Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Tue, 13 Jun 2023 13:52:07 +0200
From:   Michal =?utf-8?Q?Koutn=C3=BD?= <mkoutny@suse.com>
To:     Hao Jia <jiahao.os@bytedance.com>
Cc:     tj@kernel.org, lizefan.x@bytedance.com, hannes@cmpxchg.org,
        cgroups@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [External] Re: [PATCH] cgroup: rstat: Simplified
 cgroup_base_stat_flush() update last_bstat logic
Message-ID: <ssbelevnb6zpeeqwcdmbzepl6igw42azaxcfw3sn5zlubmjwl2@3ipsbldccyiy>
References: <20230518124142.57644-1-jiahao.os@bytedance.com>
 <f39b9229-e59c-2b1c-7f3f-1aeedfad44dc@bytedance.com>
 <5g73i4yvi4ub4dqrf4dnq5qghkyckoygmgd2st6be3gg7twww2@w6zim6nxpt3b>
 <4d49f7e7-2488-9690-258e-34e617cfef6f@bytedance.com>
 <remnwctqmxleig7ywt6puhxnpmzjo7xm6hlfhpnul46ulfnw7j@36sbuxhuatto>
 <d6d19a61-a584-1839-e6cc-ea63479ca800@bytedance.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <d6d19a61-a584-1839-e6cc-ea63479ca800@bytedance.com>
Precedence: bulk

On Mon, Jun 12, 2023 at 11:13:41AM +0800, Hao Jia <jiahao.os@bytedance.com> wrote:
> Sorry for replying you so late. I am using RDTSC on my machine (an Intel
> Xeon(R) Platinum 8260 CPU@2.40GHz 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