diff options
Diffstat (limited to 'tcpdump.1.in')
| -rw-r--r-- | tcpdump.1.in | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/tcpdump.1.in b/tcpdump.1.in index f9522cb8..ebf50ab6 100644 --- a/tcpdump.1.in +++ b/tcpdump.1.in @@ -1882,11 +1882,15 @@ is the current clock time in the form .fi .RE and is as accurate as the kernel's clock. -The timestamp reflects the time the kernel first saw the packet. -No attempt -is made to account for the time lag between when the -Ethernet interface removed the packet from the wire and when the kernel -serviced the `new packet' interrupt. +The timestamp reflects the time the kernel applied a time stamp to the packet. +No attempt is made to account for the time lag between when the network +interface finished receiving the packet from the network and when the +kernel applied a time stamp to the packet; that time lag could include a +delay between the time when the network interface finished receiving a +packet from the network and the time when an interrupt was delivered to +the kernel to get it to read the packet and a delay between the time +when the kernel serviced the `new packet' interrupt and the time when it +applied a time stamp to the packet. .SH "SEE ALSO" stty(1), pcap(3PCAP), bpf(4), nit(4P), pcap-savefile(@MAN_FILE_FORMATS@), pcap-filter(@MAN_MISC_INFO@), pcap-tstamp(@MAN_MISC_INFO@) |