Messages in this thread |  | | | Subject | Re: [PATCH] perf tools: Exit recording if events have non matching sample type | | From | Peter Zijlstra <> | | Date | Tue, 04 Oct 2011 12:00:12 +0200 |
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On Mon, 2011-10-03 at 22:14 -0600, David Ahern wrote: > On 09/30/2011 01:39 AM, Peter Zijlstra wrote: > > On Thu, 2011-09-29 at 17:33 -0600, David Ahern wrote: > >>> For record that means we need to dump each per-sample_id mmap onto a > >>> separate file, i.e. use a directory, etc. > >> > >> That seems like a major re-write of perf. > > > > Well we want to go there anyway. A file per cpu stream can be a lot less > > overhead than one file for all cpu streams. > > > > really it becomes file per cpu stream and per sample type. So a dual > socket, quad core with HT means 16 files per sample type. ie., the > number of files explodes quick. > > I understand the allure for simplicity during the data collection. Has > any thought been given on management of the files in such a scenario? > User specifies a directory path instead of a file path - or both to > handle backward compatibility?
I think the idea was a directory and a script to convert old data files to the new format. But it was a while ago acme and I talked about this.
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