From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Andy Wingo Newsgroups: gmane.lisp.guile.bugs Subject: bug#14756: threads - par-map - multicore issue Date: Tue, 21 Jun 2016 08:51:09 +0200 Message-ID: <87lh1z592a.fsf@pobox.com> References: <20130630150054.07f19f35@capac> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1466491950 8858 80.91.229.3 (21 Jun 2016 06:52:30 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 21 Jun 2016 06:52:30 +0000 (UTC) Cc: 14756@debbugs.gnu.org To: ludo@gnu.org Original-X-From: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Tue Jun 21 08:52:14 2016 Return-path: Envelope-to: guile-bugs@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 1bFFXg-0005Od-OH for guile-bugs@m.gmane.org; Tue, 21 Jun 2016 08:52:12 +0200 Original-Received: from localhost ([::1]:49210 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bFFXf-0007GX-Rw for guile-bugs@m.gmane.org; Tue, 21 Jun 2016 02:52:11 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:46235) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bFFXa-0007GR-NA for bug-guile@gnu.org; Tue, 21 Jun 2016 02:52:07 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bFFXW-0008HL-Es for bug-guile@gnu.org; Tue, 21 Jun 2016 02:52:05 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:36098) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bFFXW-0008HH-BQ for bug-guile@gnu.org; Tue, 21 Jun 2016 02:52:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1bFFXV-0000D3-Um for bug-guile@gnu.org; Tue, 21 Jun 2016 02:52:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Andy Wingo Original-Sender: "Debbugs-submit" Resent-CC: bug-guile@gnu.org Resent-Date: Tue, 21 Jun 2016 06:52:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 14756 X-GNU-PR-Package: guile X-GNU-PR-Keywords: Original-Received: via spool by 14756-submit@debbugs.gnu.org id=B14756.1466491884753 (code B ref 14756); Tue, 21 Jun 2016 06:52:01 +0000 Original-Received: (at 14756) by debbugs.gnu.org; 21 Jun 2016 06:51:24 +0000 Original-Received: from localhost ([127.0.0.1]:48435 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bFFWu-0000C5-42 for submit@debbugs.gnu.org; Tue, 21 Jun 2016 02:51:24 -0400 Original-Received: from pb-sasl2.pobox.com ([64.147.108.67]:64995 helo=sasl.smtp.pobox.com) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bFFWs-0000Bx-3x for 14756@debbugs.gnu.org; Tue, 21 Jun 2016 02:51:22 -0400 Original-Received: from sasl.smtp.pobox.com (unknown [127.0.0.1]) by pb-sasl2.pobox.com (Postfix) with ESMTP id AF123205A2; Tue, 21 Jun 2016 02:51:21 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=pobox.com; h=from:to:cc :subject:references:date:in-reply-to:message-id:mime-version :content-type; s=sasl; bh=skAX8VXb8SnZDECSFvf9eS7G0hM=; b=oyQM6r X5R2Is4ZCTBpl3QM4yfC4QkKyKW8wGc2Rh/QGZqviY3xonVlvff9zOnB5V1i/qmS dUVpqxSeo8qDbZK1EGvYYpq+QEKC7deDASfqnTnCATWH1rya9lwBxWmTNu3H2qT8 lRLLmJt4wCn7qcLRBvP4b7LpZOwtgrFALYI8w= DomainKey-Signature: a=rsa-sha1; c=nofws; d=pobox.com; h=from:to:cc :subject:references:date:in-reply-to:message-id:mime-version :content-type; q=dns; s=sasl; b=Ij7AdWal67OeoJ5OZ/psuQCWE2l7XIrK j7BrpULVnzD+PsEwoefk2fQbRsJvn1pGLBQoFPRl67PYO+yqSCXyVx7xXb/aRDqv 1joaJjDHhYA1LHxRmP/lzOfPdJzjOi0KHdqPVwKyOiVMUzR+QX9LjLYSE67UGaId lH9Yr8QTRFo= Original-Received: from pb-sasl2.nyi.icgroup.com (unknown [127.0.0.1]) by pb-sasl2.pobox.com (Postfix) with ESMTP id 950DE205A0; Tue, 21 Jun 2016 02:51:21 -0400 (EDT) Original-Received: from clucks (unknown [88.160.190.192]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by pb-sasl2.pobox.com (Postfix) with ESMTPSA id 811982059A; Tue, 21 Jun 2016 02:51:17 -0400 (EDT) In-Reply-To: <20130630150054.07f19f35@capac> (David Pirotte's message of "Sun, 30 Jun 2013 15:00:54 -0300") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) X-Pobox-Relay-ID: 8FCF8A5C-377C-11E6-9729-28A6F1301B6D-02397024!pb-sasl2.pobox.com X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-guile@gnu.org List-Id: "Bug reports for GUILE, GNU's Ubiquitous Extension Language" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Original-Sender: "bug-guile" Xref: news.gmane.org gmane.lisp.guile.bugs:8054 Archived-At: I see this, but I'm not quite sure what's going on. What I do see is that par-map of 1+ on a list is horribly slow, both on 2.0 and master. Ludovic do you know what's going on here? Andy On Sun 30 Jun 2013 20:00, David Pirotte writes: > Hello, > > guile --version > guile (GNU Guile) 2.0.9.20-10454 > > It seems that the par-map not using all cores problem has some how been reintroduced? > > guile -c '(begin (use-modules (ice-9 threads)) (par-map 1+ (iota 400000)))' > > only uses 1 core [it seems it uses some other [maybe all, i can't tell] a couple of > milliseconds, then drops to 1 core only. > > Thanks, > David > > ;; -- > > david@idefix:~ 16 $ guile -c '(begin >> (use-modules (ice-9 threads)) >> (par-map 1+ (iota 400)) >> (display (current-processor-count)) (display "\n") >> (display (length (@@ (ice-9 futures) %workers))) (display "\n"))' > 12 > 11