Runcommand warning if voltage/temperature throttling

[dankcushions]

dumping an idea that has been sat on my list for ages that i'm not sure is worth implementing :)

the coloured symbols that appear when your pi is throttling due to temperature or voltage issues are ambiguous at best, ignored at worst :) it's possible to get make system enquiries on any throttling happening:

$ vcgencmd get_throttled
throttled=0x50005

the bits in this number represent:

0: under-voltage
1: arm frequency capped
2: currently throttled 
16: under-voltage has occurred
17: arm frequency capped has occurred
18: throttling has occurred

for more details see: https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=147781&start=50#p972790

i thought: we could add a check in the runcommand to see if there's any throttling at run-time, and give a proper warning. this won't catch every occurrence, as sometimes the warnings only come when the system is under heavier load (ie, midway through running a game), but maybe it's useful in some situations? has anyone got any experience with undervoltage? is the symbol there more-or-less constantly?

btw, this might become redundant if the squares get replaced with something more obvious. see https://github.com/raspberrypi/firmware/issues/367

[RetroResolution]

@dankcushions sounds like it could be useful - always glad to learn a new vcgencmd option too

[Charlie_G]

I know this is an old thread, but I'm replying here because it's the first "open" result on a related Google search.
I wrote a quick script that I'd like to share for quickly parsing the above into a user-readable format

Sample output:

Status: 0x50005
Undervolted:
   Now: YES
   Run: YES
Throttled:
   Now: YES
   Run: YES
Frequency Capped:
   Now: NO
   Run: NO

Script:

#!/bin/bash

#Flag Bits
UNDERVOLTED=0x1
CAPPED=0x2
THROTTLED=0x4
HAS_UNDERVOLTED=0x10000
HAS_CAPPED=0x20000
HAS_THROTTLED=0x40000

#Text Colors
GREEN=`tput setaf 2`
RED=`tput setaf 1`
NC=`tput sgr0`

#Output Strings
GOOD="${GREEN}NO${NC}"
BAD="${RED}YES${NC}"

#Get Status, extract hex
STATUS=$(vcgencmd get_throttled)
STATUS=${STATUS#*=}

echo -n "Status: "
(($STATUS!=0)) && echo "${RED}${STATUS}${NC}" || echo "${GREEN}${STATUS}${NC}"

echo "Undervolted:"
echo -n "   Now: "
((($STATUS&UNDERVOLTED)!=0)) && echo "${BAD}" || echo "${GOOD}"
echo -n "   Run: "
((($STATUS&HAS_UNDERVOLTED)!=0)) && echo "${BAD}" || echo "${GOOD}"

echo "Throttled:"
echo -n "   Now: "
((($STATUS&THROTTLED)!=0)) && echo "${BAD}" || echo "${GOOD}"
echo -n "   Run: "
((($STATUS&HAS_THROTTLED)!=0)) && echo "${BAD}" || echo "${GOOD}"

echo "Frequency Capped:"
echo -n "   Now: "
((($STATUS&CAPPED)!=0)) && echo "${BAD}" || echo "${GOOD}"
echo -n "   Run: "
((($STATUS&HAS_CAPPED)!=0)) && echo "${BAD}" || echo "${GOOD}"