Re: [PATCH] perf record: mmap output file - v2

From: Ingo Molnar
Date: Tue Oct 15 2013 - 03:45:01 EST



* Namhyung Kim <namhyung@xxxxxxxxxx> wrote:

> [SNIP]
> > +/* mmap file big chunks at a time */
> > +#define MMAP_OUTPUT_SIZE (64*1024*1024)
>
> Why did you choose 64MB for the size? Did you also test other sizes?

Btw., should this value go up if the ring buffer (mmap_pages) is larger
than 64MB?

Thanks,

Ingo
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