blob: 0f832c9b07777f008b51abcaae5dcf8c8ed0b981 [file] [log] [blame]
# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# This is a hardware test for interrupts. The test reloads kernel module
# to check if the hardware issues interrupts back to the host.
import re
import time
import logging
from autotest_lib.client.bin import test, utils
from autotest_lib.client.common_lib import error
class ProcInterrupts(object):
Parse /proc/interrupts and provide interfaces to access number of
interrupts per module or per interrupt number/name
def __init__(self):
self._int_count = {}
with open(self.INTERRUPT_FILE) as interrupts_file:
lines = interrupts_file.readlines()
# First line indicates CPUs in system
num_cpus = len(lines.pop(0).split())
for line in lines:
fields = line.split()
count = sum(map(int, fields[1:1 + num_cpus]))
interrupt = fields[0].strip().split(':')[0]
if interrupt.isdigit():
self._int_count[fields[-1]] = count
logging.debug('int[%s] = %d', fields[-1], count)
interrupt = int(interrupt)
self._int_count[interrupt] = count
logging.debug('int[%s] = %d', interrupt, count)
def get(self, interrupt):
if interrupt in self._int_count:
logging.debug('got int[%s] = %d', interrupt,
return self._int_count[interrupt]
return 0
class hardware_Interrupt(test.test):
version = 1
def run_once(self,
proc_int = ProcInterrupts()
count = proc_int.get(interrupt)
if reload_module:
utils.system('rmmod %s' % reload_module)
utils.system('modprobe %s' % reload_module)
# Wait for procfs update
proc_int = ProcInterrupts()
count = proc_int.get(interrupt) - count
if count < min_count:
raise error.TestError('Interrupt test failed: int[%s] = %d < '
'min_count %d' % (interrupt, count,