1 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved. 2 # Use of this source code is governed by a BSD-style license that can be 3 # found in the LICENSE file. 4 5 import logging, re, struct, sys, time 6 7 from autotest_lib.client.bin import test, utils 8 from autotest_lib.client.common_lib import error 9 10 def memory_channel_args_snb_bdw(channel_modules): 11 """Add arguments for memory testing. 12 Works on sandybridge, ivybridge, broadwell. Maybe others? 13 14 @param channel_modules: channel names. 15 """ 16 17 with open('/proc/bus/pci/00/00.0', 'r', 0) as fd: 18 fd.seek(0x48) 19 mchbar = struct.unpack('=I', fd.read(4))[0] 20 if not mchbar & 1: 21 raise error.TestError('Host Memory Mapped Register Range not enabled.') 22 mchbar &= ~1 23 24 with open('/dev/mem', 'r', 0) as fd: 25 fd.seek(mchbar + 0x5000) 26 mad_chnl = struct.unpack('=I', fd.read(4))[0] 27 fd.seek(mchbar + 0x5024) 28 channel_hash = struct.unpack('=I', fd.read(4))[0] 29 30 if (mad_chnl >> 4) & 3 != 2: 31 raise error.TestError('This test does not support triple-channel mode.') 32 if mad_chnl & 3 == 0 and (mad_chnl >> 2) & 3 == 1: 33 channel_order = [0, 1] 34 elif mad_chnl & 3 == 1 and (mad_chnl >> 2) & 3 == 0: 35 logging.warning('Non-default memory channel configuration... please ' 36 'double-check that this is correct and intended.') 37 channel_order = [1, 0] 38 else: 39 raise error.TestError('Invalid channel configuration: %x' % mad_chnl) 40 41 if not channel_hash & (1 << 23): 42 logging.warning('Memory channel_hash deactivated... going with cache-line ' 43 'sized ping-pong as a wild guess.') 44 channel_hash = 1 45 channel_hash = (channel_hash & 0x3FFF) << 6 46 47 return (' --memory_channel %s --memory_channel %s --channel_hash 0x%x' 48 ' --channel_width 64' % ( 49 ','.join(channel_modules[channel_order[0]]), 50 ','.join(channel_modules[channel_order[1]]), 51 channel_hash)) 52 53 54 class hardware_SAT(test.test): 55 """Run SAT.""" 56 57 version = 1 58 59 60 def run_once(self, seconds=60, free_memory_fraction=0.95, wait_secs=0, 61 disk_thread=True): 62 ''' 63 Args: 64 free_memory_fraction: Fraction of free memory (as determined by 65 utils.freememtotal()) to use. 66 wait_secs: time to wait in seconds before executing stressapptest. 67 disk_thread: also stress disk using -f argument of stressapptest. 68 ''' 69 assert free_memory_fraction > 0 70 assert free_memory_fraction < 1 71 72 # Wait other parallel tests memory usage to settle to a stable value, so 73 # stressapptest will not claim too much memory. 74 if wait_secs: 75 time.sleep(wait_secs) 76 77 # Allow shmem access to all of memory. This is used for 32 bit 78 # access to > 1.4G. Virtual address space limitation prevents 79 # directly mapping the memory. 80 utils.run('mount -o remount,size=100% /dev/shm') 81 cpus = max(utils.count_cpus(), 1) 82 mbytes = max(int(utils.freememtotal() * free_memory_fraction / 1024), 83 512) 84 # Even though shared memory allows us to go past the 1.4G 85 # limit, ftruncate still limits us to 2G max on 32 bit systems. 86 if sys.maxsize < 2**32 and mbytes > 2047: 87 mbytes = 2047 88 # SAT should use as much memory as possible, while still 89 # avoiding OOMs and allowing the kernel to run, so that 90 # the maximum amoun tof memory can be tested. 91 args = ' -M %d' % mbytes # megabytes to test 92 # The number of seconds under test can be chosen to fit into 93 # manufacturing or test flow. 60 seconds gives several 94 # passes and several patterns over each memory location 95 # and should catch clearly fautly memeory. 4 hours 96 # is an effective runin test, to catch lower frequency errors. 97 args += ' -s %d' % seconds # seconds to run 98 # One memory copy thread per CPU should keep the memory bus 99 # as saturated as possible, while keeping each CPU busy as well. 100 args += ' -m %d' % cpus # memory copy threads. 101 # SSE copy and checksum increases the rate at which the CPUs 102 # can drive memory, as well as stressing the CPU. 103 args += ' -W' # Use SSE optimizatin in memory threads. 104 # File IO threads allow stressful transactions over the 105 # south bridge and SATA, as well as potentially finding SSD 106 # or disk cache problems. Two threads ensure multiple 107 # outstanding transactions to the disk, if supported. 108 if disk_thread: 109 args += ' -f sat.diskthread.a' # disk thread 110 args += ' -f sat.diskthread.b' 111 112 if utils.get_board() == 'link': 113 args += memory_channel_args_snb_bdw([ 114 ['U1', 'U2', 'U3', 'U4'], 115 ['U6', 'U5', 'U7', 'U8']]) # yes, U6 is actually before U5 116 117 if utils.get_board() == 'samus': 118 args += memory_channel_args_snb_bdw([ 119 ['U11', 'U12'], 120 ['U13', 'U14']]) 121 122 # 'stressapptest' is provided by dev-util/stressapptest, pre-installed 123 # in test images. 124 sat = utils.run('stressapptest' + args) 125 logging.debug(sat.stdout) 126 if not re.search('Status: PASS', sat.stdout): 127 raise error.TestFail(sat.stdout) 128
