2 ms·
A lot of intel 1G adapters do too, likely including the one in your laptop. $ lspci -s 0:1f.6 00:1f.6 Ethernet controller: Intel Corporation Ethernet Conne
by eqvinox 6y ago
A lot of intel 1G adapters do too, likely including the one in your laptop.
$ lspci -s 0:1f.6
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (4) I219-V (rev 21)
$ sudo ethtool -T enp0s31f6
Time stamping parameters for enp0s31f6:
Capabilities:
hardware-transmit
software-transmit
hardware-receive
software-receive
software-system-clock
hardware-raw-clock
PTP Hardware Clock: 0
Hardware Transmit Timestamp Modes:
off
on
Hardware Receive Filter Modes:
none
all
ptpv1-l4-sync
ptpv1-l4-delay-req
ptpv2-l4-sync
ptpv2-l4-delay-req
ptpv2-l2-sync
ptpv2-l2-delay-req
ptpv2-event
ptpv2-sync
ptpv2-delay-req
- mlyle 6y agoYup-- I didn't know the prevalence so I didn't say. You're wrong though-- there's no ethernet adapter in my laptop ;)
- eqvinox 6y agoTouché :D (sadly, 802.11 timestamping on wifi is very fringe...)
- Unklejoe 6y agoIt's hard to do PTP reliably over WiFi since the symmetry in both directions (client<->ap) isn't really consistent. It _does_ sort of work though.
- mlyle 6y agoIt could be made to work fairly well with hardware / driver support. Timing information of frames is known rather precisely, and delay spread is <100ns in most environments.