Bug 14531

Summary:	[2.4.x regression] In kernel 2.6.x you cannot see the real CPU usage during IO operations
Product:	Process Management	Reporter:	Artem S. Tashkinov (aros)
Component:	Scheduler	Assignee:	Ingo Molnar (mingo)
Status:	RESOLVED INVALID
Severity:	normal
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:		Subsystem:
Regression:	Yes	Bisected commit-id:
Bug Depends on:
Bug Blocks:	14648

Description Artem S. Tashkinov 2009-11-02 07:47:28 UTC

Whenever a process is reading or writing data to the storage media, CPU usage is always 100% (with 0% CPU idle) and it's not clear how much CPU time IO operations require and how much CPU time is left for running applications.

It's absolutely inconvenient and needs to be fixed.

If this bug is due to architecture, then architecture needs to be changed/fixed/improved/etc. - no other modern OS has this problem.

Comment 1 Artem S. Tashkinov 2010-05-27 19:24:15 UTC

Gnome System Monitor doesn't have this problem, closing.