/
proc_taststats.py
252 lines (196 loc) · 6.8 KB
/
proc_taststats.py
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#!/usr/bin/python
#
###
#
import struct, socket
import errno
import os
import array
# Definde the constants for NetLink module
ACK_REQUEST = (4 | 1)
NETLINK_ROUTE = 0
NETLINK_GENERIC = 16
NLM_F_REQUEST = 1
NLMSG_MIN_TYPE = 0x10
GENL_ID_CTRL = NLMSG_MIN_TYPE
NLMSG_NOOP = 0x1 #/* Nothing. */
NLMSG_ERROR = 0x2 #/* Error */
NLMSG_DONE = 0x3 #/* End of a dump */
NLMSG_OVERRUN = 0x4 #/* Data lost */
CTRL_CMD_UNSPEC = 0
CTRL_CMD_NEWFAMILY = 1
CTRL_CMD_DELFAMILY = 2
CTRL_CMD_GETFAMILY = 3
CTRL_CMD_NEWOPS = 4
CTRL_CMD_DELOPS = 5
CTRL_CMD_GETOPS = 6
CTRL_ATTR_UNSPEC = 0
CTRL_ATTR_FAMILY_ID = 1
CTRL_ATTR_FAMILY_NAME = 2
CTRL_ATTR_VERSION = 3
CTRL_ATTR_HDRSIZE = 4
CTRL_ATTR_MAXATTR = 5
CTRL_ATTR_OPS = 6
GE_Attr_Fmt=[
9,# 0 CTRL_ATTR_UNSPEC
'''=H''',# 1 U16(skb, CTRL_ATTR_FAMILY_ID
0,# 2 STRING(skb, CTRL_ATTR_FAMILY_NAME
'''=I''',# 3 U32(skb, CTRL_ATTR_VERSION
'''=I''',# 4 U32(skb, CTRL_ATTR_HDRSIZE
'''=I''',# 5 U32(skb, CTRL_ATTR_MAXATTR
'''=I''',# 6 U32(skb, CTRL_ATTR_OP_ID
'''=I''',# 7 U32(skb, CTRL_ATTR_OP_FLAGS
'''=I''',# 8 U32(skb, CTRL_ATTR_MCAST_GRP_ID
9 # 9 STRING(skb, CTRL_ATTR_MCAST_GRP_NAME
]
GE_Attr=[
0,#0,
0,#1,
0,#2,
0,#3,
0,#4,
0,#5,
0,#6,
0,#7,
0,#8,
0#9
]
TASKSTATS_CMD_ATTR_PID = 1
TASKSTATS_CMD_ATTR_TGID =2
TASKSTATS_TYPE_PID = 1 # /* Process id */
TASKSTATS_TYPE_TGID = 2 # /* Thread group id */
TASKSTATS_TYPE_STATS = 3 # /* taskstats structure */
TASKSTATS_TYPE_AGGR_PID = 4 # /* contains pid + stats */
TASKSTATS_TYPE_AGGR_TGID =5 # /* contains tgid + stats */
TASKSTATS_CMD_GET = 1 # /* user->kernel request/get-response */
TASKSTATS_CMD_NEW = 2 # /* kernel->user event */
TASKSTATS_fields = [
'version', 'ac_exitcode',
'ac_flag', 'ac_nice',
'cpu_count', 'cpu_delay_total',
'blkio_count', 'blkio_delay_total',
'swapin_count', 'swapin_delay_total',
'cpu_run_real_total', 'cpu_run_virtual_total',
'ac_comm',
'ac_sched',
'ac_uid', 'ac_gid', 'ac_pid', 'ac_ppid',
'ac_btime', 'ac_etime', 'ac_utime', 'ac_stime',
'ac_minflt', 'ac_majflt',
'coremem',
'virtmem',
'hiwater_rss', 'hiwater_vm',
'read_char', 'write_char', 'read_syscalls', 'write_syscalls',
'read_bytes', 'write_bytes', 'cancelled_write_bytes',
'nvcsw', 'nivcsw',
'utimescaled', 'stimescaled', 'cpu_scaled_run_real_total',
'freepages_count', 'freepages_delay_total'
]
TASKSTATS_fmt = 'HIBBQQQQQQQQ32sIxxxIIIIIQQQQQQQQQQQQQQQQQQQQQQQ'
debug = 0
class Proc_TaskStats(object):
"""
Module for processing CPU and disk IO information using TaskStats.
