from threading import Thread
import os

def getMemory():
    # returns memory utilization in MB
    # works on Linux only
    try:    f = open("/proc/%s/status" % (os.getpid(),), "r")
    except:
        # non-Linux
        return None, None
    vmsize = None
    vmrss = None
    for l in f.readlines():
        l = l.strip()
        if l.startswith("VmSize:"):
            vmsize = int(l.split()[1])
        elif l.startswith("VmRSS:"):
            vmrss = int(l.split()[1])
    return float(vmsize)/1024.0, float(vmrss)/1024.0


class T(Thread):

    def run(self):
        return


vm0, rss0 = getMemory()

for i in range(1000000):
    t = T()
    t.start()
    if i and i % 10000 == 0:
        vm1, rss1 = getMemory()
        delta = rss1-rss0
        print(vm1, rss1, delta/10000.0*1024, "KB/thread")
        rss0 = rss1