Yo Jacob E!
On Tue, 24 Feb 2015 22:32:40 +0000
"Keller, Jacob E" <jacob.e.kel...@intel.com> wrote:
> > > This is telling you that your clock time (CLOCK_REALTIME) is off
> > > by 70,000 seconds. That's not happy.
> >
> > Except my clock time is off by about 60 uSec. At least until
> > phc2sys tries to 'fix' the problem.
> >
>
> No. That is a mis-understanding. Your internal NIC clock is off by 60
> uSec.
No misunderstanding. My slave is NTP connected, so I KNOW the
system clock is off by 60 uSec from the clock master.
> Your REALTIME clock is not the NIC clock, but actually the
> kernel time,
Never thought otherwise.
> and *that* is what phc2sys offset is for.
Hmm, I see the confusion, I never mentioned my phc2sys offest. Until
it goes to 70,000 seconds....
> > > So this looks quit suspicious as a driver bug. Especially as it
> > > appears to be toggling between a large positive and negative
> > > value I am recalling something similar.
> >
> > Ouch. I am on an Intel I217-LM with the e1000e driver.
>
> Ya. I looked at the driver for this, but nothing was obvious. The
> issue I thought might be related appears to be fine in the 3.19
> kernel.
Another dead end...
> > Got a suggested config and procedure for that?
>
> Please just run your setup without running phc2sys, and use -l6 on
> ptp4l instead of -l7.
So, to be clear. is this exactly what you want me to try:
The ptp.conf:
[global]
clock_servo linreg
uds_address /var/run/ptp4l
# killall ptp4l phc2sys
# killall ptp4l phc2sys
# ptp4l -i eth0 -l 6 -m -f ptp.conf &
> See if you get the same clock jump issue or not.
Since my ptp4l is in linreg mode, it can not jump my system clock.
So what should I look for?
I just did that, looks ugly, but I really have no idea:
# killall ptp4l phc2sys
ptp4l: no process found
phc2sys: no process found
# ptp4l -i eth0 -l 6 -m -f ptp.conf
ptp4l[52360.386]: selected /dev/ptp0 as PTP clock
ptp4l[52360.386]: port 1: INITIALIZING to LISTENING on INITIALIZE
ptp4l[52360.386]: port 0: INITIALIZING to LISTENING on INITIALIZE
ptp4l[52362.144]: port 1: new foreign master 003048.fffe.345fe2-1
ptp4l[52366.144]: selected best master clock 003048.fffe.345fe2
ptp4l[52366.144]: foreign master not using PTP timescale
ptp4l[52366.144]: port 1: LISTENING to UNCALIBRATED on RS_SLAVE
ptp4l[52367.211]: master offset -99132 s0 freq +599999998 path delay
46363
ptp4l[52368.211]: master offset -107849 s0 freq +599999998 path delay
46363
ptp4l[52369.211]: master offset -125869 s0 freq +599999998 path delay
55328
ptp4l[52370.211]: master offset -134962 s1 freq +599994160 path delay
55306
ptp4l[52371.211]: master offset -599870879 s2 freq +186802553 path delay
55306
ptp4l[52371.211]: port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED
ptp4l[52372.211]: master offset -786797418 s2 freq -149872567 path delay
55306
ptp4l[52373.211]: master offset -637009628 s2 freq -599999999 path delay
58203
ptp4l[52374.211]: master offset -37092094 s2 freq -37208915 path delay
60342
ptp4l[52375.211]: master offset 244012 s2 freq +177926 path delay 58203
Strangely a kill and restart looks reasonable:
kong linuxptp # ptp4l -i eth0 -l 6 -m -f ptp.conf
ptp4l[52498.377]: selected /dev/ptp0 as PTP clock
ptp4l[52498.378]: port 1: INITIALIZING to LISTENING on INITIALIZE
ptp4l[52498.378]: port 0: INITIALIZING to LISTENING on INITIALIZE
ptp4l[52500.147]: port 1: new foreign master 003048.fffe.345fe2-1
ptp4l[52504.147]: selected best master clock 003048.fffe.345fe2
ptp4l[52504.147]: foreign master not using PTP timescale
ptp4l[52504.147]: port 1: LISTENING to UNCALIBRATED on RS_SLAVE
ptp4l[52506.215]: master offset -125996 s0 freq +177925 path delay 66149
ptp4l[52507.215]: master offset -114049 s0 freq +177925 path delay 46374
ptp4l[52508.215]: master offset -126964 s0 freq +177925 path delay 49315
ptp4l[52509.215]: master offset -136826 s1 freq +177442 path delay 52187
ptp4l[52510.215]: master offset -188068 s2 freq -21513 path delay 52187
ptp4l[52510.215]: port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED
ptp4l[52511.216]: master offset -176435 s2 freq -97696 path delay 52187
ptp4l[52512.215]: master offset -89938 s2 freq -100192 path delay 55059
