linux-kernel - RE: [PATCH] net: mana: Assign interrupts to CPUs based on NUMA nodes

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Message-ID: <PH7PR21MB31161ED47D7742D5F499BB93CA399@PH7PR21MB3116.namprd21.prod.outlook.com>
Date:   Wed, 2 Nov 2022 13:55:47 +0000
From:   Haiyang Zhang <haiyangz@...rosoft.com>
To:     Saurabh Sengar <ssengar@...ux.microsoft.com>,
        Saurabh Singh Sengar <ssengar@...rosoft.com>,
        KY Srinivasan <kys@...rosoft.com>,
        "wei.liu@...nel.org" <wei.liu@...nel.org>,
        Dexuan Cui <decui@...rosoft.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "pabeni@...hat.com" <pabeni@...hat.com>,
        "colin.i.king@...glemail.com" <colin.i.king@...glemail.com>,
        "vkuznets@...hat.com" <vkuznets@...hat.com>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Michael Kelley (LINUX)" <mikelley@...rosoft.com>
Subject: RE: [PATCH] net: mana: Assign interrupts to CPUs based on NUMA nodes



> -----Original Message-----
> From: Saurabh Sengar <ssengar@...ux.microsoft.com>
> Sent: Tuesday, November 1, 2022 2:06 AM
> To: Saurabh Singh Sengar <ssengar@...rosoft.com>; KY Srinivasan
> <kys@...rosoft.com>; Haiyang Zhang <haiyangz@...rosoft.com>;
> wei.liu@...nel.org; Dexuan Cui <decui@...rosoft.com>;
> davem@...emloft.net; edumazet@...gle.com; kuba@...nel.org;
> pabeni@...hat.com; ssengar@...ux.microsoft.com;
> colin.i.king@...glemail.com; vkuznets@...hat.com; linux-
> hyperv@...r.kernel.org; netdev@...r.kernel.org; linux-
> kernel@...r.kernel.org; Michael Kelley (LINUX) <mikelley@...rosoft.com>
> Subject: [PATCH] net: mana: Assign interrupts to CPUs based on NUMA nodes
> 
> In large VMs with multiple NUMA nodes, network performance is usually
> best if network interrupts are all assigned to the same virtual NUMA
> node. This patch assigns online CPU according to a numa aware policy,
> local cpus are returned first, followed by non-local ones, then it wraps
> around.
> 
> Signed-off-by: Saurabh Sengar <ssengar@...ux.microsoft.com>

Reviewed-by: Haiyang Zhang <haiyangz@...rosoft.com>

Thank you.