From: "DERUMIER, Alexandre" <alexandre.derumier@groupe-cyllene.com>
To: "pve-devel@lists.proxmox.com" <pve-devel@lists.proxmox.com>
Subject: [pve-devel] qemu + tcmalloc for rbd
Date: Tue, 9 Jan 2024 17:02:28 +0000 [thread overview]
Message-ID: <ac74c5ebc804d276edf8d15c73903c27e3022284.camel@groupe-cyllene.com> (raw)
Hi,
I still have this last year patch pending
https://lists.proxmox.com/pipermail/pve-devel/2023-May/056815.html
to enabled conditionnaly tcmalloc in qemu
It's still required for performance with librbd with last qemu /lirbd
I get a 30-40% performance boost in iops and latency for small
read/writes.
I would like to have a solution in proxmox repo, instead of maintain it
on my side.
Currently, In production, I compile qemu with tcmalloc at build.
This patch serie, allow to do use LD_PRELOAD + disable malloc_trim()
call in qemu.
I'm not expert in C (I re-used code from haproxy, which is doing
exactly the same thing with tcmalloc && trim).
So if somebody can review it, it could be great :)
Another way (maybe safer), is to build 2 binary in same package
(/usr/bin/kvm-tcmalloc && /usr/bin/kvm), and give option to user to
choose it.
next reply other threads:[~2024-01-09 17:02 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-09 17:02 DERUMIER, Alexandre [this message]
2024-01-10 9:12 ` Fiona Ebner
2024-01-10 9:38 ` DERUMIER, Alexandre
2024-01-10 14:53 ` Thomas Lamprecht
2024-01-10 10:15 ` Thomas Lamprecht
2024-01-10 18:29 ` DERUMIER, Alexandre
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