mirror of https://github.com/scrapy/scrapy.git
26 lines
826 B
Python
26 lines
826 B
Python
import os
|
|
|
|
_vmvalue_scale = {'kB': 1024, 'mB': 1024*1024, 'KB': 1024, 'MB': 1024*1024}
|
|
|
|
def get_vmvalue_from_procfs(vmkey='VmSize', pid=None):
|
|
"""Return virtual memory value (in bytes) for the given pid using the /proc
|
|
filesystem. If pid is not given, it default to the current process pid.
|
|
Available keys are: VmSize, VmRSS (default), VmStk
|
|
"""
|
|
if pid is None:
|
|
pid = os.getpid()
|
|
try:
|
|
t = open('/proc/%d/status' % pid)
|
|
except IOError:
|
|
raise RuntimeError("/proc filesystem not supported")
|
|
v = t.read()
|
|
t.close()
|
|
# get vmkey line e.g. 'VmRSS: 9999 kB\n ...'
|
|
i = v.index(vmkey + ':')
|
|
v = v[i:].split(None, 3) # whitespace
|
|
if len(v) < 3:
|
|
return 0 # invalid format?
|
|
# convert Vm value to bytes
|
|
return int(v[1]) * _vmvalue_scale[v[2]]
|
|
|