Re: [dpdk-dev] [PATCH] doc: introduce PVP reference benchmark

[Thomas Monjalon <thomas.monjalon@6wind.com>]

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@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