From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 61BB3A04DD; Fri, 20 Nov 2020 13:55:36 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id EFAD9C8B6; Fri, 20 Nov 2020 13:55:34 +0100 (CET) Received: from lb.pantheon.sk (lb.pantheon.sk [46.229.239.20]) by dpdk.org (Postfix) with ESMTP id 6CD0CC8B4 for ; Fri, 20 Nov 2020 13:55:32 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by lb.pantheon.sk (Postfix) with ESMTP id C442FB9B55; Fri, 20 Nov 2020 13:55:30 +0100 (CET) X-Virus-Scanned: amavisd-new at siecit.sk Received: from lb.pantheon.sk ([127.0.0.1]) by localhost (lb.pantheon.sk [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bgRjAEf4lce0; Fri, 20 Nov 2020 13:55:29 +0100 (CET) Received: from service-node1.lab.pantheon.local (unknown [46.229.239.141]) by lb.pantheon.sk (Postfix) with ESMTP id CC2C4B9B53; Fri, 20 Nov 2020 13:55:24 +0100 (CET) From: =?UTF-8?q?Juraj=20Linke=C5=A1?= To: thomas@monjalon.net, bruce.richardson@intel.com, Honnappa.Nagarahalli@arm.com Cc: dev@dpdk.org, =?UTF-8?q?Juraj=20Linke=C5=A1?= Date: Fri, 20 Nov 2020 13:55:20 +0100 Message-Id: <1605876920-31394-1-git-send-email-juraj.linkes@pantheon.tech> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH v1 1/1] build: optional NUMA and cpu counts detection X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Add an option to automatically discover the host's numa and cpu counts and use those values for a non cross-build. Give users the option to override the per-arch default values or values from cross files by specifying them on the command line with -Dmax_lcores and -Dmax_numa_nodes. Signed-off-by: Juraj Linkeš Reviewed-by: Honnappa Nagarahalli --- MAINTAINERS | 2 ++ buildtools/get-cpu-count.py | 7 ++++++ buildtools/get-numa-count.py | 22 +++++++++++++++++ buildtools/meson.build | 2 ++ config/meson.build | 47 ++++++++++++++++++++++++++++++++++-- config/x86/meson.build | 2 ++ meson_options.txt | 8 +++--- 7 files changed, 84 insertions(+), 6 deletions(-) create mode 100644 buildtools/get-cpu-count.py create mode 100644 buildtools/get-numa-count.py diff --git a/MAINTAINERS b/MAINTAINERS index a720cf672..366b0cf58 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -100,6 +100,8 @@ F: meson_options.txt F: config/ F: buildtools/call-sphinx-build.py F: buildtools/gen-pmdinfo-cfile.sh +F: buildtools/get-cpu-count.py +F: buildtools/get-numa-count.py F: buildtools/list-dir-globs.py F: buildtools/pkg-config/ F: buildtools/symlink-drivers-solibs.sh diff --git a/buildtools/get-cpu-count.py b/buildtools/get-cpu-count.py new file mode 100644 index 000000000..b269d557b --- /dev/null +++ b/buildtools/get-cpu-count.py @@ -0,0 +1,7 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: BSD-3-Clause +# Copyright (c) 2020 PANTHEON.tech s.r.o. + +import os + +print(os.cpu_count()) diff --git a/buildtools/get-numa-count.py b/buildtools/get-numa-count.py new file mode 100644 index 000000000..be73c5c3f --- /dev/null +++ b/buildtools/get-numa-count.py @@ -0,0 +1,22 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: BSD-3-Clause +# Copyright (c) 2020 PANTHEON.tech s.r.o. + +import ctypes +import glob +import os +import subprocess + +if os.name == 'posix': + if os.path.isdir('/sys/devices/system/node'): + print(len(glob.glob('/sys/devices/system/node/node*'))) + else: + subprocess.run(['sysctl', '-n', 'vm.ndomains']) + +elif os.name == 'nt': + libkernel32 = ctypes.windll.kernel32 + + count = ctypes.c_ulong() + + libkernel32.GetNumaHighestNodeNumber(ctypes.pointer(count)) + print(count.value + 1) diff --git a/buildtools/meson.build b/buildtools/meson.build index 04808dabc..4ab67de27 100644 --- a/buildtools/meson.build +++ b/buildtools/meson.build @@ -17,3 +17,5 @@ else endif map_to_win_cmd = py3 + files('map_to_win.py') sphinx_wrapper = py3 + files('call-sphinx-build.py') +get_cpu_count_cmd = py3 + files('get-cpu-count.py') +get_numa_count_cmd = py3 + files('get-numa-count.py') diff --git a/config/meson.build b/config/meson.build index