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Re: mutexes, locks and so on...
Johnny Billquist wrote:
> On 2010-11-20 03:59, Simon Burge wrote:
> > Johnny Billquist wrote:
> >> What I don't get is why it take so much time to even respond to
> >> pings, compared to Ultrix or VMS. What are we doing in the kernel??? As
> >> usual, I'm open to suggestions...
> > Have you tried a profiling kernel? I know that can introduce its own
> > overheads,
> > but might point out some hot spots...
> No, I haven't. But it's a good idea. Last time I tried that was many,
> many moons ago, and back then I never got it to work.
It's been a few moons here too, but used to work well on i386, amd64, mips
> Do we have some quick intro on how to do it?
This should be enough to get started:
config -p ...
build/boot new kernel
kgmon -br ; sleep XX ; kgmon -ph
- or -
kgmon -br ; do-something ; kgmon -ph
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