From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CE4D316CD30 for ; Mon, 22 Jul 2024 14:26:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.12 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721658398; cv=none; b=iPGb9BOAI4rb/S7vPzMlYxYNGAE7JiBhsdq8sMPBsZ00tr5LtnHcYNZppE68csdM9xuqOmzwA/5tm+fYsSyMnNOS1uKvu1LxHwQR7dFvWBB3iF+mYgBjk8/SI4aZGZdvFCCzCw2FrmprupLSe3zG8rLakTmT/8IFHWTNS6ocyFk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721658398; c=relaxed/simple; bh=OsrIUd37YeYaTA7dO/rYy+a/KCssuHBkjLNEx5suQu0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=HtWUqQfm6y3vMTOC967dZQ0Zf9C5ITQ1ohrmYdVAzb7Dz/6jYPw0m/J1tLGTfgwNX/Zv83MstV3nSVZ4W/Nk0cs8SMrqcfU34dCODWqjpnQ+19WzsBUq+oxdRWliCi8wxkCqorWiljtnyATIf1jGKYdIyDKHW8XZsp5JgGfFgI4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=WxeUGeWV; arc=none smtp.client-ip=198.175.65.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="WxeUGeWV" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1721658397; x=1753194397; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=OsrIUd37YeYaTA7dO/rYy+a/KCssuHBkjLNEx5suQu0=; b=WxeUGeWV8gsWEKj4J1z8TcE/Ct7Ii9t+8e+N6+6lSZ7kQIToB6ydrwM4 L+DZ98z5oud4QQPMnOwUfndzst9Br7bIdfNK3HxSFCKOUn/C9whWXg8Sg o7ByKiz8J+KEdH7TrMDC9AyDA6Az+Reu+6Luni5pMS/E8u1DLbdY29FN5 bLU7gTfmj6a1bM5VfTnb06ta39jMsYZQvSf62mx/swQ3KfEieZcbmBe/0 x6/Qo2bWkQMO3RNt9SIZFB/Hw+5Lwbdo7Zk0Mpf6bhXno2Kl2weI54Ke6 EoQs2PxtLUeODisoPZtB7pjnS2wuQzQnrX9+Uq5/QFuFljRsTKpSH9SSW A==; X-CSE-ConnectionGUID: A+t8T6xsS9W549LZ/TUGuQ== X-CSE-MsgGUID: mpYas/VYSOaVO9PecR/VGg== X-IronPort-AV: E=McAfee;i="6700,10204,11141"; a="30617140" X-IronPort-AV: E=Sophos;i="6.09,228,1716274800"; d="scan'208";a="30617140" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by orvoesa104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jul 2024 07:26:37 -0700 X-CSE-ConnectionGUID: +SEajsCAQSm91RWdetg5tQ== X-CSE-MsgGUID: RxjqKHH3QVySpkXovI9GSA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.09,228,1716274800"; d="scan'208";a="51555979" Received: from liuzhao-optiplex-7080.sh.intel.com (HELO localhost) ([10.239.160.36]) by fmviesa006.fm.intel.com with ESMTP; 22 Jul 2024 07:26:30 -0700 Date: Mon, 22 Jul 2024 22:42:14 +0800 From: Zhao Liu To: Markus Armbruster Cc: Daniel P =?iso-8859-1?Q?=2E_Berrang=E9?= , Eduardo Habkost , Marcel Apfelbaum , Philippe =?iso-8859-1?Q?Mathieu-Daud=E9?= , Yanan Wang , "Michael S . Tsirkin" , Paolo Bonzini , Richard Henderson , Eric Blake , Marcelo Tosatti , Alex =?iso-8859-1?Q?Benn=E9e?= , Peter Maydell , Jonathan Cameron , Sia Jee Heng , qemu-devel@nongnu.org, kvm@vger.kernel.org, qemu-riscv@nongnu.org, qemu-arm@nongnu.org, Zhenyu Wang , Dapeng Mi , Yongwei Ma Subject: Re: [PATCH 8/8] qemu-options: Add the description of smp-cache object Message-ID: References: <20240704031603.1744546-1-zhao1.liu@intel.com> <20240704031603.1744546-9-zhao1.liu@intel.com> <87r0bl35ug.fsf@pond.sub.org> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87r0bl35ug.fsf@pond.sub.org> Hi Markus, On Mon, Jul 22, 2024 at 03:37:43PM +0200, Markus Armbruster wrote: > Date: Mon, 22 Jul 2024 15:37:43 +0200 > From: Markus Armbruster > Subject: Re: [PATCH 8/8] qemu-options: Add the description of smp-cache > object > > Zhao Liu writes: > > > Signed-off-by: Zhao Liu > > This patch is just documentation. The code got added in some previous > patch. Would it make sense to squash this patch into that previous > patch? OK, I'll merge them. > > --- > > Changes since RFC v2: > > * Rewrote the document of smp-cache