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Hermes SMTP Server) with ESMTPA ID 245aa8c09cf54149b347de3824affa7f; Mon, 23 Oct 2023 04:42:15 +0000 (UTC) From: Mark Millard Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3774.100.2.1.4\)) Subject: Re: ThreadRipper 1950X context: example kldload amdtemp related temperature reports for idle conditions? Date: Sun, 22 Oct 2023 21:42:03 -0700 References: <22EFB7F1-F51A-4B07-8C9F-2B6189B410F0@yahoo.com> To: FreeBSD Hackers In-Reply-To: <22EFB7F1-F51A-4B07-8C9F-2B6189B410F0@yahoo.com> Message-Id: <4FA3FA86-38A6-43C6-8DBE-075C25248E93@yahoo.com> X-Mailer: Apple Mail (2.3774.100.2.1.4) X-Spamd-Bar: -- X-Spamd-Result: default: False [-2.47 / 15.00]; SUBJECT_ENDS_QUESTION(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.97)[-0.974]; MV_CASE(0.50)[]; DMARC_POLICY_ALLOW(-0.50)[yahoo.com,reject]; R_DKIM_ALLOW(-0.20)[yahoo.com:s=s2048]; R_SPF_ALLOW(-0.20)[+ptr:yahoo.com]; MIME_GOOD(-0.10)[text/plain]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; BLOCKLISTDE_FAIL(0.00)[98.137.69.32:server fail]; RCVD_TLS_LAST(0.00)[]; MLMMJ_DEST(0.00)[freebsd-hackers@freebsd.org]; RCVD_IN_DNSWL_NONE(0.00)[98.137.69.32:from]; RCVD_VIA_SMTP_AUTH(0.00)[]; DWL_DNSWL_NONE(0.00)[yahoo.com:dkim]; RWL_MAILSPIKE_POSSIBLE(0.00)[98.137.69.32:from]; DKIM_TRACE(0.00)[yahoo.com:+]; TO_DN_ALL(0.00)[]; FREEMAIL_FROM(0.00)[yahoo.com]; ARC_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FREEMAIL_ENVFROM(0.00)[yahoo.com]; MIME_TRACE(0.00)[0:+]; MID_RHS_MATCH_FROM(0.00)[]; ASN(0.00)[asn:36647, ipnet:98.137.64.0/20, country:US]; RCVD_COUNT_TWO(0.00)[2] X-Rspamd-Queue-Id: 4SDMxD40bcz4QKh On Oct 22, 2023, at 14:33, Mark Millard wrote: > Is anyone familiar with what what they normally see on an idle > ThreadRipper 1950X via the likes of (presumes kldload amdtemp > had already been done): > > # sysctl dev.amdtemp | grep "[0-9]\.[0-9]C$" > > (Approximate ambient air temperature for the context would be a > bonus.) > > I do not have a history of monitoring this, unfortunately. What I see for idle vs all hardware threads fully busy (buildworld -j32 's llvm lib* build activity): fully busy: about 95 degC reported idle: low 60's degC reported, say 62 degC: (varies more than the 95 figure does) # sysctl dev.amdtemp | grep "[0-9]\.[0-9]C$" dev.amdtemp.1.core0.sensor0: 62.1C dev.amdtemp.0.ccd0: 62.5C dev.amdtemp.0.core0.sensor0: 62.1C AMD's published 1950X maximum operating Tjmax is 68 degC. The max reported figure's delta vs. documented maximum: about 95 degC - 68 degC = 27 degC Various notes on the web report that in order for the tCTL used for fan control to have about the same maximum across various machines, ThreadRipper 1950X's use: tCTL = operatingTjmax + 27 degC So, it looks like the dev.amdtemp reported values are tCTL-like for units, so biased toward fan control use. Idle shifted similarly down from reported: 62 degC - 27 degC = about 35 degC Overall: it seems I'm seeing a range for idle through fully-busy of about (operatingTjmax): 35 degC .. 68 degC but reported as more like (tCTL): 62 degC .. 95 degC === Mark Millard marklmi at yahoo.com