[dpdk-dev] [PATCH] doc: introduce PVP reference benchmark
Maxime Coquelin
maxime.coquelin at redhat.com
Mon Nov 28 15:02:50 CET 2016
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
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