From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#44674: 28.0.50; Adding current-cpu-time for performance tests Date: Mon, 16 Nov 2020 19:38:41 +0200 Message-ID: <83sg99ryla.fsf@gnu.org> References: <83y2j1rz2f.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="5822"; mail-complaints-to="usenet@ciao.gmane.io" Cc: mattiase@acm.org, p.stephani2@gmail.com, 44674@debbugs.gnu.org To: monnier@iro.umontreal.ca Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon Nov 16 18:39:12 2020 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1keiT8-0001NW-1x for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 16 Nov 2020 18:39:10 +0100 Original-Received: from localhost ([::1]:34618 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1keiT7-0001UV-3D for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 16 Nov 2020 12:39:09 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:53078) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1keiT0-0001TP-Gp for bug-gnu-emacs@gnu.org; Mon, 16 Nov 2020 12:39:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:45554) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1keiT0-0005ES-7S for bug-gnu-emacs@gnu.org; Mon, 16 Nov 2020 12:39:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1keiT0-0006yw-43 for bug-gnu-emacs@gnu.org; Mon, 16 Nov 2020 12:39:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 16 Nov 2020 17:39:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 44674 X-GNU-PR-Package: emacs Original-Received: via spool by 44674-submit@debbugs.gnu.org id=B44674.160554833926823 (code B ref 44674); Mon, 16 Nov 2020 17:39:02 +0000 Original-Received: (at 44674) by debbugs.gnu.org; 16 Nov 2020 17:38:59 +0000 Original-Received: from localhost ([127.0.0.1]:57099 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1keiSx-0006yZ-DJ for submit@debbugs.gnu.org; Mon, 16 Nov 2020 12:38:59 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:52968) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1keiSu-0006yK-VY for 44674@debbugs.gnu.org; Mon, 16 Nov 2020 12:38:57 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:37702) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1keiSp-0005Bh-Li; Mon, 16 Nov 2020 12:38:51 -0500 Original-Received: from [176.228.60.248] (port=3636 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1keiSm-0003r0-Mf; Mon, 16 Nov 2020 12:38:50 -0500 In-Reply-To: <83y2j1rz2f.fsf@gnu.org> (message from Eli Zaretskii on Mon, 16 Nov 2020 19:28:24 +0200) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:193452 Archived-At: > Date: Mon, 16 Nov 2020 19:28:24 +0200 > From: Eli Zaretskii > Cc: mattiase@acm.org, p.stephani2@gmail.com, 44674@debbugs.gnu.org > > > What do you mean by "origin" and by "calling 'system'"? > > Quoting https://pubs.opengroup.org/onlinepubs/9699919799/: > > The clock() function shall return the implementation's best > approximation to the processor time used by the process > since the beginning of an implementation-defined era > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > related only to the process invocation. > > How do you write portable Lisp code that returns consistent results > based on such shaky foundations? Sorry, forgot to answer the 'system' part. The issue there is whether calling 'system' (and in general waiting for sub-processes to exit) is counted against the process's use of CPU or not. AFAIK, this is not well defined, either.