Path: csiph.com!newsfeed.xs4all.nl!newsfeed9.news.xs4all.nl!bofh.it!news.nic.it!robomod From: Dan Ritter Newsgroups: linux.debian.user Subject: Re: Non-working CPU cores showing up Date: Tue, 30 Nov 2021 12:50:02 +0100 Message-ID: References: X-Original-To: "Paul M. Foster" X-Mailbox-Line: From debian-user-request@lists.debian.org Tue Nov 30 11:42:15 2021 Old-Return-Path: X-Amavis-Spam-Status: No, score=-7 tagged_above=-10000 required=5.3 tests=[BAYES_00=-2, LDO_WHITELIST=-5] autolearn=ham autolearn_force=no X-Policyd-Weight: using cached result; rate: -4.6 X-Message-Flag: Cannot contact reaper.nsa.gov. Trying bucket.cia.gov.. X-Clacks-Overhead: GNU Terry Pratchett MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Mailing-List: archive/latest/783316 List-ID: List-URL: List-Archive: https://lists.debian.org/msgid-search/20211130112428.du5npkzjxyjuvjxe@randomstring.org Approved: robomod@news.nic.it Lines: 33 Organization: linux.* mail to news gateway Sender: robomod@news.nic.it X-Original-Cc: debian-user@lists.debian.org X-Original-Date: Tue, 30 Nov 2021 06:24:28 -0500 X-Original-Message-ID: <20211130112428.du5npkzjxyjuvjxe@randomstring.org> X-Original-References: Xref: csiph.com linux.debian.user:242549 Paul M. Foster wrote: > Folks: > > Here's a curious thing. I have a 10th gen Intel i3 CPU with four cores. When > I look at /proc/cpuinfo, it actually shows eight cores. There's a line in > the output of each core which is > > cpu cores : 4 > > But there are outputs for each of eight cores, numbered 0 through 7. > > Is it possible that there were eight cores on this CPU, and four of them > were non-working (I know it's typical to have non-working cores on a die), > and this file shows all the original cores? > > Or does someone have a better explanation? > Try lscpu. Useful lines: CPU(s): 12 On-line CPU(s) list: 0-11 Thread(s) per core: 2 Core(s) per socket: 6 Socket(s): 1 So this machine has one socket, 6 cores in the socket, 2 threads per core, which looks like 12 CPUs. You should find that your has one socket, 4 cores in the socket, 2 threads per core, which looks like 8 CPUs. -dsr-