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Peter Anvin" , Ingo Molnar , James Morse , "Jason A. Donenfeld" , Jason Gunthorpe , Jonathan Corbet , Masami Hiramatsu , Michael Ellerman , Michael Larabel , Mike Rapoport , Nicholas Piggin , Oliver Upton , Paul Mackerras , Peter Xu , Sean Christopherson , Steven Rostedt , Suzuki K Poulose , Thomas Gleixner , Thomas Huth , Will Deacon , Zenghui Yu , kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-trace-kernel@vger.kernel.org, x86@kernel.org, linux-mm@google.com Subject: Re: kvm/arm64: Spark benchmark In-Reply-To: <20230609005935.42390-1-yuzhao@google.com> References: <20230526234435.662652-1-yuzhao@google.com> <20230609005935.42390-1-yuzhao@google.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/28.2 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 93.30.5.152 X-SA-Exim-Rcpt-To: yuzhao@google.com, akpm@linux-foundation.org, pbonzini@redhat.com, apopple@nvidia.com, anup@brainfault.org, bgardon@google.com, bp@alien8.de, catalin.marinas@arm.com, chao.p.peng@linux.intel.com, christophe.leroy@csgroup.eu, dave.hansen@linux.intel.com, farosas@linux.ibm.com, cuigaosheng1@huawei.com, gshan@redhat.com, hpa@zytor.com, mingo@redhat.com, james.morse@arm.com, Jason@zx2c4.com, jgg@ziepe.ca, corbet@lwn.net, mhiramat@kernel.org, mpe@ellerman.id.au, michael@michaellarabel.com, rppt@kernel.org, npiggin@gmail.com, oliver.upton@linux.dev, paulus@ozlabs.org, peterx@redhat.com, seanjc@google.com, rostedt@goodmis.org, suzuki.poulose@arm.com, tglx@linutronix.de, thuth@redhat.com, will@kernel.org, yuzenghui@huawei.com, kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-trace-kernel@vger.kernel.org, x86@kernel.org, linux-m m@google.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 062911400CE X-Stat-Signature: 1enjqp1xqnm8qfydurzfk7b8dksd7md5 X-Rspam-User: X-HE-Tag: 1686315875-77421 X-HE-Meta: U2FsdGVkX19qbPZTwzaVjJYoVlxXOPB0Dtqtmd3QFxbiIfNFqkavc6fOfzEFatTSkvFZM5pfA08X9HX97Yy+Y/vjjPm6dSDg8gpTFRMkKIaoDYO0vIbNO2J0IDVgzoUlvWYEiUnDG4fKg1jjAAWONM3m24rgwYEXREJ493ElglBGcL69GWw8t99H8G5z64i9wbTboN8400qeI28kByGf+Oqag6MSQLItBdd9vp2lH9ImKNdsAAgnEkQ5aUQJNmbeqHOYnbsKQbrvItSYgQO6ea+J8RGNY0O6VQQXSYSELIytn1A46wt8bbzZnvroBYXe7lM4XU6dT/tqL9EL49CbZchGYTz3gEVgg5MQ0wSkr6D0/ERbMfvj2z+zvtTEY9hpSkSiyK6nYs682utp5nS2QQ8lzPU6ISTfP9CZfLtUn2LcGiSHWK99u12gr+bjfoJaedW9uBpBs650MGxDBG4Hju9hsqt8Dliz8H2WODnMHPn0VQuGqLT3uIxk13cPwbXmq49D3aBh1UqiTLAZxpuNEeuSKhT6BeMdrrbW4Cq1JpnHuG7ro5ZoDImW5r484S+vcZwkfcLDxNoiT6YtOK1W0rNWYOxh2J0SjQYd826N0wmUmiHUV5mbsFmXqvnS5L+NIXlSfGj6eR8zmApCHwblCet894jKx9KS08zXuSzbquq+DDlaWD198YmWzTvo2BVFGNP445JGn0lPDsXvoXhSmjJgJ9j/XEFph0V/c34lFITKJBmFRVOocyQ3wvc9k/mDCCvmxUozbcrzW2QWwf9W55tSHmqjw84rv55xd1ZqCvYMH9MUyItFjOGacLhzJkVupqv+oTgh3mdLmmjWtNBDZ8YLBOOPPbvCJJs6qPr/xG1Ygs7GttY/Z0mF/2iUjuWBzILJOHu8gF5umkEumGbD4HqA36Ia7rXNz/SUxM7j3F3o1PFYwY2lHjQNElc69IvXaThGh+QVJKo719YbPwT 9WK4EDfS Sel13ynIQJyXRCADvxX1LzP4RWhzTWpSTs/5aRi3xX6gIr75BdfIvaNedK6HkG1EpyojDWsO7drZfdh9GFqrKW0AYcFNt8EXkLQOxEwlxHsvxD8OtqSKEA+BeWotXo98xtm5t8OSLRR8//o7j2zQ65B9qynvYg7kKsHpFpeRnOTuDe6fHyifkVcLjaJ4gbZITbMQFhWZiTAkdokybgjkhSNrbPQ0uFwWFEPCSe5u9pQTTHXfkot/zlPVkrhxGWXB0zcYDWjM1esIunUbtXYHjQsxf1QFz9U9wIspy2lPkGW8t8FEYqSB7hcr6Rw== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, 09 Jun 2023 01:59:35 +0100, Yu Zhao wrote: > > TLDR > ==== > Apache Spark spent 12% less time sorting four billion random integers twenty times (in ~4 hours) after this patchset [1]. Why are the 3 architectures you have considered being evaluated with 3 different benchmarks? I am not suspecting you to have cherry-picked the best results, but I'd really like to see a variety of benchmarks that exercise this stuff differently. Thanks, M. -- Without deviation from the norm, progress is not possible.