From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4336AC4167B for ; Tue, 28 Nov 2023 23:17:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376370AbjK1XRn (ORCPT ); Tue, 28 Nov 2023 18:17:43 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42750 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229526AbjK1XRm (ORCPT ); Tue, 28 Nov 2023 18:17:42 -0500 Received: from w4.tutanota.de (w4.tutanota.de [81.3.6.165]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 88B0F197; Tue, 28 Nov 2023 15:17:48 -0800 (PST) Received: from tutadb.w10.tutanota.de (unknown [192.168.1.10]) by w4.tutanota.de (Postfix) with ESMTP id 3B8311060171; Tue, 28 Nov 2023 23:17:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1701213467; s=s1; d=well-founded.dev; h=From:From:To:To:Subject:Subject:Content-Description:Content-ID:Content-Type:Content-Type:Content-Transfer-Encoding:Content-Transfer-Encoding:Cc:Cc:Date:Date:In-Reply-To:In-Reply-To:MIME-Version:MIME-Version:Message-ID:Message-ID:Reply-To:References:References:Sender; bh=JqVKyMAMt9Bj6vMHPBXGDNf4LP6ToGp593DuEmyVmVg=; b=DuiXrfuiZatvQK8SRbBUX5h4qnitFshGTibmQ7My96Ji3pbzkj31MwcfRW5yozFF uDBBJIz0cWqEOVfxDIFPzxzzV0xDs4Nc2eqG0gLeyQrjYwO05NKHmzPnzV2QFHTM+rh cKQgd8g3wxhtyDo7abslOqpRazaosNLz75lyydlP65iGOfgWigxMNlJLBN9GAGsUUTv ZcRbRkCk6tL36cjxU9Y2BFeXmIHHr1zw/cWE5j7oqXHIVLb9ADUMYnnJ207eNPc3f4Z yg/hRXpEJ+zUdn+ySfiHtsqFGh6E7injjcbURlpkQl8vO19gyQ/QNcIQ+L7mMG9atBF Ff70xakhLw== Date: Wed, 29 Nov 2023 00:17:47 +0100 (CET) From: Ramses To: Tim Chen Cc: Bagas Sanjaya , Linux Kernel Mailing List , Linux Regressions , Linux Power Management , "Rafael J. Wysocki" , Viresh Kumar , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Yu Chen , Srinivas Pandruvada Message-ID: In-Reply-To: References: <01df8329-06d7-4fd1-9c7a-05296f33231e@gmail.com> Subject: Re: Fwd: Intel hybrid CPU scheduler always prefers E cores MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Nov 29, 2023, 00:10 by tim.c.chen@linux.intel.com: > On Tue, 2023-11-28 at 23:33 +0100, Ramses wrote: > >> I applied the patch on top of 6.6.2, but unfortunately I see more or less the same behaviour as before, with single-threaded CPU-bound tasks running almost exclusively on E cores. >> >> Ramses >> > > I suspect that you may have other issues. I wonder if CPU priorities are getting > assigned properly on your system. > > Saw in the original bugzilla > https://bugzilla.kernel.org/show_bug.cgi?id=218195 > that you don't see /proc/sys/kernel/sched_itmt_enabled which > may be a symptom of such a problem. > > +Srinivas, is there something Ramses can do to help > find out if there are issues with cppc? > > Tim > Yeah I'm getting the impression that something is going wrong on my system. AFAIU, itmt is supposed to be auto-detected and doesn't require additional config? I have the intel ME disabled on my CPU (it came like that from the OEM), I don't know if that can have an effect? Let me know if there's any additional info that I can provide. Ramses