Why I am getting weird benchmark results between 0.99 and 100 percentile

Aleksey Shipilev shade at redhat.com
Thu May 6 05:32:19 UTC 2021


On 5/6/21 7:18 AM, Sarath Babu wrote:
> When I run the JMH benchmark results using simpletime mode getting weird
> benchmark results between 0.99 and 100 percentile, could you please provide
> me a reasons behind.

Define "weird"?

> *Results* :
> Benchmark                                                            Mode
> CacheTest.measureCacheGet:measureCacheGet·p0.999                   sample
>               0.006          ms/op
> CacheTest.measureCacheGet:measureCacheGet·p0.9999                  sample
>             136.839          ms/op
> CacheTest.measureCacheGet:measureCacheGet·p1.00                    sample
>            4487.905          ms/op

These look pretty normal "long tail" values to me.

-- 
Thanks,
-Aleksey



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