On 11/28/2016 12:22 PM, Thomas Monjalon wrote: > 2016-11-23 22:00, Maxime Coquelin: >> +You can use this qmp-vcpu-pin script to pin vCPUs: >> + >> + .. code-block:: python >> + >> + #!/usr/bin/python >> + # QEMU vCPU pinning tool >> + # >> + # Copyright (C) 2016 Red Hat Inc. >> + # >> + # Authors: >> + # Maxime Coquelin <maxime.coquelin at redhat.com> >> + # >> + # This work is licensed under the terms of the GNU GPL, version 2. See >> + # the COPYING file in the top-level directory >> + import argparse >> + import json >> + import os >> + >> + from subprocess import call >> + from qmp import QEMUMonitorProtocol >> + >> + pinned = [] >> + >> + parser = argparse.ArgumentParser(description='Pin QEMU vCPUs to >> physical CPUs') >> + parser.add_argument('-s', '--server', type=str, required=True, >> + help='QMP server path or address:port') >> + parser.add_argument('cpu', type=int, nargs='+', >> + help='Physical CPUs IDs') >> + args = parser.parse_args() >> + >> + devnull = open(os.devnull, 'w') >> + >> + srv = QEMUMonitorProtocol(args.server) >> + srv.connect() >> + >> + for vcpu in srv.command('query-cpus'): >> + vcpuid = vcpu['CPU'] >> + tid = vcpu['thread_id'] >> + if tid in pinned: >> + print 'vCPU{}\'s tid {} already pinned, >> skipping'.format(vcpuid, tid) >> + continue >> + >> + cpuid = args.cpu[vcpuid % len(args.cpu)] >> + print 'Pin vCPU {} (tid {}) to physical CPU {}'.format(vcpuid, tid, >> cpuid) >> + try: >> + call(['taskset', '-pc', str(cpuid), str(tid)], stdout=devnull) >> + pinned.append(tid) >> + except OSError: >> + print 'Failed to pin vCPU{} to CPU{}'.format(vcpuid, cpuid) >> > > > No please do not introduce such useful script in a doc. > I think it must be a separate file in the DPDK repository or > in the QEMU repository.
Ok. The patch is under review on Qemu ML. While it gets merged, I can add a link to its patchwork ID. Ok for you? Thanks, Maxime