From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#18626: 24.3.94; communication with subprocess is slow Date: Sun, 05 Oct 2014 05:46:12 +0300 Message-ID: <837g0fnsi3.fsf@gnu.org> References: <85wq8ge3gr.fsf@stephe-leake.org> <85d2a8dzkh.fsf@stephe-leake.org> <83lhowgrr3.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1412477249 7014 80.91.229.3 (5 Oct 2014 02:47:29 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 5 Oct 2014 02:47:29 +0000 (UTC) Cc: stephen_leake@stephe-leake.org, 18626@debbugs.gnu.org To: Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Oct 05 04:47:21 2014 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Xabqt-0000EM-Pa for geb-bug-gnu-emacs@m.gmane.org; Sun, 05 Oct 2014 04:47:15 +0200 Original-Received: from localhost ([::1]:45935 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xabqt-0005BD-De for geb-bug-gnu-emacs@m.gmane.org; Sat, 04 Oct 2014 22:47:15 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:37707) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xabqm-0005B8-BQ for bug-gnu-emacs@gnu.org; Sat, 04 Oct 2014 22:47:13 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Xabqh-0000hY-Bh for bug-gnu-emacs@gnu.org; Sat, 04 Oct 2014 22:47:08 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:41820) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xabqh-0000hU-8E for bug-gnu-emacs@gnu.org; Sat, 04 Oct 2014 22:47:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1Xabqg-0003kv-Kh for bug-gnu-emacs@gnu.org; Sat, 04 Oct 2014 22:47:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 05 Oct 2014 02:47:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 18626 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 18626-submit@debbugs.gnu.org id=B18626.141247717414378 (code B ref 18626); Sun, 05 Oct 2014 02:47:02 +0000 Original-Received: (at 18626) by debbugs.gnu.org; 5 Oct 2014 02:46:14 +0000 Original-Received: from localhost ([127.0.0.1]:33384 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Xabpu-0003jq-0c for submit@debbugs.gnu.org; Sat, 04 Oct 2014 22:46:14 -0400 Original-Received: from mtaout29.012.net.il ([80.179.55.185]:38515) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Xabpq-0003jf-D4 for 18626@debbugs.gnu.org; Sat, 04 Oct 2014 22:46:12 -0400 Original-Received: from conversion-daemon.mtaout29.012.net.il by mtaout29.012.net.il (HyperSendmail v2007.08) id <0NCY0070088ZY400@mtaout29.012.net.il> for 18626@debbugs.gnu.org; Sun, 05 Oct 2014 05:45:23 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by mtaout29.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NCY00BQVABN5J20@mtaout29.012.net.il>; Sun, 05 Oct 2014 05:45:23 +0300 (IDT) In-reply-to: X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 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.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:94149 Archived-At: > From: Stefan Monnier > Cc: Stephen Leake , 18626@debbugs.gnu.org > Date: Sat, 04 Oct 2014 18:29:42 -0400 > > > Anyway, for 24.4 all I can suggest is a variable to replace the fixed > > 20 msec value. > > But why is this needed in 24.4? What has changed w.r.t 24.3? Unlike in 24.3, we now set the write end of the pipe to be in no-wait mode, and use the EWOULDBLOCK machinery in send_process to send large amounts of material down the pipe. This evidently makes the writing slower.