Time is lagging substantially on Netgear ReadyNAS RN102 and RN104
Posted by tme
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Re: Time is lagging substantially on Netgear ReadyNAS RN102 and RN104 April 01, 2023 02:28PM |
Admin Registered: 12 years ago Posts: 17,689 |
Hi Trond,
> for providing these outdated kernels for testing.
> On Netgear RN102, the lagging issue is present in
> both Linux 4.20.6 and 5.8.5.
> So the issue has been around since at least March
> 2019. Then we know that it has not been introduced
> by any of the more resent patches to the kernel or
> the device tree.
Bummer! I hope it were a regression somewhere.
It's been a while, I forgot, if stock OS have this problem or just in Linux? If stock runs OK then it must be some SoC specific configuration that we are missing.
-bodhi
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> for providing these outdated kernels for testing.
> On Netgear RN102, the lagging issue is present in
> both Linux 4.20.6 and 5.8.5.
> So the issue has been around since at least March
> 2019. Then we know that it has not been introduced
> by any of the more resent patches to the kernel or
> the device tree.
Bummer! I hope it were a regression somewhere.
It's been a while, I forgot, if stock OS have this problem or just in Linux? If stock runs OK then it must be some SoC specific configuration that we are missing.
-bodhi
===========================
Forum Wiki
bodhi's corner
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Re: Time is lagging substantially on Netgear ReadyNAS RN102 and RN104 April 02, 2023 03:01AM |
Registered: 8 years ago Posts: 391 |
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Re: Time is lagging substantially on Netgear ReadyNAS RN102 and RN104 April 10, 2023 12:42PM |
Registered: 6 years ago Posts: 140 |
Hi rayknight,
Great suggestion!
I downloaded the Linux kernel version 4.4.1 'uImage' and the Debian installer 'uInitrd' for "Efikamx mx5" from Natisbad to a USB stick, placed it in the front port of my RN102 and, using serial console, modified the U-Boot environment as for a first install. The outdated installer was not able to complete due to missing mirrors for Debian 7 (Wheezy), but escaping to a shell made it possible to access '/dev/uptime':
The time between the two 'cat' commands was 60 s, but the system clock gained only 55 s.
Repeating the test with Linux kernel version 3.14.44 gave a similar result:
I conclude that the time lagging issue with the mainline Linux kernel for Netgear RN102 and RN104 has been there "forever".
Regards,
Trond Melen
Quote
Perhaps you should try the kernel images hosted at Natisbad (where support for the device was first introduced) to see if the issue has been present from the introduction of support for this device.
Great suggestion!
I downloaded the Linux kernel version 4.4.1 'uImage' and the Debian installer 'uInitrd' for "Efikamx mx5" from Natisbad to a USB stick, placed it in the front port of my RN102 and, using serial console, modified the U-Boot environment as for a first install. The outdated installer was not able to complete due to missing mirrors for Debian 7 (Wheezy), but escaping to a shell made it possible to access '/dev/uptime':
~ # uname -a Linux RN102 4.4.1.rn102 #1 Tue Feb 9 23:58:40 CET 2016 armv7l GNU/Linux ~ # cat /proc/uptime 326.53 312.33 ~ # cat /proc/uptime 381.52 367.32 ~ #
The time between the two 'cat' commands was 60 s, but the system clock gained only 55 s.
Repeating the test with Linux kernel version 3.14.44 gave a similar result:
BusyBox v1.20.2 (Debian 1:1.20.0-7) built-in shell (ash) Enter 'help' for a list of built-in commands. ~ # uname -a Linux RN102 3.14.44.rn102 #1 Thu Jun 11 18:30:21 CEST 2015 armv7l GNU/Linux ~ # cat /proc/uptime 113.57 99.86 ~ # cat /proc/uptime 168.80 155.08 ~ #
I conclude that the time lagging issue with the mainline Linux kernel for Netgear RN102 and RN104 has been there "forever".
Regards,
Trond Melen
