From: William L. I. I. <wl...@ho...> - 2003-02-21 19:17:41
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On Fri, Feb 21, 2003 at 02:00:10AM -0800, William Lee Irwin III wrote: > nr_page_table_pages 689 > which amounts to 2756KB RAM used for PTE's, demonstrating large Pagetables are also grossly fragmented. From the same sample: nr_reverse_maps 156027 To preempt the FAQ, this is the number of reverse mappings performed, where one is done for every instantiated non-swap PTE. $ echo $(( (689*1024)/156027.0 )) 4.5218840328917427 So the space flushed down the toilet there is also relatively large. Approximately 4.5 PTE's per pagetable page, or a utilization of: $ echo $(( (100*689)/156027.0 )) 0.44159023758708427 percent. -- wli |