Re: Measuring per thread CPU consumption & others statistics for NPTL

From: John Reiser
Date: Mon Nov 17 2003 - 11:39:03 EST


Peter Zaitsev wrote:
On Mon, 2003-11-17 at 03:27, Peter Chubb wrote:
If you apply my microstate accounting patch, you can get nanosecomnd
resolution per thread.

Is it planned to be included in the kernel at some point ?
For me it is the most important not to get things working on some
particular test systems, but to allow customers, which run generic or
vendor provided kernels to use the functionality.

The current 2.6.0-test9-bk22 has no microsecond-or-finer per-thread
accounting, so based on current policy and past experience you may
have to wait two years.

A leading contender for x86 and x86_64 is the perfctr patches
http://www.csd.uu.se/~mikpe/linux/perfctr/ which have been maintained
for a number of years (v1.0 at 2000-01-31 for Linux 2.2.14/2.3.41) and
have a following, including http://icl.cs.utk.edu/projects/papi/ .
A recent patched, ready-to-install NPTL kernel happens to reside at
http://www.BitWagon.com/ftp/kernel-smp-2.4.20-20.9.perfctr2.5.5.i686.rpm .

For a complete profiler: http://www.BitWagon.com/tsprof/tsprof.html
which also will run on a generic kernel in "-wallclock" mode
(TSC cycle accuracy, but not virtualized.)

--



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