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#!/usr/bin/python
##
## Copyright (c) 2010-2020 Intel Corporation
##
## Licensed under the Apache License, Version 2.0 (the "License");
## you may not use this file except in compliance with the License.
## You may obtain a copy of the License at
##
##
## http://www.apache.org/licenses/LICENSE-2.0
##
## Unless required by applicable law or agreed to in writing, software
## distributed under the License is distributed on an "AS IS" BASIS,
## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
## See the License for the specific language governing permissions and
## limitations under the License.
##
from past.utils import old_div
import sys
import time
from rapid_log import RapidLog
from rapid_test import RapidTest
class IrqTest(RapidTest):
"""
Class to manage the irq testing
"""
def __init__(self, runtime, machines):
self.runtime = runtime
self.machines = machines
def run(self):
RapidLog.info("+----------------------------------------------------------------------------------------------------------------------------")
RapidLog.info("| Measuring time probably spent dealing with an interrupt. Interrupting DPDK cores for more than 50us might be problematic ")
RapidLog.info("| and result in packet loss. The first row shows the interrupted time buckets: first number is the bucket between 0us and ")
RapidLog.info("| that number expressed in us and so on. The numbers in the other rows show how many times per second, the program was ")
RapidLog.info("| interrupted for a time as specified by its bucket. '0' is printed when there are no interrupts in this bucket throughout ")
RapidLog.info("| the duration of the test. 0.00 means there were interrupts in this bucket but very few. Due to rounding this shows as 0.00 ")
RapidLog.info("+----------------------------------------------------------------------------------------------------------------------------")
sys.stdout.flush()
for machine in self.machines:
buckets=machine.socket.show_irq_buckets(1)
print('Measurement ongoing ... ',end='\r')
machine.stop()
old_irq = [[0 for x in range(len(buckets)+1)] for y in range(len(machine.get_cores())+1)]
irq = [[0 for x in range(len(buckets)+1)] for y in range(len(machine.get_cores())+1)]
irq[0][0] = 'bucket us'
for j,bucket in enumerate(buckets,start=1):
irq[0][j] = '<'+ bucket
irq[0][-1] = '>'+ buckets [-2]
machine.start()
time.sleep(2)
for j,bucket in enumerate(buckets,start=1):
for i,irqcore in enumerate(machine.get_cores(),start=1):
old_irq[i][j] = machine.socket.irq_stats(irqcore,j-1)
time.sleep(float(self.runtime))
machine.stop()
for i,irqcore in enumerate(machine.get_cores(),start=1):
irq[i][0]='core %s '%irqcore
for j,bucket in enumerate(buckets,start=1):
diff = machine.socket.irq_stats(irqcore,j-1) - old_irq[i][j]
if diff == 0:
irq[i][j] = '0'
else:
irq[i][j] = str(round(old_div(diff,float(self.runtime)), 2))
RapidLog.info('Results for PROX instance %s'%machine.name)
for row in irq:
RapidLog.info(''.join(['{:>12}'.format(item) for item in row]))
return (True)
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