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-rwxr-xr-xsrc/chattyparser.py94
1 files changed, 68 insertions, 26 deletions
diff --git a/src/chattyparser.py b/src/chattyparser.py
index 3c64ed7..586bccb 100755
--- a/src/chattyparser.py
+++ b/src/chattyparser.py
@@ -16,7 +16,6 @@
#
# You should have received a copy of the GNU General Public License
# along with allocbench. If not, see <http://www.gnu.org/licenses/>.
-
"""Parser and Plotter for the traces produced by chattymalloc"""
import re
@@ -34,19 +33,35 @@ FREE_RE = re.compile(f"^f {PTR}$")
CALLOC_RE = re.compile(f"^c (?P<nmemb>\\d+) {SIZE} {PTR}$")
REALLOC_RE = re.compile(f"^r {PTR} {SIZE} {PTR.replace('ptr', 'nptr')}$")
MEMALIGN_RE = re.compile(f"^ma {ALIGNMENT} {SIZE} {PTR}$")
-POSIX_MEMALIGN_RE = re.compile(f"^p_ma {PTR} {ALIGNMENT} {SIZE} (?P<ret>\\d+)$")
+POSIX_MEMALIGN_RE = re.compile(
+ f"^p_ma {PTR} {ALIGNMENT} {SIZE} (?P<ret>\\d+)$")
VALLOC_RE = re.compile(f"^v {SIZE} {PTR}$")
PVALLOC_RE = re.compile(f"^pv {SIZE} {PTR}$")
ALIGNED_ALLOC_RE = re.compile(f"^a_m {ALIGNMENT} {SIZE} {PTR}$")
-TRACE_REGEX = {"malloc": MALLOC_RE, "free": FREE_RE, "calloc": CALLOC_RE,
- "realloc": REALLOC_RE, "memalign": MEMALIGN_RE,
- "posix_memalign": POSIX_MEMALIGN_RE, "valloc": VALLOC_RE,
- "pvalloc": PVALLOC_RE, "aligned_alloc": ALIGNED_ALLOC_RE}
-
-
-def record_allocation(hist, total_size, allocations, ptr, size, coll_size,
- req_size, nohist, optr=None, free=False):
+TRACE_REGEX = {
+ "malloc": MALLOC_RE,
+ "free": FREE_RE,
+ "calloc": CALLOC_RE,
+ "realloc": REALLOC_RE,
+ "memalign": MEMALIGN_RE,
+ "posix_memalign": POSIX_MEMALIGN_RE,
+ "valloc": VALLOC_RE,
+ "pvalloc": PVALLOC_RE,
+ "aligned_alloc": ALIGNED_ALLOC_RE
+}
+
+
+def record_allocation(hist,
+ total_size,
+ allocations,
+ ptr,
+ size,
+ coll_size,
+ req_size,
+ nohist,
+ optr=None,
+ free=False):
"""add allocation to histogram or total requested memory
hist - dict mapping allocation sizes to their occurrence
@@ -97,14 +112,26 @@ def record_allocation(hist, total_size, allocations, ptr, size, coll_size,
total_size.append(total_size[-1])
-def parse(path="chattymalloc.txt", coll_size=True, req_size=None, nohist=False):
+def parse(path="chattymalloc.txt",
+ coll_size=True,
+ req_size=None,
+ nohist=False):
"""parse a chattymalloc trace
:returns: a histogram dict, a dict of occurred function calls, list of total requested memory
"""
# count function calls
- calls = {"malloc": 0, "free": 0, "calloc": 0, "realloc": 0, "memalign": 0,
- "posix_memalign": 0, "valloc": 0, "pvalloc": 0, "aligned_alloc": 0}
+ calls = {
+ "malloc": 0,
+ "free": 0,
+ "calloc": 0,
+ "realloc": 0,
+ "memalign": 0,
+ "posix_memalign": 0,
+ "valloc": 0,
+ "pvalloc": 0,
+ "aligned_alloc": 0
+ }
# Dictionary to track all live allocations
allocations = {}
# List of total live memory per operation
@@ -129,7 +156,8 @@ def parse(path="chattymalloc.txt", coll_size=True, req_size=None, nohist=False):
if func == "free":
record(res["ptr"], 0, free=True)
elif func == "calloc":
- record(res["ptr"], int(res["nmemb"]) * int(res["size"]))
+ record(res["ptr"],
+ int(res["nmemb"]) * int(res["size"]))
elif func == "realloc":
record(res["nptr"], res["size"], optr=res["ptr"])
else:
@@ -161,8 +189,11 @@ def plot_profile(total_sizes, trace_path, plot_path, sizes):
"""Plot a memory profile of the total memory and the top 5 sizes"""
x_vals = range(0, len(total_sizes))
- plt.plot(x_vals, total_sizes / 1000, marker='',
