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Linux kernel source tree
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When CPTS clock is sync/adjusted by running linuxptp (ptp4l) it will cause
PPS jitter as Genf running PPS is not adjusted.
The same PPM adjustment has to be applied to GenF as to PHC clock to
correct PPS length and keep them in sync.
Testing:
Master:
ptp4l -P -2 -H -i eth0 -l 6 -m -q -p /dev/ptp1 -f ptp.cfg &
testptp -d /dev/ptp1 -P 1
ppstest /dev/pps0
Slave:
linuxptp/ptp4l -P -2 -H -i eth0 -l 6 -m -q -p /dev/ptp1 -f ptp1.cfg -s &
<port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED;>
testptp -d /dev/ptp1 -P 1
ppstest /dev/pps0
Master log:
source 0 - assert 620.000000689, sequence: 530
source 0 - assert 621.000000689, sequence: 531
source 0 - assert 622.000000689, sequence: 532
source 0 - assert 623.000000689, sequence: 533
source 0 - assert 624.000000689, sequence: 534
source 0 - assert 625.000000689, sequence: 535
source 0 - assert 626.000000689, sequence: 536
source 0 - assert 627.000000689, sequence: 537
source 0 - assert 628.000000689, sequence: 538
source 0 - assert 629.000000689, sequence: 539
source 0 - assert 630.000000689, sequence: 540
source 0 - assert 631.000000689, sequence: 541
source 0 - assert 632.000000689, sequence: 542
source 0 - assert 633.000000689, sequence: 543
source 0 - assert 634.000000689, sequence: 544
source 0 - assert 635.000000689, sequence: 545
Slave log:
source 0 - assert 620.000000706, sequence: 252
source 0 - assert 621.000000709, sequence: 253
source 0 - assert 622.000000707, sequence: 254
source 0 - assert 623.000000707, sequence: 255
source 0 - assert 624.000000706, sequence: 256
source 0 - assert 625.000000705, sequence: 257
source 0 - assert 626.000000709, sequence: 258
source 0 - assert 627.000000709, sequence: 259
source 0 - assert 628.000000707, sequence: 260
source 0 - assert 629.000000706, sequence: 261
source 0 - assert 630.000000710, sequence: 262
source 0 - assert 631.000000708, sequence: 263
source 0 - assert 632.000000705, sequence: 264
source 0 - assert 633.000000710, sequence: 265
source 0 - assert 634.000000708, sequence: 266
source 0 - assert 635.000000707, sequence: 267
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.