/
_damon_result.py
265 lines (218 loc) · 8.65 KB
/
_damon_result.py
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#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
import struct
import subprocess
class DAMONRegion:
start = None
end = None
nr_accesses = None
def __init__(self, start, end, nr_accesses):
self.start = start
self.end = end
self.nr_accesses = nr_accesses
class DAMONSnapshot:
start_time = None
end_time = None
target_id = None
regions = None
def __init__(self, start_time, end_time, target_id):
self.start_time = start_time
self.end_time = end_time
self.target_id = target_id
self.regions = []
class DAMONResult:
start_time = None
end_time = None
nr_snapshots = None
target_snapshots = None # {target_id: [snapshot]}
def __init__(self):
self.target_snapshots = {}
def record_to_damon_result(file_path, f, fmt_version, max_secs):
result = None
parse_start_time = None
if f == None:
f = open(file_path, 'rb')
# read record format version
mark = f.read(16)
if mark == b'damon_recfmt_ver':
fmt_version = struct.unpack('i', f.read(4))[0]
else:
fmt_version = 0
f.seek(0)
elif not fmt_version:
print('fmt_version is not given')
exit(1)
result = DAMONResult()
while True:
timebin = f.read(16)
if len(timebin) != 16:
if max_secs == None:
f.close()
break
sec = struct.unpack('l', timebin[0:8])[0]
nsec = struct.unpack('l', timebin[8:16])[0]
end_time = sec * 1000000000 + nsec
if not parse_start_time:
parse_start_time = end_time
elif max_secs != None and (
end_time - parse_start_time > max_secs * 1000000000):
f.seek(-16, 1)
break
nr_tasks = struct.unpack('I', f.read(4))[0]
for t in range(nr_tasks):
if fmt_version == 1:
target_id = struct.unpack('i', f.read(4))[0]
else:
target_id = struct.unpack('L', f.read(8))[0]
if not target_id in result.target_snapshots:
result.target_snapshots[target_id] = []
target_snapshots = result.target_snapshots[target_id]
if len(target_snapshots) == 0:
start_time = None
else:
start_time = target_snapshots[-1].end_time
snapshot = DAMONSnapshot(start_time, end_time, target_id)
nr_regions = struct.unpack('I', f.read(4))[0]
for r in range(nr_regions):
start_addr = struct.unpack('L', f.read(8))[0]
end_addr = struct.unpack('L', f.read(8))[0]
nr_accesses = struct.unpack('I', f.read(4))[0]
region = DAMONRegion(start_addr, end_addr, nr_accesses)
snapshot.regions.append(region)
target_snapshots.append(snapshot)
return result, f, fmt_version
def perf_script_to_damon_result(file_path, f, max_secs):
result = None
nr_read_regions = 0
parse_start_time = None
if not f:
f = open(file_path, 'r')
for line in f:
line = line.strip()
'''
example line is as below:
kdamond.0 4452 [000] 82877.315633: damon:damon_aggregated: \
target_id=18446623435582458880 nr_regions=17 \
140731667070976-140731668037632: 0
'''
fields = line.strip().split()
if len(fields) != 9:
continue
if fields[4] != 'damon:damon_aggregated:':
continue
end_time = int(float(fields[3][:-1]) * 1000000000)
if not result:
result = DAMONResult()
if parse_start_time == None:
parse_start_time = end_time
elif max_secs != None and (
end_time - parse_start_time > max_secs * 1000000000):
