tcpdump mailing list archives
Re: Hardware Timestamping Problem
From: Christian <christian.rupp.stuttgart () freenet de>
Date: Thu, 9 Jun 2016 16:17:51 +0200
The experiments I made today actually suggest that in my case tcpdump uses the hardware clock for incoming packages and the software/unix clock for outgoing packages.
I changed the System clock of one Server with date -s and then looked at the capture of Ping packages. Incoming packages on the changed server used the hardware clock while outgoing packages used the changed system clock.
Is there a way to change that? Am 09.06.2016 um 15:47 schrieb Michael Richardson:
Guenter Ebermann <guenter.ebermann () googlemail com> wrote: > Hardware timestamping of sending/receiving buffer descriptors is done > by NIC. Receiving I understand. Are you sure that the hardware is going to timestamp sent packets, and then turn around and send the back to the kernel?
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Current thread:
- Re: Hardware Timestamping Problem, (continued)
- Re: Hardware Timestamping Problem Michael Richardson (Jun 08)
- Message not available
- Re: Hardware Timestamping Problem Michael Richardson (Jun 08)
- Re: Hardware Timestamping Problem Christian Rupp (Jun 08)
- Message not available
- Re: Hardware Timestamping Problem Michael Richardson (Jun 08)
- Re: Hardware Timestamping Problem Guy Harris (Jun 08)
- Re: Hardware Timestamping Problem Christian Rupp (Jun 08)
- Re: Hardware Timestamping Problem Guy Harris (Jun 08)
- Re: Hardware Timestamping Problem Christian (Jun 09)
- Re: Hardware Timestamping Problem Michael Richardson (Jun 08)
- Re: Hardware Timestamping Problem Guenter Ebermann (Jun 08)
- Re: Hardware Timestamping Problem Michael Richardson (Jun 09)
- Re: Hardware Timestamping Problem Christian (Jun 09)
- Re: Hardware Timestamping Problem Guenter Ebermann (Jun 09)
- Re: Hardware Timestamping Problem Guy Harris (Jun 09)
- Re: Hardware Timestamping Problem Guenter Ebermann (Jun 09)
- Re: Hardware Timestamping Problem Guy Harris (Jun 09)
- Re: Hardware Timestamping Problem Guenter Ebermann (Jun 09)
- Re: Hardware Timestamping Problem Guy Harris (Jun 09)
- Re: Hardware Timestamping Problem Christian Rupp (Jun 08)