tlb shootdown

Ivan Voras ivoras at freebsd.org
Thu Jun 2 15:40:01 UTC 2011


On 2 June 2011 16:24, Andriy Gapon <avg at freebsd.org> wrote:
> on 02/06/2011 15:02 Ivan Voras said the following:
>> On 01/06/2011 13:11, Andriy Gapon wrote:
>>>
>>> Anyone knows of a benchmark/test that can measure/demonstrate difference in tlb
>>> shootdown performance (or its lack)?
>>
>> The "tlb" utility from lmbench may help you.
>
> Just because it's named tlb and I asked for tlb something? :)

No, because it satisfies one thing you asked for:  measuring tlb
shootdown performance:

./tlb -c
tlb: 16 pages 0.75218 nanoseconds

If you look at the code, this is probably exactly what you need: the
difference between the case with tlb misses and without.


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