1 """Memory watchdog: periodically read the memory usage of the main test process 2 and print it out, until terminated.""" 3 # stdin should refer to the process' /proc/<PID>/statm: we don't pass the 4 # process' PID to avoid a race condition in case of - unlikely - PID recycling. 5 # If the process crashes, reading from the /proc entry will fail with ESRCH. 6 7 8 import os 9 import sys 10 import time 11 12 13 try: 14 page_size = os.sysconf('SC_PAGESIZE') 15 except (ValueError, AttributeError): 16 try: 17 page_size = os.sysconf('SC_PAGE_SIZE') 18 except (ValueError, AttributeError): 19 page_size = 4096 20 21 while True: 22 sys.stdin.seek(0) 23 statm = sys.stdin.read() 24 data = int(statm.split()[5]) 25 sys.stdout.write(" ... process data size: {data:.1f}G\n" 26 .format(data=data * page_size / (1024 ** 3))) 27 sys.stdout.flush() 28 time.sleep(1) 29