- linestyle='-', label="Total requested")
+ plt.plot(x_vals,
+ total_sizes / 1000,
+ marker='',
+ linestyle='-',
+ label="Total requested")
for size in sizes:
_, _, total_size = parse(path=trace_path, nohist=True, req_size=size)
@@ -175,10 +206,11 @@ def plot_profile(total_sizes, trace_path, plot_path, sizes):
plt.savefig(plot_path)
plt.clf()
+
def plot_hist_ascii(path, hist, calls):
"""Plot an ascii histogram"""
# make sure all sizes are stored as ints
- for nonint_key in [key for key in hist.keys() if type(key) is not int]:
+ for nonint_key in [key for key in hist.keys() if not isinstance(key, int)]:
hist[int(nonint_key)] = hist[nonint_key]
del hist[nonint_key]
@@ -187,7 +219,6 @@ def plot_hist_ascii(path, hist, calls):
size_class = size // 16
bins[size_class] = bins.get(size_class, 0) + hist[size]
-
with open(path, "w") as hist_file:
print("Total function calls:", sum(calls.values()), file=hist_file)
for func, func_calls in calls.items():
@@ -199,14 +230,19 @@ def plot_hist_ascii(path, hist, calls):
top10 = [t[1] for t in sorted([(n, s) for s, n in hist.items()])[-10:]]
top10_total = sum([hist[size] for size in top10])
- print(f"Top 10 allocation sizes {(top10_total/total)*100:.2f}% of all allocations", file=hist_file)
+ print(
+ f"Top 10 allocation sizes {(top10_total/total)*100:.2f}% of all allocations",
+ file=hist_file)
for i, size in enumerate(reversed(top10)):
- print(f"{i+1}. {size} B occurred {hist[size]} times", file=hist_file)
+ print(f"{i+1}. {size} B occurred {hist[size]} times",
+ file=hist_file)
print(file=hist_file)
for i in [64, 1024, 4096]:
allocations = sum([n for s, n in hist.items() if s <= i])
- print(f"allocations <= {i}: {allocations} {(allocations/total)*100:.2f}%", file=hist_file)
+ print(
+ f"allocations <= {i}: {allocations} {(allocations/total)*100:.2f}%",
+ file=hist_file)
print(file=hist_file)
print("Histogram of sizes:", file=hist_file)
@@ -214,11 +250,14 @@ def plot_hist_ascii(path, hist, calls):
binmaxlength = len(str(sbins[-1])) + 1
amountmaxlength = str(len(str(sorted(bins.values())[-1])))
for current_bin in sbins:
- perc = bins[current_bin]/total*100
+ perc = bins[current_bin] / total * 100
binsize = f"{{:<{binmaxlength}}} - {{:>{binmaxlength}}}"
- print(binsize.format(current_bin*16, (current_bin+1)*16-1), end=" ", file=hist_file)
+ print(binsize.format(current_bin * 16, (current_bin + 1) * 16 - 1),
+ end=" ",
+ file=hist_file)
amount = "{:<" + amountmaxlength + "} {:.2f}% {}"
- print(amount.format(bins[current_bin], perc, '*'*int(perc/2)), file=hist_file)
+ print(amount.format(bins[current_bin], perc, '*' * int(perc / 2)),
+ file=hist_file)
if __name__ == "__main__":
@@ -226,12 +265,15 @@ if __name__ == "__main__":
# to keep chattyparser independent from allocbench
if "--license" in sys.argv:
print("Copyright (C) 2018-2019 Florian Fischer")
- print("License GPLv3: GNU GPL version 3 <http://gnu.org/licenses/gpl.html>")
+ print(
+ "License GPLv3: GNU GPL version 3 <http://gnu.org/licenses/gpl.html>"
+ )
sys.exit(0)
if len(sys.argv) != 2 or sys.argv[1] in ["-h", "--help"]:
print("chattyparser: parse chattymalloc output and",
- "create size histogram and memory profile", file=sys.stderr)
+ "create size histogram and memory profile",
+ file=sys.stderr)
print(f"Usage: {sys.argv[0]} chattymalloc-file", file=sys.stderr)
sys.exit(1)
generated by cgit v1.2.3 (git 2.25.1) at 2026-04-23 18:13:09 +0000