Messages in this thread | | | Date | Mon, 03 Oct 2011 22:14:58 -0600 | From | David Ahern <> | Subject | Re: [PATCH] perf tools: Exit recording if events have non matching sample type |
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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?
David
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