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Re: Process priorities

On 19/9/02 12:17 AM, "Jonas Maebe" <email@hidden> wrote:
> If you use "top -d" (or "top -ud"), Darwin's top won't consume that many
> cycles either (it's still slightly more than under the other OS'es
> though).

Wow, I can't believe how much more responsive top seems with -ud! Although
it's a bit of a shame to have to lose all those memory statistics, at least
now I don't feel like I'm slowing everything down.

> It's the gathering of memory statistics that consumes so much
> time. On darwin-development, Apple engineers also always say this is
> because traversing the mach memory maps is a lot of work.

Just taking a brief look at top.c, it looks like there're a lot of hoops to
jump through (I'm looking at get_proc_info and pmem_doit). A brief run with
gprof says ~42% of time is spend in _mach_msg. I couldn't find that in the
code, is it something that is called from libc or via a system call? (I'm
not a mach guy :)

Cheers,
;) jimmy.

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 >Re: Process priorities (From: Jonas Maebe <email@hidden>)



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