On Thu, Nov 09, 2023 at 08:01:39AM -0800, Alexei Starovoitov wrote:

On Thu, Nov 9, 2023 at 7:49 AM Kirill A. Shutemov [off-list ref] wrote:

quoted

On Tue, Oct 31, 2023 at 02:09:48PM -0700, Jakub Kicinski wrote:

quoted

      bpf: Add support for non-fix-size percpu mem allocation

Recent changes in BPF increased per-CPU memory consumption a lot.

On virtual machine with 288 CPUs, per-CPU consumtion increased from 111 MB
to 969 MB, or 8.7x.

I've bisected it to the commit 41a5db8d8161 ("bpf: Add support for
non-fix-size percpu mem allocation"), which part of the pull request.

Hmm. This is unexpected. Thank you for reporting.

How did you measure this 111 MB vs 969 MB ?
Pls share the steps to reproduce.

Boot VMM with 288 (qemu-system-x86_64 -smp 288) and check Percpu: field of
/proc/meminfo.

-- 
  Kiryl Shutsemau / Kirill A. Shutemov