Is there a way to flush the file cache?

From: General Schvantzkoph <schvantzkoph@xxxxxxxxx>
Date: 28 Dec 2006 18:17:25 GMT

I'm writing a system exerciser that checks memory and disk I/O. Is there a
C call that flushes the file cache so that I can be assured that my freads
are coming from the disk and not the RAM. I'm using a sync() but I don't
think that does the whole job, it guarantees that the disk writes happen
but I don't think it clears out the file cache.

Thanks,
.

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