Joe Wilson wrote: > Here's a patch to improve the speed of many database-intensive monotone > commands. > > It can shave 70% of the time off of a (cold) checkout, for example.
It might, but it does so violently. It's forcing other data out of the caches. Modern OSes have support for hints to the OS. For mmap() calls on Linux, there is the MAP_POPULATE flag. For all file operations, there is posix_fadvise(). -- ➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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