From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A0A54C43613 for ; Thu, 20 Jun 2019 05:55:02 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 785F420B1F for ; Thu, 20 Jun 2019 05:55:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 785F420B1F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:43866 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hdq2H-0002yi-Jv for qemu-devel@archiver.kernel.org; Thu, 20 Jun 2019 01:55:01 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56213) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hdpvg-0005yy-I2 for qemu-devel@nongnu.org; Thu, 20 Jun 2019 01:48:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hdpvf-0001rp-17 for qemu-devel@nongnu.org; Thu, 20 Jun 2019 01:48:12 -0400 Received: from mga05.intel.com ([192.55.52.43]:20328) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hdpvd-0001iJ-3f for qemu-devel@nongnu.org; Thu, 20 Jun 2019 01:48:10 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 19 Jun 2019 22:48:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,395,1557212400"; d="scan'208";a="162243116" Received: from unknown (HELO likexu-E5-2699-v4.sh.intel.com) ([10.239.48.178]) by fmsmga007.fm.intel.com with ESMTP; 19 Jun 2019 22:48:01 -0700 From: Like Xu To: qemu-devel@nongnu.org, Eduardo Habkost Date: Thu, 20 Jun 2019 13:45:25 +0800 Message-Id: <20190620054525.37188-4-like.xu@linux.intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190620054525.37188-1-like.xu@linux.intel.com> References: <20190620054525.37188-1-like.xu@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.43 Subject: [Qemu-devel] [PATCH v4 3/3] vl.c: Add -smp, dies=* command line support and update doc X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: like.xu@intel.com, Marcelo Tosatti Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" For PC target, users could configure the number of dies per one package via command line with this patch, such as "-smp dies=2,cores=4". The parsing rules of new cpu-topology model obey the same restrictions/logic as the legacy socket/core/thread model especially on missing values computing. Signed-off-by: Like Xu --- hw/i386/pc.c | 30 +++++++++++++++++------------- qemu-options.hx | 17 +++++++++-------- vl.c | 3 +++ 3 files changed, 29 insertions(+), 21 deletions(-) diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 092bd10d4d..2ed1b3f8de 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -1548,9 +1548,12 @@ static void pc_new_cpu(PCMachineState *pcms, int64_t apic_id, Error **errp) */ void pc_smp_parse(MachineState *ms, QemuOpts *opts) { + PCMachineState *pcms = PC_MACHINE(ms); + if (opts) { unsigned cpus = qemu_opt_get_number(opts, "cpus", 0); unsigned sockets = qemu_opt_get_number(opts, "sockets", 0); + unsigned dies = qemu_opt_get_number(opts, "dies", 1); unsigned cores = qemu_opt_get_number(opts, "cores", 0); unsigned threads = qemu_opt_get_number(opts, "threads", 0); @@ -1560,24 +1563,24 @@ void pc_smp_parse(MachineState *ms, QemuOpts *opts) threads = threads > 0 ? threads : 1; if (cpus == 0) { sockets = sockets > 0 ? sockets : 1; - cpus = cores * threads * sockets; + cpus = cores * threads * dies * sockets; } else { ms->smp.max_cpus = qemu_opt_get_number(opts, "maxcpus", cpus); - sockets = ms->smp.max_cpus / (cores * threads); + sockets = ms->smp.max_cpus / (cores * threads * dies); } } else if (cores == 0) { threads = threads > 0 ? threads : 1; - cores = cpus / (sockets * threads); + cores = cpus / (sockets * dies * threads); cores = cores > 0 ? cores : 1; } else if (threads == 0) { - threads = cpus / (cores * sockets); + threads = cpus / (cores * dies * sockets); threads = threads > 0 ? threads : 1; - } else if (sockets * cores * threads < cpus) { + } else if (sockets * dies * cores * threads < cpus) { error_report("cpu topology: " - "sockets (%u) * cores (%u) * threads (%u) < " + "sockets (%u) * dies (%u) * cores (%u) * threads (%u) < " "smp_cpus (%u)", - sockets, cores, threads, cpus); + sockets, dies, cores, threads, cpus); exit(1); } @@ -1589,26 +1592,27 @@ void pc_smp_parse(MachineState *ms, QemuOpts *opts) exit(1); } - if (sockets * cores * threads > ms->smp.max_cpus) { + if (sockets * dies * cores * threads > ms->smp.max_cpus) { error_report("cpu topology: " - "sockets (%u) * cores (%u) * threads (%u) > " + "sockets (%u) * dies (%u) * cores (%u) * threads (%u) > " "maxcpus (%u)", - sockets, cores, threads, + sockets, dies, cores, threads, ms->smp.max_cpus); exit(1); } - if (sockets * cores * threads != ms->smp.max_cpus) { + if (sockets * dies * cores * threads != ms->smp.max_cpus) { warn_report("Invalid CPU topology deprecated: " - "sockets (%u) * cores (%u) * threads (%u) " + "sockets (%u) * dies (%u) * cores (%u) * threads (%u) " "!= maxcpus (%u)", - sockets, cores, threads, + sockets, dies, cores, threads, ms->smp.max_cpus); } ms->smp.cpus = cpus; ms->smp.cores = cores; ms->smp.threads = threads; + pcms->smp_dies = dies; } if (ms->smp.cpus > 1) { diff --git a/qemu-options.hx b/qemu-options.hx index 0d8beb4afd..a5b314a448 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -138,25 +138,26 @@ no incompatible TCG features have been enabled (e.g. icount/replay). ETEXI DEF("smp", HAS_ARG, QEMU_OPTION_smp, - "-smp [cpus=]n[,maxcpus=cpus][,cores=cores][,threads=threads][,sockets=sockets]\n" + "-smp [cpus=]n[,maxcpus=cpus][,cores=cores][,threads=threads][,dies=dies][,sockets=sockets]\n" " set the number of CPUs to 'n' [default=1]\n" " maxcpus= maximum number of total cpus, including\n" " offline CPUs for hotplug, etc\n" - " cores= number of CPU cores on one socket\n" + " cores= number of CPU cores on one socket (for PC, it's on one die)\n" " threads= number of threads on one CPU core\n" + " dies= number of CPU dies on one socket (for PC only)\n" " sockets= number of discrete sockets in the system\n", QEMU_ARCH_ALL) STEXI -@item -smp [cpus=]@var{n}[,cores=@var{cores}][,threads=@var{threads}][,sockets=@var{sockets}][,maxcpus=@var{maxcpus}] +@item -smp [cpus=]@var{n}[,cores=@var{cores}][,threads=@var{threads}][,dies=dies][,sockets=@var{sockets}][,maxcpus=@var{maxcpus}] @findex -smp Simulate an SMP system with @var{n} CPUs. On the PC target, up to 255 CPUs are supported. On Sparc32 target, Linux limits the number of usable CPUs to 4. -For the PC target, the number of @var{cores} per socket, the number -of @var{threads} per cores and the total number of @var{sockets} can be -specified. Missing values will be computed. If any on the three values is -given, the total number of CPUs @var{n} can be omitted. @var{maxcpus} -specifies the maximum number of hotpluggable CPUs. +For the PC target, the number of @var{cores} per die, the number of @var{threads} +per cores, the number of @var{dies} per packages and the total number of +@var{sockets} can be specified. Missing values will be computed. +If any on the three values is given, the total number of CPUs @var{n} can be omitted. +@var{maxcpus} specifies the maximum number of hotpluggable CPUs. ETEXI DEF("numa", HAS_ARG, QEMU_OPTION_numa, diff --git a/vl.c b/vl.c index 9218a718f3..e3908caa47 100644 --- a/vl.c +++ b/vl.c @@ -1233,6 +1233,9 @@ static QemuOptsList qemu_smp_opts = { }, { .name = "sockets", .type = QEMU_OPT_NUMBER, + }, { + .name = "dies", + .type = QEMU_OPT_NUMBER, }, { .name = "cores", .type = QEMU_OPT_NUMBER, -- 2.21.0