Messages in this thread | | | Date | Sun, 26 Jun 2005 16:49:39 -0700 | From | Andrew Morton <> | Subject | Re: increased translation cache footprint in v2.6 |
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Marcelo Tosatti <marcelo.tosatti@cyclades.com> wrote: > > As can be seen the number of entries is more than twice (dominated by kernel addresses).
But doesn't this:
I-TLB userspace misses: 142369 I-TLB userspace misses: 2179 ITLB u: 139190 I-TLB kernel misses: 118288 I-TLB kernel misses: 1369 ITLB k: 116319 D-TLB userspace misses: 222916 D-TLB userspace misses: 180249 DTLB u: 38667 D-TLB kernel misses: 207773 D-TLB kernel misses: 167236 DTLB k: 38273
mean that we're mainly missing on data accesses?
> Sorry, I've got no list of functions for these addresses, but it was pretty obvious at the time > looking at the sys_read() codepath and respective virtual addresses. > > Manual reorganization of the functions sounded too messy, although BenL mentions something about > fget_light() can and should be optimized.
The workload you're using also does write(), and the write() paths got significantly deeper.
Stack misses, perhaps. But a tlb entry caches the translation for a single page, yes? - 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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