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Sun, 28 Sep 2008
Tbench Linux regressions with time.
It was reported, that starting from 2.6.23 Linux kernel has a continuous
network-related regression, which results in more than 20% performance degradation.
I checked it, and got interesting results.
It is better one time to see, than 1000 times to hear it.
Yes, we suck!
I decided to try to fix this issues, and started to bisect 2.6.22->2.6.23 and 2.6.26->2.6.27 on two identical machines, which have 4 logical CPUs (HT enabled) and 4 GB of RAM.
Result was quite surprising: second bisection in the 22->23 froze machine in the middle of the compilation, and first bisection in the 26->27 did not boot. Since I ran it remotely, no progress on this til tomorrow.
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