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([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id u2sm7282132wmm.5.2021.03.19.02.41.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 19 Mar 2021 02:41:47 -0700 (PDT) To: Stefan Hajnoczi References: <2d1e40c6-5fa4-271f-5ecc-74da7c04ffea@redhat.com> From: Paolo Bonzini Subject: Re: Serious doubts about Gitlab CI Message-ID: Date: Fri, 19 Mar 2021 10:41:46 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.249, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Thomas Huth , "Daniel P . Berrange" , =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= , qemu-devel , Cleber Rosa , =?UTF-8?Q?Alex_Benn=c3=a9e?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 19/03/21 10:33, Stefan Hajnoczi wrote: > On Thu, Mar 18, 2021 at 09:30:41PM +0100, Paolo Bonzini wrote: >> On 18/03/21 20:46, Stefan Hajnoczi wrote: >>> The QEMU Project has 50,000 minutes of GitLab CI quota. Let's enable >>> GitLab Merge Requests so that anyone can submit a merge request and get >>> CI coverage. >> >> Each merge request consumes about 2500. That won't last long. > > Yikes, that is 41 hours per CI run. I wonder if GitLab's CI minutes are > on slow machines or if we'll hit the same issue with dedicated runners. > It seems like CI optimization will be necessary... Shared runners are 1 vCPU, so it's really 41 CPU hours per CI run. That's a lot but not unheard of. Almost every 2-socket server these days will have at least 50 CPUs; with some optimization we probably can get it down to half an hour of real time, on a single server running 3-4 runners with 16 vCPUs. Paolo