lkml.org 
[lkml]   [2007]   [Aug]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subject[PATCH/RFC 0/4]Virtual Machine time accounting
The aim of these four patches is to introduce Virtual Machine time accounting.

[PATCH 1/4] as modern CPUs introduce a third running state, after "user" and
"system", we need a new field, "guest", in cpustat to store the time used by
the CPU to run virtual CPU. Modify /proc/stat to display this new field.

[PATCH 2/4] like for cpustat, introduce the "guest" and "cguest" fields for the
tasks. Modify signal_struct and task_struct. Modify /proc/<pid>/stat to display
these new field

[PATCH 3/3] introduce "account modifiers" mechanism in the kernel allowing a
module to modify the collected accounting for a given task. This implementation
is based on the "preempt_notifier". "account_system_time()" and
"account_user_time()" can call functions registered by a module to modify the
cputime value.

[PATCH 4/4] Modify KVM to use the "account modifiers". KVM can now measure time
consumed by a Virtual Machine on a per-cpu basis and modify kernel statistics to
report this value.

Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net>
--
------------- Laurent.Vivier@bull.net --------------
"Software is hard" - Donald Knuth

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-08-16 18:01    [W:0.021 / U:0.584 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site