# reverse seek of text file is not supported, we simply remove
# over-read line.
break
target_id = int(fields[5].split('=')[1])
if not target_id in result.target_snapshots:
result.target_snapshots[target_id] = []
target_snapshots = result.target_snapshots[target_id]
if len(target_snapshots) == 0:
start_time = None
else:
start_time = target_snapshots[-1].end_time
nr_regions = int(fields[6].split('=')[1])
addrs = [int(x) for x in fields[7][:-1].split('-')]
nr_accesses = int(fields[8])
if nr_read_regions == 0:
snapshot = DAMONSnapshot(start_time, end_time, target_id)
target_snapshots.append(snapshot)
snapshot = target_snapshots[-1]
snapshot.regions.append(DAMONRegion(addrs[0], addrs[1], nr_accesses))
nr_read_regions += 1
if nr_read_regions == nr_regions:
nr_read_regions = 0
if max_secs == None:
f.close()
return result, f
def parse_damon_result_for(result_file, file_type, f, fmt_version, max_secs):
if not file_type:
file_type = 'record'
output = subprocess.check_output('file -b \'%s\'' % result_file,
shell=True, executable='/bin/bash').decode().strip()
if output == 'ASCII text':
file_type = 'perf_script'
if file_type == 'record':
result, f, fmt_version = record_to_damon_result(result_file,
f, fmt_version, max_secs)
elif file_type == 'perf_script':
result, f = perf_script_to_damon_result(result_file, f, max_secs)
fmt_version = None
else:
print('unknown result file type: %s (%s)' % (file_type, result_file))
return None
for snapshots in result.target_snapshots.values():
if len(snapshots) < 2:
break
if not result.start_time:
end_time = snapshots[-1].end_time
start_time = snapshots[0].end_time
nr_snapshots = len(snapshots) - 1
snapshot_time = float(end_time - start_time) / nr_snapshots
result.start_time = start_time - snapshot_time
result.end_time = end_time
result.nr_snapshots = nr_snapshots + 1
snapshots[0].start_time = snapshots[0].end_time - snapshot_time
return result, f, fmt_version
def parse_damon_result(result_file, file_type):
result, f, fmt_version = parse_damon_result_for(result_file, file_type,
None, None, None)
f.close()
return result
def write_damon_record(result, file_path, format_version):
with open(file_path, 'wb') as f:
f.write(b'damon_recfmt_ver')
f.write(struct.pack('i', format_version))
for snapshot_idx in range(result.nr_snapshots):
for tid in result.target_snapshots:
snapshot = result.target_snapshots[tid][snapshot_idx]
f.write(struct.pack('l', snapshot.end_time // 1000000000))
f.write(struct.pack('l', snapshot.end_time % 1000000000))
f.write(struct.pack('I', 1))
if format_version == 1:
f.write(struct.pack('i', snapshot.target_id))
else:
f.write(struct.pack('L', snapshot.target_id))
f.write(struct.pack('I', len(snapshot.regions)))
for region in snapshot.regions:
f.write(struct.pack('L', region.start))
f.write(struct.pack('L', region.end))
f.write(struct.pack('I', region.nr_accesses))
def regions_intersect(r1, r2):
return not (r1.end <= r2.start or r2.end <= r1.start)
def add_region(regions, region, nr_acc_to_add):
for r in regions:
if regions_intersect(r, region):
if not r in nr_acc_to_add:
nr_acc_to_add[r] = 0
nr_acc_to_add[r] = max(nr_acc_to_add[r], region.nr_accesses)
new_regions = []
if region.start < r.start:
new_regions.append(DAMONRegion(
region.start, r.start, region.nr_accesses))
if r.end < region.end:
new_regions.append(DAMONRegion(
r.end, region.end, region.nr_accesses))
for new_r in new_regions:
add_region(regions, new_r, nr_acc_to_add)
return
regions.append(region)
def aggregate_snapshots(snapshots):
new_regions = []
for snapshot in snapshots:
nr_acc_to_add = {}
for region in snapshot.regions:
add_region(new_regions, region, nr_acc_to_add)
for region in nr_acc_to_add:
region.nr_accesses += nr_acc_to_add[region]
new_snapshot = DAMONSnapshot(snapshots[0].start_time,
snapshots[-1].end_time, snapshots[0].target_id)
new_snapshot.regions = new_regions
return new_snapshot