From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ahern Subject: Re: Perf support for interpreted and Just-In-Time translated olanguages Date: Wed, 10 Dec 2014 11:27:18 -0700 Message-ID: <54889086.4070606@gmail.com> References: <1417810736.5098.11.camel@oc0276584878.ibm.com> <20141209203419.GI4189@kernel.org> <87ppbs4h5k.fsf@tassilo.jf.intel.com> <20141209222203.GD8788@kernel.org> <20141210173228.GA6759@two.firstfloor.org> <54888569.30409@gmail.com> <20141210180529.GB6759@two.firstfloor.org> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pa0-f47.google.com ([209.85.220.47]:60766 "EHLO mail-pa0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932414AbaLJS1V (ORCPT ); Wed, 10 Dec 2014 13:27:21 -0500 Received: by mail-pa0-f47.google.com with SMTP id kq14so3294722pab.6 for ; Wed, 10 Dec 2014 10:27:21 -0800 (PST) In-Reply-To: <20141210180529.GB6759@two.firstfloor.org> Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: Andi Kleen Cc: Arnaldo Carvalho de Melo , Brendan Gregg , Carl Love , Pekka Enberg , "linux-perf-use." On 12/10/14 11:05 AM, Andi Kleen wrote: > On Wed, Dec 10, 2014 at 10:39:53AM -0700, David Ahern wrote: >> On 12/10/14 10:32 AM, Andi Kleen wrote: >>>> From what I understood, how would it insert that event into the >>>> perf.data event stream? Only if it necessarily involved a new mmap, via >>>> the kernel, etc. >>> >>> That's the new interface to be defined. >>> >>> Just write a perf.data? >> >> Pawel Moll's new ioctl -- assumming it gets committed. > > We can't push large volume data -- like line numbers and executable code - > through a ioctl. If you write a separate perf.data file then it has to be merged with the file generated by perf which brings in the perf_clock timestamp problem since timestamps are needed to merge the data sets. David