1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
#! /usr/bin/env stap
# this many complete test iterations
@define ITERCNT %( 10 %)
# this many <<< operations per batch, before checking time
@define BATCH %( 65536 %)
# this many microseconds total to run batches for
@define BATCHTIME %( 50000 %)
@define time
%(
%( runtime == "dyninst" %?
gettimeofday_us()
%:
cpu_clock_us(cpu())
%)
%)
@define feed(agg, nagg)
%(
t1 = @time
cnt = 0
while (1)
{
cnt++
if (cnt % @BATCH == 0) # ensure we don't call time functions so frequently that they outweigh the payload
if (@time > (t1 + @BATCHTIME)) break
@agg <<< cnt # This is the operation whose runtime we actually want to measure!
}
@nagg = @nagg + cnt
%)
global a, na = 0
global b, nb = 0
global c, nc = 0
global d, nd = 0
probe begin
{
for (i=0; i<@ITERCNT; i++)
{
@feed(a, na)
@feed(b, nb)
@feed(c[1], nc)
@feed(d[1], nd)
}
exit()
}
probe end
{
println("REM na=", na)
println("REM @count(a)=", @count(a))
println("REM nb=", nb)
println("REM @variance(b)=", @variance(b))
println("REM nc=", nc)
println("REM @count(c[1])=", @count(c[1]))
println("REM nd=", nd)
println("REM @variance(d[1])=", @variance(d[1]))
if ((na > nb) && (nc > nd))
println("TEST_PASS")
else
println("TEST_FAIL")
}
|
