2016-11-28 15:02, Maxime Coquelin:
>
> 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?
Perfect, thanks
