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#!/usr/bin/python
##
## Copyright (c) 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
import requests
from rapid_log import RapidLog
from rapid_test import RapidTest
class IrqTest(RapidTest):
"""
Class to manage the irq testing
"""
def __init__(self, test_param, runtime, testname, environment_file,
machines):
super().__init__(test_param, runtime, testname, environment_file)
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()
max_loop_duration = 0
machine_details = {}
for machine in self.machines:
buckets=machine.socket.show_irq_buckets(1)
if max_loop_duration == 0:
# First time we go through the loop, we need to initialize
# result_details
result_details = {'test': self.test['testname'],
'environment_file': self.test['environment_file'],
'buckets': buckets}
print('Measurement ongoing ... ',end='\r')
machine.start() # PROX cores will be started within 0 to 1 seconds
# That is why we sleep a bit over 1 second to make sure all cores
# are started
time.sleep(1.2)
old_irq = [[0 for x in range(len(buckets))] for y in range(len(machine.get_cores()))]
irq = [[0 for x in range(len(buckets))] for y in range(len(machine.get_cores()))]
column_names = []
for bucket in buckets:
column_names.append('<{}'.format(bucket))
column_names[-1] = '>{}'.format(buckets[-2])
for j,bucket in enumerate(buckets):
for i,irqcore in enumerate(machine.get_cores()):
old_irq[i][j] = machine.socket.irq_stats(irqcore,j)
# Measurements in the loop above, are updated by PROX every second
# This means that taking the same measurement 0.5 second later
# might result in the same data or data from the next 1s window
time.sleep(float(self.test['runtime']))
row_names = []
for i,irqcore in enumerate(machine.get_cores()):
row_names.append(irqcore)
for j,bucket in enumerate(buckets):
diff = machine.socket.irq_stats(irqcore,j) - old_irq[i][j]
if diff == 0:
irq[i][j] = '0'
else:
irq[i][j] = str(round(old_div(diff,
float(self.test['runtime'])), 2))
if max_loop_duration < int(bucket):
max_loop_duration = int(bucket)
# Measurements in the loop above, are updated by PROX every second
# This means that taking the same measurement 0.5 second later
# might result in the same data or data from the next 1s window
# Conclusion: we don't know the exact window size.
# Real measurement windows might be wrong by 1 second
# This could be fixed in this script by checking this data every
# 0.5 seconds Not implemented since we can also run this test for
# a longer time and decrease the error. The absolute number of
# interrupts is not so important.
machine.stop()
core_details = {}
RapidLog.info('Results for PROX instance %s'%machine.name)
RapidLog.info('{:>12}'.format('bucket us') +
''.join(['{:>12}'.format(item) for item in column_names]))
for j, row in enumerate(irq):
RapidLog.info('Core {:>7}'.format(row_names[j]) +
''.join(['{:>12}'.format(item) for item in row]))
core_details['Core {}'.format(row_names[j])] = row
machine_details[machine.name] = core_details
result_details['machine_data'] = machine_details
result_details = self.post_data('rapid_irqtest', result_details)
return (500000 - max_loop_duration, result_details)
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