Re: [PATCH md-6.13] md: remove bitmap file support

From: Dragan Milivojević
Date: Tue Nov 12 2024 - 20:25:38 EST


On 13/11/2024 02:18, Yu Kuai wrote:
ram0:            981MiB/s
non-bitmap:        132MiB/s
internal-bitmap:    95.5MiB/s



So, I waited for Paul to have a chance to give it a test for real disks,
still, results are similar to above.

That is interesting. How are you running those tests?
I should try them on my hardware as well.


You can see examples here:

https://github.com/brendangregg/FlameGraph

To be short, while test is running:

perf record -a -g -- sleep 10
perf script -i perf.data | ./stackcollapse-perf.pl | ./flamegraph.pl

BTW, you said that you're using production environment, this will
probably make it hard to analyze performance.

I may be able to move things around for the weekend, we will see.

Thanks
Dragan