Re: [PATCH] Performance Stats: Kernel patch

On Tue, 08 May 2007 16:26:51 +0000
Maxim Uvarov [off-list ref] wrote:

From: Maxim Uvarov <redacted>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: pavel@ucw.cz
Cc: linuxppc-dev@ozlabs.org
Cc: wli@holomorphy.com
Cc: dada1@cosmosbay.com
Cc: pavel@ucw.cz

Strange that linux-ppc was the only mailing list you copied?

Subject: [PATCH] Performance Stats: Kernel patch
Date: Tue, 08 May 2007 16:26:51 +0000
User-Agent: StGIT/0.12.1


Patch makes available to the user the following
task and process performance statistics:
	* Involuntary Context Switches (task_struct->nivcsw)
	* Voluntary Context Switches (task_struct->nvcsw)
	* Number of system calls (added new counter
	  thread_info->sysall_count)
	           
Statistics information is available from:
        1. taskstats interface (Documentation/accounting/)
	2. /proc/PID/status (task only).

This data is useful for detecting hyperactivity
patterns between processes.

syscall entry is a super-hotpath and there will be a developer revolt
if we go adding an incl to that path, sorry.

(Did that incl also cover the int 80 entry?)