Usage of group reporting

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On 4/5/12 7:42 AM, "Jens Axboe" <axboe@xxxxxxxxx> wrote:
> Most people don't use the group reporting

Why do you say that?

For example I'm trying to find those parameters (direct-io, fadvise,
number of threads, libaio/mmap/sync, etc.) that give an overall "best
performance" (whatever that means) on a simulated workload.

I'm using group reporting, because I want numbers for the entire system,
not for an individual thread.

Am I using "fio" wrong or is "fio" mostly used for other kinds of

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