Re: [boost] [Chrono] Proposed library now feature complete

Subject: Re: [boost] [Chrono] Proposed library now feature complete
From: Beman Dawes (bdawes_at_[hidden])
Date: 2008-11-18 17:03:20

On Tue, Nov 18, 2008 at 1:40 PM, vicente.botet <vicente.botet_at_[hidden]> wrote:

> As you have started to add other features in addition to the ratio+chrono libraries, I was wondering if in addition to procees CPU usage you can add thread CPU usage. What about  CPU% for process and a threads?

The need that comes up over and over is for wall-clock time, and per
process cpu user and system time. And that's what POSIX times() and
equivalent Win32 functions have provided for many years.

On some operating systems there are lots of other times available, but
I have no idea if these other times have portable equivalents. Did you
have something specific in mind, or was it a theoretical question?

> Are these in the scope of your library?
>
> process_timer gives real, user and system times. What about iowait?

It would be useful if generally available. Ideas for how to measure on
Windows and POSIX would be appreciated.

--Beman