From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: Thomas Monjalon <thomas.monjalon@6wind.com>
Cc: yuanhan.liu@linux.intel.com, john.mcnamara@intel.com,
zhiyong.yang@intel.com, dev@dpdk.org, fbaudin@redhat.com
Subject: Re: [dpdk-dev] [PATCH] doc: introduce PVP reference benchmark
Date: Mon, 28 Nov 2016 15:02:50 +0100 [thread overview]
Message-ID: <a85125cc-2908-c802-f099-1170416a90bd@redhat.com> (raw)
In-Reply-To: <2842042.7AjAPCMeNN@xps13>
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
next prev parent reply other threads:[~2016-11-28 14:02 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-23 21:00 Maxime Coquelin
2016-11-24 5:07 ` Yuanhan Liu
2016-11-24 7:35 ` Maxime Coquelin
2016-11-29 10:16 ` Yuanhan Liu
2016-11-29 10:29 ` Maxime Coquelin
2016-11-24 11:58 ` Kevin Traynor
2016-11-24 12:39 ` Maxime Coquelin
2016-11-24 17:38 ` Mcnamara, John
2016-11-25 9:29 ` Maxime Coquelin
2016-11-28 11:22 ` Thomas Monjalon
2016-11-28 14:02 ` Maxime Coquelin [this message]
2016-11-28 14:15 ` Thomas Monjalon
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