Messages in this thread | | | Date | Wed, 26 Jan 2022 20:22:52 -0500 (EST) | From | Mathieu Desnoyers <> | Subject | rseq vcpu_id ideas |
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Hi Paul,
I remember our LPC discussions about your virtual cpu ids ideas, and noticed some tcmalloc code with "prototype" fields for vcpu_id and numa node id (https://github.com/google/tcmalloc/blob/master/tcmalloc/internal/linux_syscall_support.h#L34).
I'm currently toying with ideas very close to vcpu_ids to solve issues with overzealous memory allocation for LTTng-UST (user-space tracer) in use-cases where containers use few cores.
My current thinking is that we could use your vcpu_id idea, but apply it on a per-pid-namespace basis rather than per-process. We may have to be clever with NUMA as well to ensure good NUMA locality.
Do you have any thought about this, and perhaps some prototype rseq extension code you could share as a starting point ?
Thanks,
Mathieu
-- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com
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