From owner-freebsd-questions@freebsd.org Wed Jan 4 18:53:36 2017 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id DDC2BC9EA73; Wed, 4 Jan 2017 18:53:36 +0000 (UTC) (envelope-from ricera10@gmail.com) Received: from mail-oi0-f65.google.com (mail-oi0-f65.google.com [209.85.218.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id A4C51146E; Wed, 4 Jan 2017 18:53:36 +0000 (UTC) (envelope-from ricera10@gmail.com) Received: by mail-oi0-f65.google.com with SMTP id f201so75990455oib.0; Wed, 04 Jan 2017 10:53:36 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=pYEomyXITE6CiC/060Ph+LO+ODD1wo2I1VSD4QFj3Ws=; b=AZoveOYAqf9Gp6ltpYpf8i3bc6qLX2j133CFlf/5C2l8HhVkpbnr/s6PhsmsOqA9d1 oAyJ9OIUrqrJNhteCJeJb3W9uvd/etmscDAFJDINDK5VGQFTbv/mTePAn649ZU46dSVV hRNGfOTij0/LjJ9e8m8/eVwfttlAf6JllQB4mGGu98rK7k1Z+YtS8194z+O0+G6R+Gal tCSnPVrdW8w6Y8sLpzr2GIi4SdWh1Y+gYvlEdysht5lSaKi0CwO8TK3BmLtvSUIis67X EFY0pxtEgNEC63ySJhB8B5FsXA3TOcVCpFv4UIKqWyNvSBYRvepHblzHSlaUSzFCAdP9 LVQw== X-Gm-Message-State: AIkVDXJ8ZOB79gZKB0Grd5PFhsJ6Ckkt31jt2WZ2WPoVzmKx3KaXZno67dbZqOg8dfM/Bw== X-Received: by 10.157.9.152 with SMTP id q24mr35195927otd.98.1483556014994; Wed, 04 Jan 2017 10:53:34 -0800 (PST) Received: from mail-oi0-f44.google.com (mail-oi0-f44.google.com. [209.85.218.44]) by smtp.gmail.com with ESMTPSA id 31sm34159147oth.21.2017.01.04.10.53.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 04 Jan 2017 10:53:34 -0800 (PST) Received: by mail-oi0-f44.google.com with SMTP id b126so553919715oia.2; Wed, 04 Jan 2017 10:53:34 -0800 (PST) X-Received: by 10.202.180.193 with SMTP id d184mr31742737oif.132.1483556014338; Wed, 04 Jan 2017 10:53:34 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Eric Joyner Date: Wed, 04 Jan 2017 18:53:23 +0000 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: How many CPU cores does FreeBSD support? To: Shane Ambler , freebsd-questions , FreeBSD Current Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Jan 2017 18:53:37 -0000 Adding freebsd-current, because that's a good idea. I see these lines in the beginning of dmesg: MADT: Ignoring local APIC ID 256 (too high) [907/911] MADT: Ignoring local APIC ID 260 (too high) [906/911] MADT: Ignoring local APIC ID 264 (too high) [905/911] MADT: Ignoring local APIC ID 268 (too high) [904/911] MADT: Ignoring local APIC ID 272 (too high) [903/911] MADT: Ignoring local APIC ID 276 (too high) [902/911] MADT: Ignoring local APIC ID 280 (too high) [901/911] MADT: Ignoring local APIC ID 272 (too high) [903/911] MADT: Ignoring local APIC ID 276 (too high) [902/911] MADT: Ignoring local APIC ID 280 (too high) [901/911] MADT: Ignoring local APIC ID 276 (too high) [902/911] MADT: Ignoring local APIC ID 280 (too high) MADT: Ignoring local APIC ID 284 (too high) MADT: Ignoring local APIC ID 288 (too high) MADT: Ignoring local APIC ID 292 (too high) MADT: Ignoring local APIC ID 296 (too high) MADT: Ignoring local APIC ID 300 (too high) MADT: Ignoring local APIC ID 257 (too high) MADT: Ignoring local APIC ID 261 (too high) MADT: Ignoring local APIC ID 265 (too high) MADT: Ignoring local APIC ID 269 (too high) MADT: Ignoring local APIC ID 273 (too high) MADT: Ignoring local APIC ID 277 (too high) MADT: Ignoring local APIC ID 281 (too high) MADT: Ignoring local APIC ID 285 (too high) MADT: Ignoring local APIC ID 289 (too high) MADT: Ignoring local APIC