62 lines
1.4 KiB
Python
Executable File
62 lines
1.4 KiB
Python
Executable File
#!/usr/bin/python
|
|
# @lint-avoid-python-3-compatibility-imports
|
|
#
|
|
# vfscount Count VFS calls ("vfs_*").
|
|
# For Linux, uses BCC, eBPF. See .c file.
|
|
#
|
|
# Written as a basic example of counting functions.
|
|
#
|
|
# Copyright (c) 2015 Brendan Gregg.
|
|
# Licensed under the Apache License, Version 2.0 (the "License")
|
|
#
|
|
# 14-Aug-2015 Brendan Gregg Created this.
|
|
|
|
from __future__ import print_function
|
|
from bcc import BPF
|
|
from time import sleep
|
|
from sys import argv
|
|
def usage():
|
|
print("USAGE: %s [time]" % argv[0])
|
|
exit()
|
|
|
|
interval = 99999999
|
|
if len(argv) > 1:
|
|
try:
|
|
interval = int(argv[1])
|
|
if interval == 0:
|
|
raise
|
|
except: # also catches -h, --help
|
|
usage()
|
|
# load BPF program
|
|
b = BPF(text="""
|
|
#include <uapi/linux/ptrace.h>
|
|
|
|
struct key_t {
|
|
u64 ip;
|
|
};
|
|
|
|
BPF_HASH(counts, struct key_t, u64, 256);
|
|
|
|
int do_count(struct pt_regs *ctx) {
|
|
struct key_t key = {};
|
|
key.ip = PT_REGS_IP(ctx);
|
|
counts.atomic_increment(key);
|
|
return 0;
|
|
}
|
|
""")
|
|
b.attach_kprobe(event_re="^vfs_.*", fn_name="do_count")
|
|
|
|
# header
|
|
print("Tracing... Ctrl-C to end.")
|
|
|
|
# output
|
|
try:
|
|
sleep(interval)
|
|
except KeyboardInterrupt:
|
|
pass
|
|
|
|
print("\n%-16s %-26s %8s" % ("ADDR", "FUNC", "COUNT"))
|
|
counts = b.get_table("counts")
|
|
for k, v in sorted(counts.items(), key=lambda counts: counts[1].value):
|
|
print("%-16x %-26s %8d" % (k.ip, b.ksym(k.ip), v.value))
|