object. > > > > Changes since RFC v1: > > * Use "*_cache=topo_level" as -smp example as the original "level" > > term for a cache has a totally different meaning. (Jonathan) > > --- > > qemu-options.hx | 58 +++++++++++++++++++++++++++++++++++++++++++++++++ > > 1 file changed, 58 insertions(+) > > > > diff --git a/qemu-options.hx b/qemu-options.hx > > index 8ca7f34ef0c8..4b84f4508a6e 100644 > > --- a/qemu-options.hx > > +++ b/qemu-options.hx > > @@ -159,6 +159,15 @@ SRST > > :: > > > > -machine cxl-fmw.0.targets.0=cxl.0,cxl-fmw.0.targets.1=cxl.1,cxl-fmw.0.size=128G,cxl-fmw.0.interleave-granularity=512 > > + > > + ``smp-cache='id'`` > > + Allows to configure cache property (now only the cache topology level). > > + > > + For example: > > + :: > > + > > + -object '{"qom-type":"smp-cache","id":"cache","caches":[{"name":"l1d","topo":"core"},{"name":"l1i","topo":"core"},{"name":"l2","topo":"module"},{"name":"l3","topo":"die"}]}' > > + -machine smp-cache=cache > > ERST > > > > DEF("M", HAS_ARG, QEMU_OPTION_M, > > @@ -5871,6 +5880,55 @@ SRST > > :: > > > > (qemu) qom-set /objects/iothread1 poll-max-ns 100000 > > + > > + ``-object '{"qom-type":"smp-cache","id":id,"caches":[{"name":cache_name,"topo":cache_topo}]}'`` > > + Create an smp-cache object that configures machine's cache > > + property. Currently, cache property only include cache topology > > + level. > > + > > + This option must be written in JSON format to support JSON list. > > Why? I'm not familiar with this, so I hope you could educate me if I'm wrong. All I know so far is for -object that defining a list can only be done in JSON format and not with a numeric index like a keyval based option, like: -object smp-cache,id=cache0,caches.0.name=l1i,caches.0.topo=core: Parameter 'caches' is missing the above doesn't work. Is there any other way to specify a list in command line? > > + > > + The ``caches`` parameter accepts a list of cache property in JSON > > + format. > > + > > + A list element requires the cache name to be specified in the > > + ``name`` parameter (currently ``l1d``, ``l1i``, ``l2`` and ``l3`` > > + are supported). ``topo`` parameter accepts CPU topology levels > > + including ``thread``, ``core``, ``module``, ``cluster``, ``die``, > > + ``socket``, ``book``, ``drawer`` and ``default``. The ``topo`` > > + parameter indicates CPUs winthin the same CPU topology container > > + are sharing the same cache. > > + > > + Some machines may have their own cache topology model, and this > > + object may override the machine-specific cache topology setting > > + by specifying smp-cache object in the -machine. When specifying > > + the cache topology level of ``default``, it will honor the default > > + machine-specific cache topology setting. For other topology levels, > > + they will override the default setting. > > + > > + An example list of caches to configure the cache model (l1d cache > > + per core, l1i cache per core, l2 cache per module and l3 cache per > > + socket) supported by PC machine might look like: > > + > > + :: > > + > > + { > > + "caches": [ > > + { "name": "l1d", "topo": "core" }, > > + { "name": "l1i", "topo": "core" }, > > + { "name": "l2", "topo": "module" }, > > + { "name": "l3", "topo": "socket" }, > > + ] > > + } > > + > > + An example smp-cache object would look like:() > > + > > + .. parsed-literal:: > > + > > + # |qemu_system| \\ > > + ... \\ > > + -object '{"qom-type":"smp-cache","id":id,"caches":[{"name":cache_name,"topo":cache_topo}]}' \\ > > + ... > > ERST >