a29693b88..63d8c2747 100644 --- a/config/meson.build +++ b/config/meson.build @@ -232,8 +232,6 @@ foreach arg: warning_flags endforeach # set other values pulled from the build options -dpdk_conf.set('RTE_MAX_LCORE', get_option('max_lcores')) -dpdk_conf.set('RTE_MAX_NUMA_NODES', get_option('max_numa_nodes')) dpdk_conf.set('RTE_MAX_ETHPORTS', get_option('max_ethports')) dpdk_conf.set('RTE_LIBEAL_USE_HPET', get_option('use_hpet')) dpdk_conf.set('RTE_ENABLE_TRACE_FP', get_option('enable_trace_fp')) @@ -252,6 +250,51 @@ compile_time_cpuflags = [] subdir(arch_subdir) dpdk_conf.set('RTE_COMPILE_TIME_CPUFLAGS', ','.join(compile_time_cpuflags)) +max_lcores = get_option('max_lcores') +if max_lcores > 0 + # Overwrite the default value from arch_subdir with user input + dpdk_conf.set('RTE_MAX_LCORE', max_lcores) +elif max_lcores == -1 + # Overwrite the default value with discovered values + if meson.is_cross_build() + error('Discovery of max_lcores is not supported for cross-compilation.') + endif + # Discovery makes sense only for non-cross builds + max_lcores = run_command(get_cpu_count_cmd).stdout().to_int() + min_lcores = 2 + # DPDK must be build for at least 2 cores + if max_lcores < min_lcores + message('Found less than @0@ cores, building for @0@ cores'.format(min_lcores)) + max_lcores = min_lcores + else + message('Found @0@ cores'.format(max_lcores)) + endif + dpdk_conf.set('RTE_MAX_LCORE', max_lcores) +endif + +max_numa_nodes = get_option('max_numa_nodes') +if max_numa_nodes > 0 + # Overwrite the default value from arch_subdir with user input + dpdk_conf.set('RTE_MAX_NUMA_NODES', max_numa_nodes) +elif max_numa_nodes == -1 + # Overwrite the default value with discovered values + if meson.is_cross_build() + error('Discovery of max_numa_nodes not supported for cross-compilation.') + endif + # Discovery makes sense only for non-cross builds + max_numa_nodes = run_command(get_numa_count_cmd).stdout().to_int() + message('Found @0@ numa nodes'.format(max_numa_nodes)) + dpdk_conf.set('RTE_MAX_NUMA_NODES', max_numa_nodes) +endif + +# check that cpu and numa count is set and error out if it's not set +if not dpdk_conf.has('RTE_MAX_LCORE') + error('Number of cores not specified.') +endif +if not dpdk_conf.has('RTE_MAX_NUMA_NODES') + error('Number of numa nodes not specified.') +endif + # set the install path for the drivers dpdk_conf.set_quoted('RTE_EAL_PMD_PATH', eal_pmd_path) diff --git a/config/x86/meson.build b/config/x86/meson.build index 31bfa63b1..4989d47f3 100644 --- a/config/x86/meson.build +++ b/config/x86/meson.build @@ -57,3 +57,5 @@ else endif dpdk_conf.set('RTE_CACHE_LINE_SIZE', 64) +dpdk_conf.set('RTE_MAX_LCORE', 128) +dpdk_conf.set('RTE_MAX_NUMA_NODES', 4) diff --git a/meson_options.txt b/meson_options.txt index e384e6dbb..8e08852cf 100644 --- a/meson_options.txt +++ b/meson_options.txt @@ -24,10 +24,10 @@ option('machine', type: 'string', value: 'native', description: 'set the target machine type') option('max_ethports', type: 'integer', value: 32, description: 'maximum number of Ethernet devices') -option('max_lcores', type: 'integer', value: 128, - description: 'maximum number of cores/threads supported by EAL') -option('max_numa_nodes', type: 'integer', value: 4, - description: 'maximum number of NUMA nodes supported by EAL') +option('max_lcores', type: 'integer', value: 0, + description: 'A positive integer sets the maximum number of cores/threads supported by EAL. The default is per-arch (or cross-compilation) default. Set to -1 to detect the number of cores on the build machine.') +option('max_numa_nodes', type: 'integer', value: 0, + description: 'A positive integer sets maximum number of NUMA nodes supported by EAL. The default is per-arch (or cross-compilation) default. Set to -1 to detect the number of numa nodes on the build machine.') option('enable_trace_fp', type: 'boolean', value: false, description: 'enable fast path trace points.') option('tests', type: 'boolean', value: true, -- 2.20.1