linuxptp-users

[Linuxptp-users] phc2sys required when running ptp4l as master?

[Fabian S. <fab...@ya...>]

I am using ptp4l with version 1.6-00002-g999c86f.

This is my startline:

/home/test/linuxptp/ptp4l -E -4 -H -i p1p1


The network card is a Intel 82574L with the following time capabilites:

Time stamping parameters for p1p1:
Capabilities:
hardware-transmit     (SOF_TIMESTAMPING_TX_HARDWARE)
software-transmit     (SOF_TIMESTAMPING_TX_SOFTWARE)
hardware-receive      (SOF_TIMESTAMPING_RX_HARDWARE)
software-receive      (SOF_TIMESTAMPING_RX_SOFTWARE)
software-system-clock (SOF_TIMESTAMPING_SOFTWARE)
hardware-raw-clock    (SOF_TIMESTAMPING_RAW_HARDWARE)
PTP Hardware Clock: 0
Hardware Transmit Timestamp Modes:
off                   (HWTSTAMP_TX_OFF)
on                    (HWTSTAMP_TX_ON)
Hardware Receive Filter Modes:
none                  (HWTSTAMP_FILTER_NONE)
all                   (HWTSTAMP_FILTER_ALL)
ptpv1-l4-sync         (HWTSTAMP_FILTER_PTP_V1_L4_SYNC)
ptpv1-l4-delay-req    (HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ)
ptpv2-l4-sync         (HWTSTAMP_FILTER_PTP_V2_L4_SYNC)
ptpv2-l4-delay-req    (HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ)
ptpv2-l2-sync         (HWTSTAMP_FILTER_PTP_V2_L2_SYNC)
ptpv2-l2-delay-req    (HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ)
ptpv2-event           (HWTSTAMP_FILTER_PTP_V2_EVENT)
ptpv2-sync            (HWTSTAMP_FILTER_PTP_V2_SYNC)
ptpv2-delay-req       (HWTSTAMP_FILTER_PTP_V2_DELAY_REQ)


Do I need to use phc2sys on the master too to syncronize the time between the network clock and CLOCK_REALTIME? Or is ptp4l already doing that?

Re: [Linuxptp-users] phc2sys required when running ptp4l as master?

[Richard C. <ric...@gm...>]

On Mon, Mar 07, 2016 at 09:22:57AM +0000, Fabian Schörghofer wrote:
> Do I need to use phc2sys on the master too to syncronize the time
> between the network clock and CLOCK_REALTIME?

Yes.

> Or is ptp4l already doing that?

No.

Thanks,
Richard