Re: 2.4.20, .text.lock.swap cpu usage? (ibm x440)

From: William Lee Irwin III (wli@holomorphy.com)
Date: Wed Jan 08 2003 - 21:57:36 EST


On Mon, Jan 06, 2003 at 04:35:17PM -0700, Chris Wood wrote:
> With some tips from James Cleverdon (IBM), I turned on some kernel
> debugging and got the following from readprofile when the server was
> having problems (truncated to the first 22 lines):
> 16480 total 0.0138

Here are some monitoring tools that might help detect the cause of
the situation.

bloatmon is the "back end"; there's no reason to run it directly.

bloatmeter shows the "least utilized" slabs.

bloatmost shows the largest slabs.

These sort of make for a top(1) for "lowmem pressure". Not everything
is accounted there, though. The missing pieces are largely

(1) simultaneous temporary poll table allocations
(2) pmd's
(3) kernel stacks

Bill







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