Re: [PATCH] O11int for interactivity

William Lee Irwin III
2003-08-05T03:30:19Z

William Lee Irwin III wrote:
>> Well, I was vaguely hoping a useful way to instrument the io stuff
>> would already be out there.

On Tue, Aug 05, 2003 at 01:23:08PM +1000, Nick Piggin wrote:
> Not really.
> For a process doing blocking reads you could measure the time
> from when a process submits a read to when it gets the result.
> I suppose you also need some minimum rate too but I really can't
> see that being the problem here.

I'm at least aware of patches for 2.4.x that log io scheduling
decisions in the driver, which is basically what I was hoping for.

On a higher level, are you thinking there's some indication the
io schedulers themselves aren't involved? Or that something higher-
level should be instrumented? If so, what?

-- wli