Messages in this thread | | | Date | Thu, 29 Aug 2002 20:54:48 -0700 | From | Andrew Morton <> | Subject | Re: statm_pgd_range() sucks! |
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William Lee Irwin III wrote: > > William Lee Irwin III wrote: > >> (1) shared, lib, text, & total are now reported as what's mapped > >> instead of what's resident. This actually fixes two bugs: > > On Thu, Aug 29, 2002 at 07:51:44PM -0700, Andrew Morton wrote: > > hmm. Personally, I've never believed, or even bothered to try to > > understand what those columns are measuring. Does anyone actually > > find them useful for anything? If so, what are they being used for? > > What info do we really, actually want to know? > > I'm basically looking for VSZ, RSS, %cpu, & pid -- after that I don't > care.
Well statistics coming out of the kernel can be quite vital in the tuning of real world applications - they're not just for kernel developers. The stats contribute to the bottom-line performance and stability of the things for which people are actually using the kernel. That's a motherhood statement, I know, but I think it's important.
> ... > > Per-vma RSS is trivial, just less self-contained. Everywhere the > mm->rss is touched, the vma to account that to is also known, except > for put_dirty_page(), and that can be repaired as its caller knows.
This would provide useful information at a justifiable cost, don't you think?
(ho-hum, all right. I'll code it ;)) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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