e820guess

#! /usr/bin/python
# e820guess - Parses an sosreports e820 memory map fields into a human-readable output
# Written by Kyle Walker - kwalker@redhat.com
import sys, os

def loadMap(inputFile):
	readData = open(inputFile)
	e820 = []; e820Final = 0; nomore = 0
	for line in readData:
		if nomore == 0 and ("e820" in line and "usable" in line):
			e820.append(line)
		elif "e820" not in line and len(e820) > 0:
			nomore = 1
	readData.close()

	for x in range(0,len(e820)):
		e820[x] = e820[x].rstrip()
		e820[x] = filter(None, e820[x].split(" "))
		e820[x] = e820[x][6:9]
		e820[x].remove("-")
		
	for x in range(0,len(e820)):
		e820[x] = (int(e820[x][1],16) - int(e820[x][0],16))
	for x in range(0,len(e820)):
		e820Final+=e820[x]
	print "Roughly %dGb of RAM" % (e820Final/1024/1024/1024)


if len(sys.argv) > 0 and os.path.exists(sys.argv[1]):
	loadMap(sys.argv[1])