public inbox for cygwin-developers@cygwin.com
 help / color / mirror / Atom feed
From: Mark Geisert <mark@maxrnd.com>
To: cygwin-developers@cygwin.com
Subject: Re: load average calculation failing
Date: Tue, 10 May 2022 01:21:43 -0700	[thread overview]
Message-ID: <f4685564-75a5-efc4-cf6f-58868abc6339@maxrnd.com> (raw)
In-Reply-To: <fdbc47d6-27e1-73ac-af59-745ca1bb5283@dronecode.org.uk>

Jon Turney wrote:
> On 08/05/2022 08:01, Mark Geisert wrote:
>> Mark Geisert wrote (on the main Cygwin mailing list):
>>> I've recently noticed that the 'xload' I routinely run shows zero load even 
>>> with compute-bound processes running.  This is on both Cygwin pre-3.4.0 as well 
>>> as 3.3.4.  A test program, shown below, indicates that getloadavg() is 
>>> returning with 0 status, i.e. not an error but no elems
>>> of the passed-in array updated.
>>>
> 
> One other thing I forgot to mention: xload doesn't call getloadavg(), it directly 
> uses the PDH interface, see:
> 
> https://gitlab.freedesktop.org/xorg/app/xload/-/blob/master/get_load.c#L71

Ah, I did notice xload on the list of pdh.dll users at some point, thanks.
And thanks explicitly for the pointer to your github-hosted wmi-loadavg.cc.
That has indeed been very helpful in poking around this issue.
Cheers,

..mark

      reply	other threads:[~2022-05-10  8:21 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <Pine.BSF.4.63.2205051618470.42373@m0.truegem.net>
2022-05-08  7:01 ` Mark Geisert
     [not found]   ` <223aa826-7bf9-281a-aed8-e16349de5b96@dronecode.org.uk>
2022-05-09  8:45     ` Corinna Vinschen
2022-05-09  8:53       ` Corinna Vinschen
2022-05-10  8:34       ` Mark Geisert
2022-05-10 13:37         ` Jon Turney
2022-05-11 23:40           ` load average calculation failing -- fixed by Windows update Mark Geisert
2022-05-12  8:17             ` Corinna Vinschen
2022-05-12  8:24               ` Mark Geisert
2022-05-12  8:43                 ` Corinna Vinschen
2022-05-12  9:48             ` Corinna Vinschen
2022-05-13 10:34               ` Jon Turney
2022-05-13 11:04                 ` Corinna Vinschen
2022-05-13 11:05                   ` Corinna Vinschen
2022-05-16  5:25                     ` load average calculation imperfections Mark Geisert
2022-05-16 16:49                       ` Jon Turney
2022-05-17  5:39                         ` Mark Geisert
2022-05-17 14:48                     ` load average calculation failing -- fixed by Windows update Jon Turney
2022-05-17 19:48                       ` Mark Geisert
2022-05-09 11:29   ` load average calculation failing Jon Turney
2022-05-10  8:21     ` Mark Geisert [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=f4685564-75a5-efc4-cf6f-58868abc6339@maxrnd.com \
    --to=mark@maxrnd.com \
    --cc=cygwin-developers@cygwin.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).