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SubjectRe: clearing filesystem cache for I/O benchmarks
Benjamin Rutt <rutt.4+news@osu.edu> wrote:
>
> How can I purge all of the kernel's filesystem caches, so I can trust
> that my I/O (read) requests I'm trying to benchmark bypass the kernel
> filesystem cache?

Either delete the benchmark test files or, in 2.6, use
fsync+posix_fadvise(POSIX_FADV_DONTNEED);
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