On Tue, Aug 18, 2020 at 08:00:11PM +0530, Muni Sekhar wrote:
Hi all,
I’ve two identical Linux systems with only kernel differences.
What are the differences in the kernels?
While doing kernel profiling with perf, I got the below mentioned metrics for Scheduler benchmarks.
1st system (older kernel version compared to the other system) benchmark result:
$ perf bench sched messaging -g 64 # Running 'sched/messaging' benchmark: # 20 sender and receiver processes per group # 64 groups == 2560 processes run
Total time: 2.936 [sec]
2nd system benchmark result:
$ perf bench sched messaging -g 64 # Running 'sched/messaging' benchmark: # 20 sender and receiver processes per group # 64 groups == 2560 processes run
Total time: 10.074 [sec]
So as per scheduler benchmark results, clearly a huge difference between two systems. Can anyone suggest to me how to dive deeper to know the root cause for it.
Look a the differences between your different kernels, that would be a great start :) good luck! greg k-h