Messages in this thread | | | Date | Mon, 19 Nov 2007 12:29:36 +0000 | From | Alan Cox <> | Subject | Re: Query on kernel metrics available |
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On Mon, 19 Nov 2007 12:59:26 +0530 Raj Mathur <raju@linux-delhi.org> wrote:
> A competing OS vendor is claiming that the Linux kernel has no way to > measure the following: > > a. Time spent waiting for page faults in percent > > b. Total transfer time for each auxiliary memory in percent > > c. Time in percent when one or more tasks were blocked waiting for > memory resources > > d. Time spent waiting for page faults in percent
a an d appear to be the same thing
> I was wondering if the claims were pure FUD or are measurements > possible -- whether they are actually implemented or not is not > important (at least at this stage). Apologies if the descriptions > aren't very precise; OTOH that leaves us room to interpret the claims > in a favourable (to us) manner :)
Systemtap as shipped by most of the enterprise vendors can measure all of this quite easily.
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