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

[John Reiser <jreiser@BitWagon.com>]

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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