0

I am doing a school project regarding the Meltdown patches and how it affects performance, and was doing some disk benchmarks (CrystalDiskMark).

Current setup is i5-8600K + Samsung 860Evo 250GB, and to my surprise, the Meltdown patch increased performance... in both Read and Write by very small numbers... (did 3 trials).. I tried the 4KiB Q32 T1 test.

So I reasoned that maybe it's because the CPU is too fast for the SSD and ran a CPU stress test in the background while benchmarking the disks

Even on a PCID disabled laptop, while the read speed decreased by 8%, the write speed increased by 20% (without stress test in background)

and I get 7% decrease in disk performance after the patch (36.85 --> 34.27 / 28.66 -->26.66MB/s)

Is this the correct way to benchmark the performance hit caused by the patch? And why does the patch increase performance at low CPU loads? I read the comments on this post: which said something about these disk benchmarks being bad for QD=1 workloads and were bad in simulating real-life scenarios but I wasn't able to understand what he meant.

Thank you for answering!

Your Answer

By clicking "Post Your Answer", you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.