linux-kernel - Re: [External] Re: [PATCH] cgroup: rstat: Simplified cgroup_base_stat_flush() update last

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Message-ID: <ssbelevnb6zpeeqwcdmbzepl6igw42azaxcfw3sn5zlubmjwl2@3ipsbldccyiy>
Date:   Tue, 13 Jun 2023 13:52:07 +0200
From:   Michal Koutný <mkoutny@...e.com>
To:     Hao Jia <jiahao.os@...edance.com>
Cc:     tj@...nel.org, lizefan.x@...edance.com, hannes@...xchg.org,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [External] Re: [PATCH] cgroup: rstat: Simplified
 cgroup_base_stat_flush() update last_bstat logic

On Mon, Jun 12, 2023 at 11:13:41AM +0800, Hao Jia <jiahao.os@...edance.com> wrote:
> Sorry for replying you so late. I am using RDTSC on my machine (an Intel
> Xeon(R) Platinum 8260 CPU@...0GHz machine with 2 NUMA nodes each of which
> has 24 cores with SMT2 enabled, so 96 CPUs in total.) to compare the time
> consumption of arithmetics vs copying. There is almost no difference in the
> time consumption between arithmetics and copying.

Thanks for carrying out and sharing this despite not convincing towards
the change.

Michal