def run(args):
flags = args.flags.split(',')
for f in flags:
logger.info("Measuring with {0} flag".format(f))
os.environ["CERE_BACKEND_FLAGS"] = f
cere_replay.run(args)
if "CERE_BACKEND_FLAGS" in os.environ:
del os.environ["CERE_BACKEND_FLAGS"]
return True
def run(args):
flags = args.flags.split(',')
for f in flags:
logger.info("Measuring with {0} flag".format(f))
os.environ["CERE_BACKEND_FLAGS"] = f
cere_replay.run(args)
if "CERE_BACKEND_FLAGS" in os.environ:
del os.environ["CERE_BACKEND_FLAGS"]
return True
def replay_invocations(self, force):
if not os.path.isfile("{0}/{1}.invocations".format(
var.CERE_TRACES_PATH, self.region)):
logger.error("No invocation file for region {0}".format(
self.region))
return False
err = False
clust = 0
with open("{0}/{1}.invocations".format(
var.CERE_TRACES_PATH, self.region)) as invocation_file:
for line in invocation_file:
self.force = False
res = True
clust = clust + 1
infos = line.strip().split()
self.invocation = infos[0]
self.invitro_callcount = 10
#Dump the required invocation
cere_capture.run(self)
#Replay it and compute error between invivo and invitro cycles for this invocation
self.force = force
if not cere_replay.run(self):
err = True
invitro_cycles = 0.
else:
try:
if not os.path.isfile("{0}/{1}_{2}.csv".format(
var.CERE_REPLAY_PATH, self.region,
self.invocation)):
shutil.move(
"{0}.csv".format(self.region),
"{0}/{1}_{2}.csv".format(
var.CERE_REPLAY_PATH, self.region,
self.invocation))
except IOError as err:
logger.error(str(err))
logger.error(
"No results file. Maybe replay failed for {0} invocation {1}"
.format(self.region, self.invocation))
err = True
invitro_cycles = 0.
else:
with open("{0}/{1}_{2}.csv".format(
var.CERE_REPLAY_PATH, self.region,
self.invocation)) as invitro:
reader = csv.DictReader(invitro)
for row in reader:
invitro_cycles = float(
row["CPU_CLK_UNHALTED_CORE"]) / float(
row["Call Count"])
matching_err = compute_error(invitro_cycles, float(infos[2]))
#Aggregate invocations cycles, needed to compute invitro measure for the codelet
self.invitro_cycles = self.invitro_cycles + invitro_cycles * float(
infos[1])
self.invocations_data.append([
infos[0], clust, infos[1], invitro_cycles, infos[2],
matching_err
])
return not err
def replay_invocations(self, force):
if not os.path.isfile("{0}/{1}.invocations".format(var.CERE_TRACES_PATH, self.region)):
logger.error("No invocation file for region {0}".format(self.region))
return False
err=False
clust=0
with open("{0}/{1}.invocations".format(var.CERE_TRACES_PATH, self.region)) as invocation_file:
for line in invocation_file:
self.force = False
res=True
clust = clust + 1
infos = line.strip().split()
self.invocation = infos[0]
self.invitro_callcount = 10
#Dump the required invocation
cere_capture.run(self)
#Replay it and compute error between invivo and invitro cycles for this invocation
self.force = force
if not cere_replay.run(self):
err=True
invitro_cycles = 0.
else:
try:
if not os.path.isfile("{0}/{1}_{2}.csv".format(var.CERE_REPLAY_PATH, self.region, self.invocation)) or self.force:
shutil.move("{0}.csv".format(self.region), "{0}/{1}_{2}.csv".format(var.CERE_REPLAY_PATH, self.region, self.invocation))
except IOError as err:
logger.error(str(err))
logger.error("No results file. Maybe replay failed for {0} invocation {1}".format(self.region, self.invocation))
err=True
invitro_cycles = 0.
else:
with open("{0}/{1}_{2}.csv".format(var.CERE_REPLAY_PATH, self.region, self.invocation)) as invitro:
reader = csv.DictReader(invitro)
for row in reader:
invitro_cycles = float(row["CPU_CLK_UNHALTED_CORE"]) / float(row["Call Count"])
matching_err = compute_error(invitro_cycles, float(infos[2]))
#Aggregate invocations cycles, needed to compute invitro measure for the codelet
self.invitro_cycles = self.invitro_cycles + invitro_cycles * float(infos[1])
self.invocations_data.append([infos[0], clust, infos[1], invitro_cycles, infos[2], matching_err])
return not err
def run_replay(flags, args, history):
best_id = -1
best_cycles = float("inf")
#Open result file
with open("{0}/{1}.csv".format(var.CERE_FLAGS_PATH, args.region), 'a') as region_file:
region_writer = csv.writer(region_file)
for line in flags:
#Replay if "id" not already measured
if line["id"] not in history:
logger.info("Running ID: {0}".format(line["id"]))
set_env(line)
#Set attributes for the replay pass.
args.static=False
args.force=True
args.invocation=None
args.noinstrumentation=False
args.norun=False
args.plugin_instr=var.RDTSC_WRAPPER
if cere_replay.run(args):
predicted_cycles = get_predicted_cycles(args.region)
region_writer.writerow([line["id"], line["mid_end"], line["back_end"], predicted_cycles])
region_file.flush()
else:
predicted_cycles = float("inf")
#Get previous measure for this sequence of flags
else:
predicted_cycles = float(history[line["id"]]["cycles"])
if predicted_cycles < best_cycles:
best_cycles = predicted_cycles
best_id = line["id"]
args.FLAGSFILE.seek(0)
flags.next()
return best_id, best_cycles
