Re: [PATCH] perf tools: Exit recording if events have non matchingsample type

From: David Ahern
Date: Tue Oct 04 2011 - 00:15:11 EST

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?

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