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[46.114.159.71]) by smtp.googlemail.com with ESMTPSA id j4sm7844238wmo.10.2021.03.19.19.44.07 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 19 Mar 2021 19:44:08 -0700 (PDT) From: =?utf-8?Q?Klaus_K=C3=BCchemann?= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.60.0.2.21\)) Subject: Re: RPI4 clock speeds and serial port ( temperatures idle and -j4 buildworld buildkernel ) Date: Sat, 20 Mar 2021 03:44:06 +0100 References: <20210318170053.GA26688@www.zefox.net> <9FFA0A51-C0B7-4121-95CA-B98669809007@yahoo.com> <81AC0353-258C-41C3-86B1-C133E33D97E3@yahoo.com> <20210319174359.GA38899@www.zefox.net> <20210319195019.GA39087@www.zefox.net> <20210320005302.GA40542@www.zefox.net> To: bob prohaska , freebsd-arm@freebsd.org, Mark Millard In-Reply-To: <20210320005302.GA40542@www.zefox.net> Message-Id: <81CB0CCA-59AC-49A2-9372-4E2C22E3214D@googlemail.com> X-Mailer: Apple Mail (2.3654.60.0.2.21) X-Rspamd-Queue-Id: 4F2Q7v69rMz4p5Z X-Spamd-Bar: - X-Spamd-Result: default: False [-1.50 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; FREEMAIL_FROM(0.00)[googlemail.com]; MV_CASE(0.50)[]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[googlemail.com:+]; DMARC_POLICY_ALLOW(-0.50)[googlemail.com,quarantine]; FREEMAIL_TO(0.00)[www.zefox.net,freebsd.org,yahoo.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[googlemail.com]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; MID_RHS_MATCH_FROM(0.00)[]; RBL_DBL_DONT_QUERY_IPS(0.00)[2a00:1450:4864:20::32f:from]; DWL_DNSWL_NONE(0.00)[googlemail.com:dkim]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[googlemail.com:s=20161025]; RECEIVED_SPAMHAUS_PBL(0.00)[46.114.159.71:received]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; NEURAL_SPAM_SHORT(1.00)[0.999]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-arm@freebsd.org]; SPAMHAUS_ZRD(0.00)[2a00:1450:4864:20::32f:from:127.0.2.255]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::32f:from]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-arm] X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Porting FreeBSD to ARM processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 20 Mar 2021 02:44:12 -0000 > Am 20.03.2021 um 01:53 schrieb bob prohaska : >=20 > Powerd does seem to affect the apparent speed of the Pi, > and seems to make it run a bit hotter, though I've not > paid enough attention to know by how much. Trying another > buildworld/kernel to get a sense of average speed. >=20 > By any chance, was powerd enabled by default in the distant > (year or so) past? Things seemed to slow down markedly after=20 > then. I always thought it was due to changes in clang.=20 >=20 as Mark said, powerd isn=E2=80=99t enabled by default in releases , so = the freq is @600 by default. So 17 hours @4x600 . with powerd enabled you should have automatically exactly 4x1500 during = the complete compilation time. sysctl dev.cpu.0.freq will definitely show the current freq. example : using the screen tool: 1. root@generic:# sysctl dev.cpu.0.freq dev.cpu.0.freq: 600 2.: screen Now start =E2=80=9Amake -j4 xyz=E2=80=98 Ctrl-a-d to detach screen 3. root@generic:# sysctl dev.cpu.0.freq dev.cpu.0.freq: 1500 by requesting cpu-power, it is automatically scaled. I didn`t test how powerd handles manually overclocking or sdram_freq = etc.,=20 perhaps Mark has(or will) test that more . K.