From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Jim Blandy Newsgroups: gmane.emacs.devel Subject: Figuring out what's doing so much allocation Date: Fri, 10 Feb 2012 11:22:40 -0800 Message-ID: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary=f46d044289ee5bd71304b8a10d4e X-Trace: dough.gmane.org 1328901776 13631 80.91.229.3 (10 Feb 2012 19:22:56 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Fri, 10 Feb 2012 19:22:56 +0000 (UTC) To: Emacs Devel Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Feb 10 20:22:56 2012 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Rvw3a-0005Lv-He for ged-emacs-devel@m.gmane.org; Fri, 10 Feb 2012 20:22:54 +0100 Original-Received: from localhost ([::1]:36871 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Rvw3Z-00083P-MY for ged-emacs-devel@m.gmane.org; Fri, 10 Feb 2012 14:22:53 -0500 Original-Received: from eggs.gnu.org ([140.186.70.92]:59098) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Rvw3T-00082C-4t for emacs-devel@gnu.org; Fri, 10 Feb 2012 14:22:51 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Rvw3O-00065x-HK for emacs-devel@gnu.org; Fri, 10 Feb 2012 14:22:47 -0500 Original-Received: from mail-wi0-f169.google.com ([209.85.212.169]:52274) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Rvw3O-00065h-D1 for emacs-devel@gnu.org; Fri, 10 Feb 2012 14:22:42 -0500 Original-Received: by wibhj13 with SMTP id hj13so2869024wib.0 for ; Fri, 10 Feb 2012 11:22:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:date:x-google-sender-auth:message-id:subject :from:to:content-type; bh=Ra9IueC9tFSu97xsH6oegkY7T5y5QDdSabdxWtyxQoE=; b=gLt6DLz5tA0pB+K9qc+9n/V3D/7IcPtSNRtqrm2wRCbHEMfcikncEt00Cy9xdcPby/ 1D3dLeKabN0cbAufUf1QqekJmYRg8Q4W0p27gSjaM7Fv0/zQ9YvvZKrdER4VvaLqM7m6 Mp815lIKKn+0vG1tnDHJm3YmGGO832HF23ORI= Original-Received: by 10.180.83.104 with SMTP id p8mr5155558wiy.4.1328901760210; Fri, 10 Feb 2012 11:22:40 -0800 (PST) Original-Received: by 10.216.166.147 with HTTP; Fri, 10 Feb 2012 11:22:40 -0800 (PST) X-Google-Sender-Auth: d-oAjOaOYdN6WbRGqpo3s-WIPwk X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 209.85.212.169 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:148461 Archived-At: --f46d044289ee5bd71304b8a10d4e Content-Type: text/plain; charset=ISO-8859-1 I was running into a problem (now fixed) in which gc was running constantly, so I put together the following hack to figure out who was doing the allocation. Set gc-quit-frequency to something like 20, and then set debug-on-quit, and you'll get a backtrace every 20th gc. It's hardly precise, but often one just needs a hint to suss out the cause. --f46d044289ee5bd71304b8a10d4e Content-Type: text/x-patch; charset=US-ASCII; name="gc-quit-frequency.patch" Content-Disposition: attachment; filename="gc-quit-frequency.patch" Content-Transfer-Encoding: base64 X-Attachment-Id: f_gyhlscmn0 ZGlmZiAtLWdpdCBhL3NyYy9hbGxvYy5jIGIvc3JjL2FsbG9jLmMKaW5kZXggMDQ0ZTc1MC4uM2I5 ODMwMSAxMDA2NDQKLS0tIGEvc3JjL2FsbG9jLmMKKysrIGIvc3JjL2FsbG9jLmMKQEAgLTQ5OTgs NiArNDk5OCwxNCBAQCByZXR1cm5zIG5pbCwgYmVjYXVzZSByZWFsIEdDIGNhbid0IGJlIGRvbmUu ICAqLykKICAgaW50IGNvdW50ID0gU1BFQ1BETF9JTkRFWCAoKTsKICAgRU1BQ1NfVElNRSB0MSwg dDIsIHQzOwogCisgIGlmIChnY19xdWl0X2ZyZXF1ZW5jeSkgeworICAgIHN0YXRpYyBpbnQgY291 bnRlciA9IDA7CisgICAgaWYgKC0tY291bnRlciA9PSAwKQorICAgICAgVnF1aXRfZmxhZyA9IFF0 OworICAgIGlmIChjb3VudGVyIDw9IDApCisgICAgICBjb3VudGVyID0gZ2NfcXVpdF9mcmVxdWVu Y3k7CisgIH0KKwogICBpZiAoYWJvcnRfb25fZ2MpCiAgICAgYWJvcnQgKCk7CiAKQEAgLTYzNTks NiArNjM2Nyw3IEBAIGluaXRfYWxsb2Nfb25jZSAodm9pZCkKICAgYnl0ZV9zdGFja19saXN0ID0g MDsKICAgc3RhdGljaWR4ID0gMDsKICAgY29uc2luZ19zaW5jZV9nYyA9IDA7CisgIGdjX3F1aXRf ZnJlcXVlbmN5ID0gMDsKICAgZ2NfY29uc190aHJlc2hvbGQgPSAxMDAwMDAgKiBzaXplb2YgKExp c3BfT2JqZWN0KTsKICAgZ2NfcmVsYXRpdmVfdGhyZXNob2xkID0gMDsKIH0KQEAgLTYzODAsNiAr NjM4OSw5IEBAIGluaXRfYWxsb2MgKHZvaWQpCiB2b2lkCiBzeW1zX29mX2FsbG9jICh2b2lkKQog eworICBERUZWQVJfSU5UICgiZ2MtcXVpdC1mcmVxdWVuY3kiLCBnY19xdWl0X2ZyZXF1ZW5jeSwK KyAgICAgICAgICAgICAgZG9jOiAvKiAqUXVpdCBldmVyeSB0aGlzIG1hbnkgR0Mncy4gSWYgemVy bywgZG9uJ3QuICovKTsKKwogICBERUZWQVJfSU5UICgiZ2MtY29ucy10aHJlc2hvbGQiLCBnY19j b25zX3RocmVzaG9sZCwKIAkgICAgICBkb2M6IC8qICpOdW1iZXIgb2YgYnl0ZXMgb2YgY29uc2lu ZyBiZXR3ZWVuIGdhcmJhZ2UgY29sbGVjdGlvbnMuCiBHYXJiYWdlIGNvbGxlY3Rpb24gY2FuIGhh cHBlbiBhdXRvbWF0aWNhbGx5IG9uY2UgdGhpcyBtYW55IGJ5dGVzIGhhdmUgYmVlbgo= --f46d044289ee5bd71304b8a10d4e--