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Andi Kleen <ak@muc.de> writes: > > Thus with "normal" page clear and "nt" page copy routines > > both clear and copy benchmarks run faster than with > > stock kernel, both with small and large working set. > > > > Am I wrong? > > fork is only a corner case. The main case is a process allocating > memory using brk/mmap and then using it. Key point: "using it". This normally involves writes to memory. Most applications don't commonly read memory that they haven't previously written to. (valgrind et al call that behaviour a "bug" :). Given that, I'd say you really don't want the page zero routines touching the cache. Michael. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | |||||||||
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