On Thu, Apr 8, 2021 at 6:19 PM Hadrien Grasland < [email protected]> wrote:
> Le 08/04/2021 à 16:11, Lennart Poettering a écrit : > > On Do, 08.04.21 12:24, Hadrien Grasland ( > [email protected]) wrote: > > > >> Hi everyone, > >> > >> In a scenario where running benchmarks on dedicated hardware is not > >> possible, I'm trying to momentarily cap the I/O bandwidth used by > >> interactive user sessions while benchmarks are running, in order to > improve > >> the stability of said benchmark's I/O performance. > > Is this on cgroupsv1 or cgroupsv2? > > > > IIRC there was some issue that the block io controller wasn't fully > > recursive on cgroupsv1. It should work on cgroupsv2. > > This is on a hybrid cgroup configuration. I (perhaps mistakenly) assumed > that modern systemd (v246) will use the cgroups v2 hierarchy in that > case, even though cgroups v1 is still exposed for compatibility with > older apps. > If e.g. the io controller is exposed through cgroups v1, as far as I know it cannot be simultaneously used through cgroups v2, and vice versa. (Hmm, wasn't there an option to choose which controllers to assign to v1 and which ones to v2?) -- Mantas Mikulėnas
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