OVS DPDK helper utils

cores2mask.py

#!/usr/bin/python

import sys

try:
    cpu_nums = [int(n) for n in list(sys.argv[1].split(','))]
except:
    print "Print bitmask in bin and  hex given a list of zero-indexed numbers"
    print "Usage: %s cpu-list" % sys.argv[0]
    print "e.g. %s 1,13" % sys.argv[0]
    print "Bitmask 10000000000010 in hex is 0x2002"
    sys.exit(1)

mask = 0
for n in cpu_nums:
    m = 1
    m = m << n
    mask = mask | m

print "Bitmask {:b} in hex is 0x{:x}".format(mask, mask)

mask2cores.py

#!/usr/bin/python

import sys

try:
    n = int(sys.argv[1], 16)
except:
    print "List CPU cores from hex bitmask"
    print "Usage: %s bitmask_in_hex" % sys.argv[0]
    print "e.g. %s 0x2002" % sys.argv[0]
    print "0x2002 is 10000000000010"
    print "0 indexed cores: [1, 13]"
    sys.exit(1)

print "0x{:x} is {:b}".format(n, n)

i = 0
psr_nums = []
while True:
    if n == 0:
        break;
    if (n & 1) == 1:
        psr_nums.append(i)
    n = n >> 1
    i += 1

print "0 indexed cores: %s" % psr_nums