The system time interval between Arm and Ubuntu

Problem Description: With Arm machine as a Server, with Ubuntu as a Client, Server via the Client send time package to sync that time, after synced time, Comparing their time, I found that with a continuation of the time, the time difference is bigger and bigger, I suspect that may be Arm machines and the Client's clock is not consistent, Coule you help me with this? Thanks.

Test Environment: Arm machine: zcu104 development board, with the soc on top is Zynq UltraScale+MPSoC xczu7ev-2ffvc1156.

Client machine: the normal Ubuntu system, we used three Ubuntu system machines, test many times can reproduce this phenomenon.

At the same time, the test adopts the direct connection mode of the machine, which can basically ignore the interference of network problems, so the test results are credible.

Sync Time Func:

gettimeofday()

settimeofday()

Post the results and the environment:

value is in milliseconds

print every 6s

diff- -1 diff- -1 diff- 0 diff- -1 diff- 0 diff- 0 diff- 1 diff- 1 diff- 2 diff- 3 diff- 2 diff- 2 diff- 4 diff- 4 diff- 5 diff- 5 diff- 5 diff- 5 diff- 6 diff- 7 diff- 7 diff- 6 diff- 7 diff- 7 diff- 7 diff- 8 diff- 8 diff- 9 diff- 9 diff- 10 diff- 10 diff- 10 diff- 10 diff- 12 diff- 12 diff- 12 diff- 12 diff- 12 diff- 13 diff- 13 diff- 14 diff- 14 diff- 15 diff- 15 diff- 15 diff- 15 diff- 16 diff- 16 diff- 16 diff- 17 diff- 17 diff- 18 diff- 18 diff- 18 diff- 18 diff- 19 diff- 19 diff- 20 diff- 21 diff- 21 diff- 21 diff- 21 diff- 22 diff- 22 diff- 23 diff- 23 diff- 23

Ubuntu cpu(Twelve processors): uname -a:Linux ITSK-20190401KK 4.4.0-17763-Microsoft #379-Microsoft Wed Mar 06 19:16:00 PST 2019 x86_64 x86_64 x86_64 GNU/Linux cat /proc/cpuinfo: model name : Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz stepping : 10 microcode : 0xffffffff cpu MHz : 3192.000 cache size : 256 KB

Arm cpu(Four processors): cat /proc/cpuinfo has not useful output uname -a:Linux xilinx-zcu104-2018_3 4.14.0-xilinx-v2018.3 #65 SMP Mon May 13 21:25:05 CST 2019 aarch64 GNU/Linux