From mboxrd@z Thu Jan  1 00:00:00 1970
From: Maxime Coquelin <maxime.coquelin@redhat.com>
Subject: Re: [PATCH] doc: introduce PVP reference benchmark
Date: Mon, 28 Nov 2016 15:02:50 +0100
Message-ID: <a85125cc-2908-c802-f099-1170416a90bd@redhat.com>
References: <20161123210006.7113-1-maxime.coquelin@redhat.com>
 <2842042.7AjAPCMeNN@xps13>
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Cc: yuanhan.liu@linux.intel.com, john.mcnamara@intel.com,
 zhiyong.yang@intel.com, dev@dpdk.org, fbaudin@redhat.com
To: Thomas Monjalon <thomas.monjalon@6wind.com>
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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?

Thanks,
Maxime