More stats on the admin page

Channels DVR Server Feature Requests
#1

At least on RPi it would be useful to know the temperature and throttling status.

One way to do it would be the vcgencmd

$ vcgencmd measure_temp
temp=54.0'C

$ vcgencmd get_throttled
throttled=0x0

get_throttled 
   get_throttled
          Returns the throttled state of the system. This is a bit pattern - a bit being set indicates the following meanings:

          Bit   Meaning
          ────  ────────────────────────────────────
           0    Under-voltage detected
           1    Arm frequency capped
           2    Currently throttled
           3    Soft temperature limit active
          16    Under-voltage has occurred
          17    Arm frequency capping has occurred
          18    Throttling has occurred
          19    Soft temperature limit has occurred

          A value of zero indicates that none of the above conditions is true.

          To find if one of these bits has been set, convert the value returned to binary, then number each bit along the top. You can then see which bits are set. For example:

          0x50000 = 0101 0000 0000 0000 0000

          Adding the bit numbers along the top we get:

          19   18   17   16   15   14   13   12   11   10   9   8   7   6   5   4   3   2   1   0
           0    1    0    1    0    0    0    0    0    0   0   0   0   0   0   0   0   0   0   0

          From this we can see that bits 18 and 16 are set, indicating that the Pi has previously been throttled due to under-voltage, but is not currently throttled for any reason.
#2

This is already present in the official image.

1 Like
#3

Nice. Any chance this feature will make it into the installable package?
I installed cooling and started overclocking as of recent:

over_voltage=6
arm_freq=2100
gpu_freq=750

BETA: Channels DVR Server for Raspberry Pi 4 (USB BOOT IMAGE)
#4

If you not running official RPi image, another way to monitor it is just to keep a separate shell window open.

watch -n1 vcgencmd measure_temp

#5

I am looking for the benefit of the average user who might not know of the existence of the watch command( or while loop in bash) and they might not know throttling is happening.

RPi 4 has another nice way of being misconfigured by connecting the external drive to a USB 2.0 port (black) instead of USB 3.0 (blue)

The way to check the drive speed:

# hdparm -t /dev/sda
/dev/sda:
Timing buffered disk reads: 344 MB in  3.02 seconds = 114.03 MB/sec

# hdparm -t /dev/mmcblk0
/dev/mmcblk0:
Timing buffered disk reads: 132 MB in  3.04 seconds =  43.46 MB/sec