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54 // |
54 // |
55 // In order to deal with this, we are going to do a spin-wait if the simulator |
55 // In order to deal with this, we are going to do a spin-wait if the simulator |
56 // requires a delay less than a jiffy. This is on the order of one millisecond |
56 // requires a delay less than a jiffy. This is on the order of one millisecond |
57 // (999848 ns) on the ns-regression machine. |
57 // (999848 ns) on the ns-regression machine. |
58 // |
58 // |
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59 // If the underlying OS does not support posix clocks, we'll just assume a |
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60 // one millisecond quantum and deal with this as best we can |
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61 |
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62 #ifdef CLOCK_REALTIME |
59 struct timespec ts; |
63 struct timespec ts; |
60 clock_getres (CLOCK_REALTIME, &ts); |
64 clock_getres (CLOCK_REALTIME, &ts); |
61 m_jiffy = ts.tv_sec * NS_PER_SEC + ts.tv_nsec; |
65 m_jiffy = ts.tv_sec * NS_PER_SEC + ts.tv_nsec; |
62 NS_LOG_INFO ("Jiffy is " << m_jiffy << " ns"); |
66 NS_LOG_INFO ("Jiffy is " << m_jiffy << " ns"); |
63 |
67 #else |
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68 m_jiffy = 1000000; |
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69 #endif |
64 #if 0 |
70 #if 0 |
65 // |
71 // |
66 // DANGER DANGER WILL ROBINSON |
72 // DANGER DANGER WILL ROBINSON |
67 // |
73 // |
68 // Don't enable this code, su root and run a sim unless you really know what |
74 // Don't enable this code, su root and run a sim unless you really know what |