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Tue, 30 Jul 2024 04:04:24 -0700 (PDT) X-Google-Smtp-Source: AGHT+IE39v1pXN85w2qGztmjiUvkkGOPsZjbJmzMayqH+ReAnENY9kABuKyGJDrx7hXWY7gOyf34nA== X-Received: by 2002:a05:600c:3153:b0:426:5e91:391e with SMTP id 5b1f17b1804b1-42811dcd2e1mr67797975e9.26.1722337464436; Tue, 30 Jul 2024 04:04:24 -0700 (PDT) Received: from [192.168.88.254] ([213.175.51.194]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4280f8da2f7sm143824605e9.10.2024.07.30.04.04.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 30 Jul 2024 04:04:24 -0700 (PDT) Message-ID: <03c24731-e56f-44b2-b0a3-6afd7f14f77b@redhat.com> Date: Tue, 30 Jul 2024 13:04:22 +0200 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: XDP Performance Regression in recent kernel versions To: Carolina Jubran , Dragos Tatulea , Tariq Toukan , "daniel@iogearbox.net" , "hawk@kernel.org" , "mianosebastiano@gmail.com" Cc: "toke@redhat.com" , "pabeni@redhat.com" , "netdev@vger.kernel.org" , "edumazet@google.com" , Saeed Mahameed , "bpf@vger.kernel.org" , "kuba@kernel.org" References: <5b64c89f-4127-4e8f-b795-3cec8e7350b4@kernel.org> <87wmmkn3mq.fsf@toke.dk> <2f8dfd0a25279f18f8f86867233f6d3ba0921f47.camel@nvidia.com> Content-Language: en-US From: Samuel Dobron In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit > Could you try adding the mentioned parameters to your kernel arguments > and check if you still see the degradation? Hey, So i tried multiple kernels around v5.15 as well as couple of previous v6.xx and there is no difference with spectre v2 mitigations enabled or disabled. No difference on other drivers as well. Sam.