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Re: memcpy of struct buf, or similar?
Andrew Doran wrote:
> On Tue, Jun 10, 2008 at 01:58:43AM +1000, Simon Burge wrote:
> > Andrew Doran wrote:
> > > Are you running with LOCKDEBUG? It's probably failure to release a spin
> > > mutex.
> > No anymore - I used to run with it all the time, but not since enabling
> > it took a large performance hit some time post netbsd-4. I'll try
> > LOCKDEBUG (tomorrow).
> There have beem some changes recently that reduce its CPU usage. I'm finding
> it a lot more useable than it was.
With a config that is just GENERIC + LOCKDEBUG+DEBUG+DIAGNOSTIC, a
kernel immediately before a change to condvars can do two builds
in ~70 minutes. A kernel from immediately after that change hits
biowait/tstile problems in ~18 minutes.
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