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From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: Maxime Coquelin <maxime.coquelin@redhat.com>
Cc: yuanhan.liu@linux.intel.com, john.mcnamara@intel.com,
 zhiyong.yang@intel.com, dev@dpdk.org, fbaudin@redhat.com
Date: Mon, 28 Nov 2016 12:22:32 +0100
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Subject: Re: [dpdk-dev] [PATCH] doc: introduce PVP reference benchmark
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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.