From nobody Mon Jul 15 22:37:41 2024 X-Original-To: freebsd-questions@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4WNHCJ556Tz5QLXV for ; Mon, 15 Jul 2024 22:37:48 +0000 (UTC) (envelope-from freebsd-questions@m.gmane-mx.org) Received: from ciao.gmane.io (ciao.gmane.io [116.202.254.214]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4WNHCH4kHgz41kS for ; Mon, 15 Jul 2024 22:37:47 +0000 (UTC) (envelope-from freebsd-questions@m.gmane-mx.org) Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=gmail.com (policy=none); spf=pass (mx1.freebsd.org: domain of freebsd-questions@m.gmane-mx.org designates 116.202.254.214 as permitted sender) smtp.mailfrom=freebsd-questions@m.gmane-mx.org Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1sTUKI-0002Qv-7q for freebsd-questions@freebsd.org; Tue, 16 Jul 2024 00:37:46 +0200 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-questions@freebsd.org From: Anton Shepelev Subject: Cannot seem to throttle individual cores with hwpstate_intel Date: Tue, 16 Jul 2024 01:37:41 +0300 Message-ID: <20240716013741.17158bb56952618f8d748515@gmail.com> List-Id: User questions List-Archive: https://lists.freebsd.org/archives/freebsd-questions List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-questions@freebsd.org Sender: owner-freebsd-questions@FreeBSD.org Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Newsreader: Sylpheed 3.7.0 (GTK+ 2.24.30; i686-pc-mingw32) X-Spamd-Bar: + X-Spamd-Result: default: False [1.85 / 15.00]; NEURAL_SPAM_LONG(1.00)[1.000]; NEURAL_SPAM_MEDIUM(1.00)[0.998]; NEURAL_HAM_SHORT(-0.85)[-0.853]; MV_CASE(0.50)[]; FORGED_SENDER(0.30)[antontxt@gmail.com,freebsd-questions@m.gmane-mx.org]; R_SPF_ALLOW(-0.20)[+mx]; DMARC_POLICY_SOFTFAIL(0.10)[gmail.com : SPF not aligned (relaxed), No valid DKIM,none]; MIME_GOOD(-0.10)[text/plain]; ONCE_RECEIVED(0.10)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_FROM(0.00)[gmail.com]; RCVD_COUNT_ONE(0.00)[1]; RCPT_COUNT_ONE(0.00)[1]; MISSING_XM_UA(0.00)[]; ASN(0.00)[asn:24940, ipnet:116.202.0.0/16, country:DE]; R_DKIM_NA(0.00)[]; MLMMJ_DEST(0.00)[freebsd-questions@freebsd.org]; FROM_NEQ_ENVFROM(0.00)[antontxt@gmail.com,freebsd-questions@m.gmane-mx.org]; FROM_HAS_DN(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; TO_DN_NONE(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; TAGGED_FROM(0.00)[]; RCVD_TLS_LAST(0.00)[]; ARC_NA(0.00)[] X-Rspamd-Queue-Id: 4WNHCH4kHgz41kS Hello, all. In order to throttle the Intel Core i3-6006U 2 GHz CPU with four cores in my laptop, I did the following: 1. made sure hwpstate_intel is installed by: dmesg | grep hwpstate 2. disabled package-level control, to control the cores individually: machdep.hwpstate_pkg_ctrl=0 3. executed the following code: i=0 epp=0 while [ $i -lt 4 ]; do sysctl dev.hwpstate_intel.$i.epp=$epp; epp=100 i=$((i+1)); done Now, sysctl has: dev.hwpstate_intel.3.epp: 100 dev.hwpstate_intel.2.epp: 100 dev.hwpstate_intel.1.epp: 100 dev.hwpstate_intel.0.epp: 0 Yet it keeps reporting identical frequencies for all the four cores even without any heavy load: dev.cpu.3.freq: 1990 dev.cpu.1.freq: 1990 dev.cpu.2.freq: 1990 dev.cpu.0.freq: 1990 Is it correct behavior? I expected cores 1-3 to have a lower frequency... Judging by the observable speed and fan noise, the total throttling seems still to be determine by the maximum .epp, i.e. that hwpstate_pkg_ctrl has no effect. How could I verify and (if confimed) fix it?