, it seems like a regression introduced with
the vcache changes: the MP-safe flag is set too late and not inherited
by the root vnode.

http://www.netbsd.org/~rmind/tmpfs_mount_fix.diff

-- 
Mindaugas