Re: [RFC bpf-next] Hierarchical Cgroup Stats Collection Using BPF

[Yonghong Song <yhs@fb.com>]

On 3/22/22 2:37 PM, Hao Luo wrote:
> On Tue, Mar 22, 2022 at 11:09 AM Yonghong Song <yhs@fb.com> wrote:
>>
>> Hi, Yosry, I heard this was discussed in bpf office hour which I
>> didn't attend. Could you summarize the conclusion and what is the
>> step forward? We also have an internal tool which collects cgroup
>> stats and this might help us as well. Thanks!
>>
> 
> Hi Yonghong,
> 
> Yosry is out of office this entire week. I don't know whether he has
> access to corp email account, so please allow me to reply on his
> behalf.
> 
> So instead of using rstat in bpf (by providing a map interface), it's
> better to leverage the flexibility provided by bpf to extend rstat.
> "We can achieve a similar outcome with a less intrusive design." Yosry
> "will look at programs providing their own aggregators and maintaining
> their own stats, and only making callbacks to/from rstat." As the next
> step, Yosry is going to work on an RFC patchset to drive the
> discussion, when he is back.
> 
> It's great to see that this is helpful to you as well! I am looking
> forward to collaboration if there is a need.

Thanks, Hao, for explanation. I am looking forward to the RFC patch!

> 
> Hao