"""
def __init__(self, process):
self.name = "Proc_TaskStats"
self.__pid__ = process
self.socket = socket.socket(socket.AF_NETLINK, socket.SOCK_RAW, NETLINK_GENERIC)
self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF, 65536)
self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 65536)
self.socket.bind((0,0))
self.pid, self.groups = self.socket.getsockname()
if debug > 0: print "self.pid:",self.pid
self.type = GENL_ID_CTRL
self.flags = NLM_F_REQUEST
self.proc_gentlink()
if debug > 0: print "Family ID: ", GE_Attr[CTRL_ATTR_FAMILY_ID]
self.proc_taskstats()
self.socket.close()
def proc_taskstats(self):
#get TASKSTATS info
msg_ts=array.array(str('B'))
msg_ts.fromstring(struct.pack("BBxx", TASKSTATS_CMD_GET, 0))
#May need to validate the pid here
if debug > 0: print "process id: ",self.__pid__
cmd=struct.pack('=I', int(self.__pid__))
mlen=len(cmd) + 4
msg_ts.fromstring(struct.pack("HH", mlen, TASKSTATS_CMD_ATTR_PID))
msg_ts.fromstring(cmd)
msg_ts.fromstring('\0' * ((4 - (len(cmd) % 4)) & 0x3))
nlmhdr_msg=array.array(str('B'),struct.pack(str('=IHHII'), len(msg_ts) + 16, GE_Attr[CTRL_ATTR_FAMILY_ID], ACK_REQUEST, 1, self.pid))
nlmhdr_msg.extend(msg_ts)
self.socket.send(nlmhdr_msg)
data = self.socket.recv(65536)
data=self.unpack_nlhdr(data)
data=self.unpack_genlhdr(data)
self.unpack_taskstats(data)
def unpack_taskstats(self,data):
#get TASKSTATS info
# may need to check the lens and types above. Not now.
attrs = dict(zip(TASKSTATS_fields, struct.unpack(TASKSTATS_fmt, data[16:])))
attrs['ac_comm'] = attrs['ac_comm'].rstrip('\0')
print attrs
def proc_gentlink(self):
#get GELINK Header info
cmd='TASKSTATS\0'
mlen=len(cmd) + 4
msg_ts=array.array(str('B'))
msg_ts.fromstring(struct.pack("BBxx", CTRL_CMD_GETFAMILY, 0))
msg_ts.fromstring(struct.pack("HH", mlen, CTRL_ATTR_FAMILY_NAME))
msg_ts.fromstring(cmd)
tmp=((4 - (len(msg_ts) % 4)) & 0x3)
msg_ts.fromstring('\0' * ((4 - (len(cmd) % 4)) & 0x3))
nlmhdr_msg=array.array(str('B'),struct.pack(str('=IHHII'), len(msg_ts) + 16, NETLINK_GENERIC, NLM_F_REQUEST, 0, 0))
nlmhdr_msg.extend(msg_ts)
self.socket.send(nlmhdr_msg)
data = self.socket.recv(65536)#(16384)
data=self.unpack_nlhdr(data)
data=self.unpack_genlhdr(data)
while len(data) > 0:
data=self.unpack_attr_hdr(data)
#
if self.flags & 0x2 == 0:
if debug>0: print "End of receiving message!"
return
def unpack_genlhdr(self,data):
cmd, version = struct.unpack(str('=BBxx'), data[:4])
if debug > 0: print "genlhdr: cmd:",cmd,"version: ",version
return data[4:]
def unpack_nlhdr(self,data):
try:
(size, type, flags, seq, pid) = struct.unpack(str('=IHHII'), data[:16])
self.flags=flags
if type == NLMSG_ERROR:
error = -int(struct.unpack(str('=i'), data[16:20])[0])
#print "Error: ", errno.errorcode[error]," : ", os.strerror(error)
raise RuntimeError(errno.errorcode[error]+" : "+os.strerror(error))
return data[16:size]
except Exception as e:
raise
def unpack_attr_hdr(self,data):
len, typ = struct.unpack(str('=HH'), data[:4])
len = len & 0x7fff
#
if GE_Attr_Fmt[typ] ==0:
if debug>0: print "name processing: "+data[4:len-1]
GE_Attr[typ]=data[4:len-1]
elif GE_Attr_Fmt[typ] ==9:
pass
#print "Not supported yet!"
elif typ >5:
pass
#print "OPS attr, ignore..."
else:
GE_Attr[typ]=struct.unpack(GE_Attr_Fmt[typ], data[4:len])[0]
#
#
return data[((((len +3 ))) & ~0x3):]
def __del__(self):
pass
if __name__ == '__main__':
import sys
process = -1
if len(sys.argv) > 1 and sys.argv[1] > 0:
process = sys.argv[1]
print "process: ",process
exp = Proc_TaskStats(process)