ptp4l[52513.216]: master offset 1079 s2 freq -9460 path delay 54937
ptp4l[52514.215]: master offset 1241 s2 freq -8949 path delay 54937
ptp4l[52515.216]: master offset 1141 s2 freq -8099 path delay 54815
ptp4l[52516.216]: master offset 1815 s2 freq -7358 path delay 54242
ptp4l[52517.216]: master offset 2330 s2 freq -5907 path delay 51492
ptp4l[52518.216]: master offset -102 s2 freq -7236 path delay 51492
ptp4l[52519.216]: master offset -2551 s2 freq -10142 path delay 52478
ptp4l[52520.216]: master offset -1582 s2 freq -10594 path delay 53035
ptp4l[52521.216]: master offset -90 s2 freq -9519 path delay 53035
ptp4l[52522.216]: master offset 543 s2 freq -8594 path delay 53035
ptp4l[52523.216]: master offset -958 s2 freq -8997 path delay 54242
ptp4l[52524.216]: master offset -656 s2 freq -9885 path delay 54242
ptp4l[52525.216]: master offset -735 s2 freq -9723 path delay 54242
ptp4l[52526.216]: master offset 2322 s2 freq -8113 path delay 53035
ptp4l[52527.216]: master offset 1049 s2 freq -8521 path delay 53035
ptp4l[52528.216]: master offset 575 s2 freq -8585 path delay 53035
ptp4l[52529.216]: master offset 2479 s2 freq -7484 path delay 51843
ptp4l[52530.216]: master offset -655 s2 freq -8534 path delay 53237
ptp4l[52531.216]: master offset -3311 s2 freq -10634 path delay 54517
ptp4l[52532.216]: master offset -1199 s2 freq -9462 path delay 54517
ptp4l[52533.216]: master offset -542 s2 freq -9120 path delay 55101
ptp4l[52534.216]: master offset 529 s2 freq -8762 path delay 54517
ptp4l[52535.216]: master offset 2668 s2 freq -8258 path delay 51809
ptp4l[52536.216]: master offset 4866 s2 freq -7613 path delay 48985
ptp4l[52537.216]: master offset 2497 s2 freq -8015 path delay 48985
ptp4l[52538.216]: master offset 3183 s2 freq -7700 path delay 48012
ptp4l[52539.216]: master offset 3050 s2 freq -7731 path delay 48012
ptp4l[52540.216]: master offset -2442 s2 freq -8956 path delay 51809
ptp4l[52541.216]: master offset -5123 s2 freq -9862 path delay 53957
ptp4l[52542.216]: master offset -3089 s2 freq -9278 path delay 53957
ptp4l[52543.217]: master offset -1177 s2 freq -8960 path delay 52186
ptp4l[52544.216]: master offset -1132 s2 freq -9018 path delay 52186
ptp4l[52545.217]: master offset -1822 s2 freq -8931 path delay 52186
ptp4l[52546.217]: master offset 2700 s2 freq -8034 path delay 48389
ptp4l[52547.217]: master offset 39 s2 freq -9219 path delay 49659
ptp4l[52548.217]: master offset 276 s2 freq -8977 path delay 49659
ptp4l[52549.217]: master offset -2340 s2 freq -8971 path delay 52804
ptp4l[52550.217]: master offset -2604 s2 freq -8968 path delay 52804
ptp4l[52551.217]: master offset -2020 s2 freq -8958 path delay 52804
ptp4l[52552.217]: master offset 304 s2 freq -8816 path delay 49659
ptp4l[52553.217]: master offset 1610 s2 freq -8671 path delay 48560
ptp4l[52554.217]: master offset 3023 s2 freq -8503 path delay 47050
ptp4l[52555.217]: master offset 4238 s2 freq -8378 path delay 45505
It is possible the PLL is going nuts on startup?
> Also if you have the kernel documentation installed, you can use
> Documentation/ptp/testptp.c in order to read the PTP hardware clock
> directly.
>
> Try building that and running
Tried, failed:
kong ptp # make testptp
cc testptp.c -o testptp
/tmp/ccfvNFmZ.o: In function `main':
testptp.c:(.text+0xa78): undefined reference to `timer_create'
testptp.c:(.text+0xad8): undefined reference to `timer_settime'
testptp.c:(.text+0xb04): undefined reference to `timer_delete'
testptp.c:(.text+0xb50): undefined reference to `timer_create'
testptp.c:(.text+0xbbf): undefined reference to `timer_settime'
collect2: error: ld returned 1 exit status
<builtin>: recipe for target 'testptp' failed
make: *** [testptp] Error 1
Ideas?
> ./testptp -g -d /dev/ptpX
>
> Where ptpX is your device's ptp device, which you can see via ethtool
> -T
>
> You can use that to sanity check whether the PTP device is being set
> correctly. It should match your remote PTP master's time.
If I can build it...
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
g...@rellim.com Tel:+1(541)382-8588
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