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query.py
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query.py
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#!/bin/python3
import argparse
import bson.raw_bson as raw_bson
from bsonjs import dumps
from generator.err import errors, error_strings
from generator.consts import *
from generator.generator import Probe
from probes import ProbeHit, ProbeHistory, TimeTable, USDTThread, USDTArg
from signal import signal, SIGINT
from threading import Event, Lock
from util import WorkerMaster, WorkerThread
####################################################################################
class QueryTimeTable(TimeTable):
def __init__(self, view):
TimeTable.__init__(self, view)
self.on_add = self._callback_gen(view)
self.successful = 0
self.kernel_faults = 0
self.key_errs = 0
self.bad_bson = 0
self.others = 0
if __name__ == "__main__":
self.lk = Lock()
def _callback_gen(self, view):
def process_callback(probe, hit):
if __name__ == "__main__":
self.lk.acquire()
print("----", probe, "----")
# check for errors:
errname = "bson_err"
if errname in hit.args:
err = hit.args[errname]
print("ERROR", error_strings[err])
if err == errors["KERNEL_FAULT"]:
self.kernel_faults = self.kernel_faults + 1
elif err == errors["KEY_ERROR"]:
self.key_errs = self.key_errs + 1
else:
self.others = self.others + 1
else:
ptr = hit.args["ptr"]
bson = hit.args["bson"]
sz = hit.args["bson_sz"]
print("BSON REC'VED: [{}] [{}/{} bytes]".format(ptr, len(bson), sz))
try:
rbson = raw_bson.RawBSONDocument(bson)
print(dumps(rbson.raw))
self.successful = self.successful + 1
except Exception as e:
out = ""
for b in bson:
out += str(hex(b))
print(out)
print(e)
self.bad_bson = self.bad_bson + 1
self.lk.release()
return process_callback
def dump_stats(self):
total = self.others + self.key_errs + self.successful + self.kernel_faults + self.bad_bson
if total == 0:
return
print("TOTAL:", total)
print("successes:", self.successful, "[{}%]".format(round(self.successful*100/total, 3)))
print("kernel faults:", self.kernel_faults, "[{}%]".format(round(self.kernel_faults*100/total, 3)))
print("key errs:", self.key_errs, "[{}%]".format(round(self.key_errs*100/total, 3)))
print("others:", self.others, "[{}%]".format(round(self.others*100/total, 3)))
print("bad bsons:", self.bad_bson, "[{}%]".format(round(self.bad_bson*100/total, 3)))
####################################################################################
def sigint_handler_gen(mr, tt):
def handler(signal, frame):
mr.kill_all()
print("-----------------------------------")
print(str(tt))
tt.dump_stats()
exit(0)
return handler
def ptr_and_bson_probe(name, samples, chunk_sz, map_sz):
return {PROBE_NAME_KEY: name,
SAMPLES_PROPORTION_KEY: samples,
MAX_STR_SZ_KEY: chunk_sz,
MAX_MAP_SZ_KEY: map_sz,
PROBE_ARGS_KEY: [
{ARG_TYPE_KEY: POINTER_TYPE, ARG_NAME_KEY: "ptr"},
{ARG_TYPE_KEY: LONG_STRING_TYPE, ARG_NAME_KEY: "bson"}
]}
# Main #
if __name__ == '__main__':
parser = argparse.ArgumentParser(description="Gather data from QueryRequests.")
parser.add_argument('pid',
metavar='pid',
type=int,
nargs=1,
help='pid of process emitting probes')
parser.add_argument('-s', '--sample',
metavar='sample',
type=float,
nargs='?',
default=1,
help='number of queries to sample')
parser.add_argument('-c', '--chunk',
metavar='chunk',
type=int,
nargs='?',
default=MAX_STR_SZ,
help='maximum chunk size')
parser.add_argument('-m', '--map',
metavar='map',
type=int,
nargs='?',
default=MAX_MAP_SZ,
help='maximum map size')
args = parser.parse_args()
print(args)
mr = None
time_table = QueryTimeTable(None)
workers = []
for probe_name in ["queryRequestFilter", "queryRequestProj", "queryRequestSort", "queryRequestHint",
"queryRequestReadConcern", "queryRequestCollation", "queryRequestUnwrappedReadPref"]:
worker = USDTThread(args.pid[0], [ptr_and_bson_probe(probe_name, args.sample, args.chunk, args.map)], time_table)
workers.append(worker)
mr = WorkerMaster(workers)
mr.start_all()
signal(SIGINT, sigint_handler_gen(mr, time_table))
Event().wait() # wait for keyboard interrupt forever