Linux Perf
stat-cpi.py
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1 #!/usr/bin/env python
2 # SPDX-License-Identifier: GPL-2.0
3 
4 data = {}
5 times = []
6 threads = []
7 cpus = []
8 
9 def get_key(time, event, cpu, thread):
10  return "%d-%s-%d-%d" % (time, event, cpu, thread)
11 
12 def store_key(time, cpu, thread):
13  if (time not in times):
14  times.append(time)
15 
16  if (cpu not in cpus):
17  cpus.append(cpu)
18 
19  if (thread not in threads):
20  threads.append(thread)
21 
22 def store(time, event, cpu, thread, val, ena, run):
23  #print "event %s cpu %d, thread %d, time %d, val %d, ena %d, run %d" % \
24  # (event, cpu, thread, time, val, ena, run)
25 
26  store_key(time, cpu, thread)
27  key = get_key(time, event, cpu, thread)
28  data[key] = [ val, ena, run]
29 
30 def get(time, event, cpu, thread):
31  key = get_key(time, event, cpu, thread)
32  return data[key][0]
33 
34 def stat__cycles_k(cpu, thread, time, val, ena, run):
35  store(time, "cycles", cpu, thread, val, ena, run);
36 
37 def stat__instructions_k(cpu, thread, time, val, ena, run):
38  store(time, "instructions", cpu, thread, val, ena, run);
39 
40 def stat__cycles_u(cpu, thread, time, val, ena, run):
41  store(time, "cycles", cpu, thread, val, ena, run);
42 
43 def stat__instructions_u(cpu, thread, time, val, ena, run):
44  store(time, "instructions", cpu, thread, val, ena, run);
45 
46 def stat__cycles(cpu, thread, time, val, ena, run):
47  store(time, "cycles", cpu, thread, val, ena, run);
48 
49 def stat__instructions(cpu, thread, time, val, ena, run):
50  store(time, "instructions", cpu, thread, val, ena, run);
51 
52 def stat__interval(time):
53  for cpu in cpus:
54  for thread in threads:
55  cyc = get(time, "cycles", cpu, thread)
56  ins = get(time, "instructions", cpu, thread)
57  cpi = 0
58 
59  if ins != 0:
60  cpi = cyc/float(ins)
61 
62  print "%15f: cpu %d, thread %d -> cpi %f (%d/%d)" % (time/(float(1000000000)), cpu, thread, cpi, cyc, ins)
63 
64 def trace_end():
65  pass
66 # XXX trace_end callback could be used as an alternative place
67 # to compute same values as in the script above:
68 #
69 # for time in times:
70 # for cpu in cpus:
71 # for thread in threads:
72 # cyc = get(time, "cycles", cpu, thread)
73 # ins = get(time, "instructions", cpu, thread)
74 #
75 # if ins != 0:
76 # cpi = cyc/float(ins)
77 #
78 # print "time %.9f, cpu %d, thread %d -> cpi %f" % (time/(float(1000000000)), cpu, thread, cpi)
def stat__instructions_u(cpu, thread, time, val, ena, run)
Definition: stat-cpi.py:43
def store_key(time, cpu, thread)
Definition: stat-cpi.py:12
def trace_end()
Definition: stat-cpi.py:64
def get(time, event, cpu, thread)
Definition: stat-cpi.py:30
def stat__cycles_k(cpu, thread, time, val, ena, run)
Definition: stat-cpi.py:34
def stat__cycles(cpu, thread, time, val, ena, run)
Definition: stat-cpi.py:46
def stat__cycles_u(cpu, thread, time, val, ena, run)
Definition: stat-cpi.py:40
def get_key(time, event, cpu, thread)
Definition: stat-cpi.py:9
def stat__instructions_k(cpu, thread, time, val, ena, run)
Definition: stat-cpi.py:37
def stat__instructions(cpu, thread, time, val, ena, run)
Definition: stat-cpi.py:49
def stat__interval(time)
Definition: stat-cpi.py:52
def store(time, event, cpu, thread, val, ena, run)
Definition: stat-cpi.py:22