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[2620:137:e000::1:20]) by mx.google.com with ESMTP id ka22-20020a170907991600b00977d0db2c6asi6070470ejc.63.2023.06.13.01.49.38; Tue, 13 Jun 2023 01:50:03 -0700 (PDT) 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; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=bgk+OBXW; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241264AbjFMIci (ORCPT + 99 others); Tue, 13 Jun 2023 04:32:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43230 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241355AbjFMIcb (ORCPT ); Tue, 13 Jun 2023 04:32:31 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DF6AC199A for ; Tue, 13 Jun 2023 01:32:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=ZLpF5uaE5vEXK70soXXBTsKAuRo8FWQfkbFKAKFSYT8=; b=bgk+OBXW7KObNsaL+te0/3zM6l FeBmWiBjT5yIidb7PY2IJMoTVg/8HDi6igjPC5y7lEiHZlt8WIC8/lhGKKsM4aH8y13P82jUo+Lnb rNTgukeW1c9qX8huTtw1LocfDYnjT9UDZVobYB8hAMaXUD6JybndnYltwlXi0GcLNrT8ZjHpo6SNP O1k0GIFFjcJrdknPMzp61Z02SXReIQ5op7fMOt5D8AxihE2d5tUDmcd4KMyuzjKtAmwBXyETSZ4RK 1Np3DXbTKOhabpgbVJn85cvCkQLgzBdrXkCHUZawP6sThOizbopJemlQO0a180RZFPPML6rMyecbz ySco/46A==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1q8zRd-003hZW-32; Tue, 13 Jun 2023 08:32:05 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id B1D3C3002F0; Tue, 13 Jun 2023 10:32:03 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 8DBF6262C92A6; Tue, 13 Jun 2023 10:32:03 +0200 (CEST) Date: Tue, 13 Jun 2023 10:32:03 +0200 From: Peter Zijlstra To: David Vernet Cc: linux-kernel@vger.kernel.org, mingo@redhat.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, rostedt@goodmis.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, joshdon@google.com, roman.gushchin@linux.dev, tj@kernel.org, kernel-team@meta.com Subject: Re: [RFC PATCH 3/3] sched: Implement shared wakequeue in CFS Message-ID: <20230613083203.GR4253@hirez.programming.kicks-ass.net> References: <20230613052004.2836135-1-void@manifault.com> <20230613052004.2836135-4-void@manifault.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230613052004.2836135-4-void@manifault.com> X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Still gotta read it properly, however: On Tue, Jun 13, 2023 at 12:20:04AM -0500, David Vernet wrote: > Single-socket | 32-core | 2-CCX | AMD 7950X Zen4 > Single-socket | 72-core | 6-CCX | AMD Milan Zen3 > Single-socket | 176-core | 11-CCX | 2-CCX per CCD | AMD Bergamo Zen4c Could you please also benchmark on something Intel that has these stupid large LLCs ? Because the last time I tried something like this, it came apart real quick. And AMD has these relatively small 8-core LLCs.