1STRUCT SKB_SHARED_HW(9) Linux Networking STRUCT SKB_SHARED_HW(9)
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6 struct_skb_shared_hwtstamps - hardware time stamps
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9 struct skb_shared_hwtstamps {
10 ktime_t hwtstamp;
11 ktime_t syststamp;
12 };
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15 hwtstamp
16 hardware time stamp transformed into duration since arbitrary point
17 in time
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19 syststamp
20 hwtstamp transformed to system time base
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23 Software time stamps generated by ktime_get_real are stored in
24 skb->tstamp. The relation between the different kinds of time
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27 syststamp and tstamp can be compared against each other in arbitrary
28 combinations. The accuracy of a syststamp/tstamp/“syststamp from other
29 device” comparison is limited by the accuracy of the transformation
30 into system time base. This depends on the device driver and its
31 underlying hardware.
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33 hwtstamps can only be compared against other hwtstamps from the same
34 device.
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36 This structure is attached to packets as part of the skb_shared_info.
37 Use skb_hwtstamps to get a pointer.
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40Kernel Hackers Manual 2.6. June 2019 STRUCT SKB_SHARED_HW(9)