19 |
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|
20 |
|
/** |
21 |
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* Worst case rounding for millisecs; set for 60 cycle millis clock. |
22 |
< |
* This value might need to be changed os JVMs with coarser |
23 |
< |
* System.currentTimeMillis clocks. |
22 |
> |
* This value might need to be changed on JVMs with coarser |
23 |
> |
* System.currentTimeMillis clocks. |
24 |
|
*/ |
25 |
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static final long MILLIS_ROUND = 17; |
26 |
|
|
29 |
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* possible rounding). |
30 |
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* This shows only that nano timing not (much) worse than milli. |
31 |
|
*/ |
32 |
< |
public void testNanoTime1() { |
33 |
< |
try { |
34 |
< |
long m1 = System.currentTimeMillis(); |
35 |
< |
Thread.sleep(1); |
36 |
< |
long n1 = System.nanoTime(); |
37 |
< |
Thread.sleep(SHORT_DELAY_MS); |
38 |
< |
long n2 = System.nanoTime(); |
39 |
< |
Thread.sleep(1); |
40 |
< |
long m2 = System.currentTimeMillis(); |
41 |
< |
long millis = m2 - m1; |
42 |
< |
long nanos = n2 - n1; |
43 |
< |
assertTrue(nanos >= 0); |
44 |
< |
long nanosAsMillis = nanos / 1000000; |
45 |
< |
assertTrue(nanosAsMillis <= millis + MILLIS_ROUND); |
46 |
< |
} |
47 |
< |
catch (InterruptedException ie) { |
48 |
< |
unexpectedException(); |
49 |
< |
} |
32 |
> |
public void testNanoTime1() throws InterruptedException { |
33 |
> |
long m1 = System.currentTimeMillis(); |
34 |
> |
Thread.sleep(1); |
35 |
> |
long n1 = System.nanoTime(); |
36 |
> |
Thread.sleep(SHORT_DELAY_MS); |
37 |
> |
long n2 = System.nanoTime(); |
38 |
> |
Thread.sleep(1); |
39 |
> |
long m2 = System.currentTimeMillis(); |
40 |
> |
long millis = m2 - m1; |
41 |
> |
long nanos = n2 - n1; |
42 |
> |
assertTrue(nanos >= 0); |
43 |
> |
long nanosAsMillis = nanos / 1000000; |
44 |
> |
assertTrue(nanosAsMillis <= millis + MILLIS_ROUND); |
45 |
|
} |
46 |
|
|
47 |
|
/** |
49 |
|
* for rounding. |
50 |
|
* This shows only that nano timing not (much) worse than milli. |
51 |
|
*/ |
52 |
< |
public void testNanoTime2() { |
53 |
< |
try { |
54 |
< |
long n1 = System.nanoTime(); |
55 |
< |
Thread.sleep(1); |
56 |
< |
long m1 = System.currentTimeMillis(); |
57 |
< |
Thread.sleep(SHORT_DELAY_MS); |
58 |
< |
long m2 = System.currentTimeMillis(); |
59 |
< |
Thread.sleep(1); |
60 |
< |
long n2 = System.nanoTime(); |
61 |
< |
long millis = m2 - m1; |
67 |
< |
long nanos = n2 - n1; |
52 |
> |
public void testNanoTime2() throws InterruptedException { |
53 |
> |
long n1 = System.nanoTime(); |
54 |
> |
Thread.sleep(1); |
55 |
> |
long m1 = System.currentTimeMillis(); |
56 |
> |
Thread.sleep(SHORT_DELAY_MS); |
57 |
> |
long m2 = System.currentTimeMillis(); |
58 |
> |
Thread.sleep(1); |
59 |
> |
long n2 = System.nanoTime(); |
60 |
> |
long millis = m2 - m1; |
61 |
> |
long nanos = n2 - n1; |
62 |
|
|
63 |
< |
assertTrue(nanos >= 0); |
64 |
< |
long nanosAsMillis = nanos / 1000000; |
65 |
< |
assertTrue(millis <= nanosAsMillis + MILLIS_ROUND); |
72 |
< |
} |
73 |
< |
catch (InterruptedException ie) { |
74 |
< |
unexpectedException(); |
75 |
< |
} |
63 |
> |
assertTrue(nanos >= 0); |
64 |
> |
long nanosAsMillis = nanos / 1000000; |
65 |
> |
assertTrue(millis <= nanosAsMillis + MILLIS_ROUND); |
66 |
|
} |
67 |
|
|
68 |
|
} |