我尝试在python的不同cpu下运行进程,找到了“affinity”模块,但它不起作用。在
Ubuntu 14.04 LTS;Python 2.7;
当我使用
from affinity import set_process_affinity_mask, get_process_affinity_mask
import os
get_process_affinity_mask(os.getpid())
它抛出:
^{pr2}$但手术结束了。但是,下面的\u affinity.c源代码:
/* Enfold Enterprise Server */
/* Copyright(C), 2004-5, Enfold Systems, LLC - ALL RIGHTS RESERVED */
/* Enfold Systems, LLC */
/* 4617 Montrose Blvd., Suite C215 */
/* Houston, Texas 77006 USA */
/* p. +1 713.942.2377 | f. +1 832.201.8856 */
/* www.enfoldsystems.com */
/* info@enfoldsystems.com */
/* Inspired by: */
/* http://www.linuxjournal.com/article/6799 */
#include "Python.h"
#include <sched.h>
PyDoc_STRVAR(_affinity__doc__, "Linux Processor Affinity\n");
static PyObject *
get_process_affinity_mask(PyObject *self, PyObject *args)
{
unsigned long cur_mask;
unsigned int len = sizeof(cur_mask);
pid_t pid;
if (!PyArg_ParseTuple(args, "i:get_process_affinity_mask", &pid))
return NULL;
if (sched_getaffinity(pid, len,
(cpu_set_t *)&cur_mask) < 0) {
PyErr_SetFromErrno(PyExc_ValueError);
return NULL;
}
return Py_BuildValue("l", cur_mask);
}
static PyObject *
set_process_affinity_mask(PyObject *self, PyObject *args)
{
unsigned long new_mask;
unsigned long cur_mask;
unsigned int len = sizeof(new_mask);
pid_t pid;
if (!PyArg_ParseTuple(args, "il:set_process_affinity_mask", &pid, &new_mask))
return NULL;
if (sched_getaffinity(pid, len,
(cpu_set_t *)&cur_mask) < 0) {
PyErr_SetFromErrno(PyExc_ValueError);
return NULL;
}
if (sched_setaffinity(pid, len, (cpu_set_t *)&new_mask)) {
PyErr_SetFromErrno(PyExc_ValueError);
return NULL;
}
return Py_BuildValue("l", cur_mask);
}
static PyMethodDef methods[] = {
{"get_process_affinity_mask", get_process_affinity_mask, METH_VARARGS,
"get_process_affinity_mask(pid) ->\n\
Get the process affinity mask of 'pid'.\n\n\
You can get the affinity mask of any process running\n\
in the system, even if you are not the process owner."},
{"set_process_affinity_mask", set_process_affinity_mask, METH_VARARGS,
"set_process_affinity_mask(pid, affinity_mask) ->\n\
Set the process affinity mask of 'pid' to 'affinity_mask'\n\
and return the previous affinity mask.\n\n\
If the PID is set to zero, the PID of the current task is used.\n\n\
Note: you must be 'root' or the owner of 'pid' in\n\
order to be able to call this."},
{NULL, NULL},
};
PyMODINIT_FUNC
init_affinity(void)
{
Py_InitModule3("_affinity", methods, _affinity__doc__);
}
问题发生在哪里?如何使进程以其他方式在选定的CPU内核上工作?在
从
sched_getaffinity(2)
手册页:考虑使用
cpu_set_t
作为掩码,使用size_t
作为长度,而不是猜测它可能有多长。在相关问题 更多 >
编程相关推荐