From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756637Ab2ERPjN (ORCPT ); Fri, 18 May 2012 11:39:13 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34279 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755906Ab2ERPjL (ORCPT ); Fri, 18 May 2012 11:39:11 -0400 Date: Fri, 18 May 2012 12:38:54 -0300 From: Arnaldo Carvalho de Melo To: Feng Tang Cc: mingo@elte.hu, a.p.zijlstra@chello.nl, robert.richter@amd.com, ak@linux.intel.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH 3/3] perf script/python: Pass thread/dso name and symbol info to event handler in python Message-ID: <20120518153854.GF2636@infradead.org> References: <1337173155-25780-1-git-send-email-feng.tang@intel.com> <1337173155-25780-3-git-send-email-feng.tang@intel.com> <20120517154726.GC2636@infradead.org> <20120518105527.154fe294@feng-i7> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120518105527.154fe294@feng-i7> X-Url: http://acmel.wordpress.com User-Agent: Mutt/1.5.20 (2009-12-10) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Em Fri, May 18, 2012 at 10:55:27AM +0800, Feng Tang escreveu: > On Thu, 17 May 2012 12:47:26 -0300 > Arnaldo Carvalho de Melo wrote: > > > PyTuple_SetItem(t, n++, PyString_FromStringAndSize( > > > data, sample->raw_size)); > > > + PyTuple_SetItem(t, n++, PyString_FromString(thread->comm)); > > > + PyTuple_SetItem(t, n++, PyString_FromString(al->map->dso->name)); > > > + > > > + /* Pass the resolved symbol if there is, othersize pass "Unkown" */ > > > + if (al->sym) > > > + PyTuple_SetItem(t, n++, > > > PyString_FromString(al->sym->name)); > > > + else > > > + PyTuple_SetItem(t, n++, PyString_FromString("Unknown")); > > > > Isn't this getting a little bit convoluted? > > > > I.e. python has dictionaries, perhaps we could pass a dict instead of a > > tuple, in that case we would simply not add the "symbol" key. > > IIRC, the PyObject_CallObjects() only accept "tuple" arguments, or did > you mean make the "symbol" a dict and an item of the "t" tuple? > > I agree the symbol code is ugly, is following a little better? > PyTuple_SetItem(t, n++, PyString_FromString((al->sym) ? al->sym->name : "Unknown")); What I meant was: make it so that the process_event() python method we look for receives as its first argument a dict. I.e. pass a tuple to PyObject_CallObjects() that has just one entry: a dict. This way if we need to add more parameters in the future, some of which may not exist (the "Unknown" ones). This way older scripts will continue working with newer perf tools, they just won't process the new stuff. I.e. when adding features make sure that old scripts works with newer perf tools and vice versa as much as possible. If not possible, add notes to the relevant tools/perf/Documentation/ file. - Arnaldo