On Thu, 18 Apr 2013, Mark Hahn wrote:
>> What problems?
>
> performance, of course. drop_caches is really only sane for benchmarking,
> where you want to control for hot/cold caches.
Indeed.
I thought you might know of harmful instances of which I was unaware.
> otherwise, you're almost certainly better off either letting the kernel
> optimize global caching, and/or fix your application
> to avoid polluting the cache (O_DIRECT, madvise, etc).
>
> chip vendors could provide a drop_caches for CPUs, too, and it would also be
> "non-destructive". afaik, such instructions do exist, and are always
> privileged, for basically DOS-based the same reason.
>
> regards, mark hahn.
>
_______________________________________________
Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing
To change your subscription (digest mode or unsubscribe) visit
http://www.beowulf.org/mailman/listinfo/beowulf