ID 293 (too high) MADT: Ignoring local APIC ID 297 (too high) MADT: Ignoring local APIC ID 301 (too high) MADT: Ignoring local APIC ID 258 (too high) MADT: Ignoring local APIC ID 262 (too high) MADT: Ignoring local APIC ID 266 (too high) MADT: Ignoring local APIC ID 270 (too high) MADT: Ignoring local APIC ID 274 (too high) MADT: Ignoring local APIC ID 278 (too high) MADT: Ignoring local APIC ID 282 (too high) MADT: Ignoring local APIC ID 286 (too high) MADT: Ignoring local APIC ID 290 (too high) MADT: Ignoring local APIC ID 294 (too high) MADT: Ignoring local APIC ID 298 (too high) MADT: Ignoring local APIC ID 302 (too high) MADT: Ignoring local APIC ID 255 (too high) MADT: Ignoring local APIC ID 259 (too high) MADT: Ignoring local APIC ID 263 (too high) MADT: Ignoring local APIC ID 267 (too high) MADT: Ignoring local APIC ID 271 (too high) MADT: Ignoring local APIC ID 275 (too high) MADT: Ignoring local APIC ID 279 (too high) MADT: Ignoring local APIC ID 283 (too high) MADT: Ignoring local APIC ID 287 (too high) MADT: Ignoring local APIC ID 291 (too high) MADT: Ignoring local APIC ID 295 (too high) MADT: Ignoring local APIC ID 299 (too high) MADT: Ignoring local APIC ID 303 (too high) Copyright (c) 1992-2016 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD is a registered trademark of The FreeBSD Foundation. FreeBSD 11.0-RELEASE-p1 #0 r306420: Thu Sep 29 01:43:23 UTC 2016 root@releng2.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC amd64 FreeBSD clang version 3.8.0 (tags/RELEASE_380/final 262564) (based on LLVM 3.8.0) SRAT: No CPU found for memory domain 1 VT(efifb): resolution 800x600 CPU: Intel(R) Xeon Phi(TM) CPU 7250 @ 1.40GHz (1396.80-MHz K8-class CPU) Origin="GenuineIntel" Id=0x50671 Family=0x6 Model=0x57 Stepping=1 Features=0xbfebfbff Features2=0x7ff8f39f AMD Features=0x2c100800 AMD Features2=0x121 Structured Extended Features=0x1c0d23ab Structured Extended Features2=0x1 XSAVE Features=0x1 TSC: P-state invariant, performance statistics real memory = 223332007936 (212986 MB) avail memory = 216976429056 (206924 MB) Event timer "LAPIC" quality 600 ACPI APIC Table: FreeBSD/SMP: Multiprocessor System Detected: 223 CPUs FreeBSD/SMP: Non-uniform topology It sounds like those MADT errors point to the problem? - Eric On Tue, Jan 3, 2017 at 11:41 PM Shane Ambler wrote: > On 04/01/2017 08:08, Eric Joyner wrote: > > I have an 11.0-RELEASE-p1 system with: > > > > hw.model: Intel(R) Xeon Phi(TM) CPU 7250 @ 1.40GHz > > > > It's got 68 cores, but with 4-way SMT, I think it should show up with 272 > > logical cores on FreeBSD. > > > > However, in both kern.sched.topology_spec and hw.ncpu, it shows there are > > only 223 cores. > > > > Is the limit effectively 223 cores, even though I see some #define MAXCPU > > 256 lines in the source? > > You will probably find freebsd-current a better mailing list for this. > > How many show in dmesg? > > From https://svnweb.freebsd.org/base?view=revision&revision=270223 > Bump MAXCPU on amd64 from 64 to 256. In practice APIC only permits 255 > CPUs (IDs 0 through 254). Getting above that limit requires x2APIC. > > Also note that changing MAXCPU breaks ABI compatability so you will > need to recompile. > https://svnweb.freebsd.org/base?view=revision&revision=284720 > > -- > FreeBSD - the place to B...Software Developing > > Shane Ambler > >