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[Question #254386]: Writing something else than 0 in memory ?

To: sysbench-developers@xxxxxxxxxxxxxxxxxxx
From: Erwan Velu <question254386@xxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 12 Sep 2014 09:18:36 -0000
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New question #254386 on sysbench:
https://answers.launchpad.net/sysbench/+question/254386

I'm running sysbench in a cloud infrastructure (VMs) and I do have some strange results which sounds much more higher than expected.

I'm running the memory bench in write mode by 128M block size. While reading the code, I do see that sysbench is only writting 0 (zeros) to the memory. Isn't that an issue ?

Does KSM or the kernel cannot be in position to fake some results as it was able to merge some requests or dedup them ?

Could it be interesting to have something else than 0 written in memory ? Maybe a random number ?

Thanks for your insight,
Erwan

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