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#!/usr/bin/python
# -*- coding: utf8 -*-
# author:
# date: 2015-09-15
# see license for license details
import subprocess
import time
import logging
import vstf.agent.perf.utils as utils
import vstf.common.decorator as deco
from vstf.common.utils import my_popen
LOG = logging.getLogger(__name__)
class Pktgen(object):
def __init__(self):
utils.modprobe_pktgen()
self._send_processes = []
def _psetpg(self, dev):
self._dev = dev
def _vsetpg(self, key, value=''):
with open(self._dev, 'w') as f:
txt = "%(key)s %(value)s\n" % {'key': key, 'value': value}
f.write(txt)
LOG.info("write(%s) to %s", txt.strip(), self._dev)
def _start(self):
cmd = 'echo start > /proc/net/pktgen/pgctrl'
process = my_popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
LOG.info('running pid:%s', process.pid)
time.sleep(0.5)
ret = process.poll()
if ret is None:
ret = 0
self._send_processes.append(process)
error_str = "start pktgen send success"
else:
error_str = "start pktgen send failed, stdout:%s,stderr:%s" % (process.stdout.read(), process.stderr.read())
LOG.info(error_str)
return ret, error_str
def _rem_device_all(self):
cpu_num = utils.get_cpu_num()
for thread in range(0, cpu_num - 1):
self._psetpg("/proc/net/pktgen/kpktgend_%s" % thread)
self._vsetpg('rem_device_all')
return True
@deco.check("protocol", choices=['udp_bw'], defaults='udp_bw')
@deco.check("namespace", defaults=None)
@deco.check("dst")
@deco.check("src")
@deco.check("size", defaults=64)
@deco.check("threads", defaults=utils.get_default_threads())
@deco.check("clone_skb", defaults=1)
@deco.check("count", defaults=0)
@deco.check("ratep", defaults=0)
def send_start(self, **kwargs):
# ensure that all sends is exit
self.send_stop()
interface_num = len(kwargs['src'])
interfaces = []
for i in range(interface_num):
device = kwargs['src'][i]['iface']
interfaces.append(device)
utils.iface_up(device)
self._rem_device_all()
threads = kwargs['threads']
for i in range(interface_num):
dev_min = i * threads
dev_max = (i + 1) * threads
device = interfaces[i]
for dev_id in range(dev_min, dev_max):
queue_id = dev_id % threads
self._psetpg("/proc/net/pktgen/kpktgend_%s" % dev_id)
self._vsetpg('add_device', "%s@%s" % (device, queue_id))
self._psetpg("/proc/net/pktgen/%s@%s" % (device, queue_id))
self._vsetpg('pkt_size', kwargs['size'])
self._vsetpg('clone_skb', kwargs['clone_skb'])
self._vsetpg('dst_mac', kwargs['dst'][i]['mac'])
self._vsetpg('src_mac', kwargs['src'][i]['mac'])
self._vsetpg('count', kwargs['count'])
if kwargs['ratep']:
self._vsetpg('ratep', kwargs['ratep'])
return self._start()
def send_stop(self, **kwargs):
results = []
ret = 0
for process in self._send_processes:
process.kill()
process.wait()
LOG.info("process.kill(pktgen:%s)", process.pid)
results.append((ret, process.stdout.read()))
self._send_processes = []
return results
def receive_start(self, **kwargs):
ret = 0
error_str = "%s pktgen neednt receive start" % (self.__class__)
LOG.debug(error_str)
return ret, error_str
def receive_stop(self, **kwargs):
ret = 0
error_str = "pktgen neednt receive stop"
LOG.debug(error_str)
return ret, error_str
def clean(self):
self.send_stop()
return True
def force_clean(self):
LOG.info("%s %s start", self.__class__, self.force_clean.__name__)
return self.clean()
def unit_test():
perf = Pktgen()
print perf.receive_start()
send = {
"src": [
{"iface": 'eth4', "mac": "90:e2:ba:20:1f:d8"}
],
"dst": [
{"mac": '90:e2:ba:20:1f:d9'}
],
"size": 64,
"threads": 1,
'ratep': 0
}
print perf.send_start(**send)
time.sleep(30)
print perf.send_stop()
print perf.receive_stop()
if __name__ == "__main__":
from vstf.common.log import setup_logging
setup_logging(level=logging.DEBUG, log_file="/var/log/vstf/vstf-pktgen.log", clevel=logging.DEBUG)
unit_test()
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