#!/usr/bin/python
import os, sys, time
PAGESIZE=os.sysconf("SC_PAGE_SIZE")/1024 #KiB

#stat = {Shared,Rss}
#file = {smaps,statm}
def getMemStat(pid,stat,file):
    if file=="smaps":
        shared_lines=[line
                      for line in open("/proc/"+str(pid)+"/smaps").readlines()
                      if line.find(stat)!=-1]
        return sum([int(line.split()[1]) for line in shared_lines])
    else:
        if stat == "Shared": stat_index=2
        elif stat == "Rss": stat_index=1
        return int(open("/proc/"+str(pid)+"/statm").readline().split()[stat_index])*PAGESIZE

a="\x00"*(32*1024*1024) #alloc 32MiB
pid=os.fork()
if(not pid):
     time.sleep(1)
     sys.exit()

for file in ["statm", "smaps"]:
    rss=float(getMemStat(pid,"Rss",file))
    shr=float(getMemStat(pid,"Shared",file))
    print "/proc/%d/%s reports %.1f%% shared" % (pid,file,((shr/rss)*100))

os.wait()