tmux-kanagawa/scripts/ram_info.sh
Andrew Taylor bb44e5c842 Fix: Avoid potential delay in calc of RAM (darwin)
The system_profiler command used to determine the total memory on darwin
systems performs an "Activation Lock" check. This can produce a delay in
returning total memory. I began experiencing delays of around 10 seconds.

Switching from system_profiler to sysctl to calculate total memory
bypasses the "Activation Lock" check / timeout scenario.

Results of "time" command using system_profiler:
system_profiler SPHardwareDataType  0.17s user 0.23s system 3% cpu 10.165 total
grep -a "Memory:"  0.00s user 0.00s system 0% cpu 10.164 total
awk '{print $2 $3}'  0.00s user 0.00s system 0% cpu 10.163 total

Results of "time" command using sysctl:
sysctl -n hw.memsize  0.00s user 0.00s system 83% cpu 0.004 total
awk '{print $0/1024/1024/1024 " GB"}'  0.00s user 0.00s system 86% cpu 0.004 total
2023-12-15 10:57:07 -05:00

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#!/usr/bin/env bash
# setting the locale, some users have issues with different locales, this forces the correct one
export LC_ALL=en_US.UTF-8
current_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
source $current_dir/utils.sh
get_ratio()
{
case $(uname -s) in
Linux)
usage="$(free -h | awk 'NR==2 {print $3}')"
total="$(free -h | awk 'NR==2 {print $2}')"
formated="${usage}/${total}"
echo "${formated//i/B}"
;;
Darwin)
# Get used memory blocks with vm_stat, multiply by page size to get size in bytes, then convert to MiB
used_mem=$(vm_stat | grep ' active\|wired ' | sed 's/[^0-9]//g' | paste -sd ' ' - | awk -v pagesize=$(pagesize) '{printf "%d\n", ($1+$2) * pagesize / 1048576}')
# System Profiler performs an activation lock check, which can result in
# time outs or a lagged response. (~10 seconds)
# total_mem=$(system_profiler SPHardwareDataType | grep "Memory:" | awk '{print $2 $3}')
total_mem=$(sysctl -n hw.memsize | awk '{print $0/1024/1024/1024 " GB"}')
if ((used_mem < 1024 )); then
echo "${used_mem}MB/$total_mem"
else
memory=$((used_mem/1024))
echo "${memory}GB/$total_mem"
fi
;;
FreeBSD)
# Looked at the code from neofetch
hw_pagesize="$(sysctl -n hw.pagesize)"
mem_inactive="$(($(sysctl -n vm.stats.vm.v_inactive_count) * hw_pagesize))"
mem_unused="$(($(sysctl -n vm.stats.vm.v_free_count) * hw_pagesize))"
mem_cache="$(($(sysctl -n vm.stats.vm.v_cache_count) * hw_pagesize))"
free_mem=$(((mem_inactive + mem_unused + mem_cache) / 1024 / 1024))
total_mem=$(($(sysctl -n hw.physmem) / 1024 / 1024))
used_mem=$((total_mem - free_mem))
echo $used_mem
if ((used_mem < 1024 )); then
echo "${used_mem}MB/$total_mem"
else
memory=$((used_mem/1024))
echo "${memory}GB/$total_mem"
fi
;;
OpenBSD)
# vmstat -s | grep "pages managed" | sed -ne 's/^ *\([0-9]*\).*$/\1/p'
# Looked at the code from neofetch
hw_pagesize="$(pagesize)"
used_mem=$(( (
$(vmstat -s | grep "pages active$" | sed -ne 's/^ *\([0-9]*\).*$/\1/p') +
$(vmstat -s | grep "pages inactive$" | sed -ne 's/^ *\([0-9]*\).*$/\1/p') +
$(vmstat -s | grep "pages wired$" | sed -ne 's/^ *\([0-9]*\).*$/\1/p') +
$(vmstat -s | grep "pages zeroed$" | sed -ne 's/^ *\([0-9]*\).*$/\1/p') +
0) * hw_pagesize / 1024 / 1024 ))
total_mem=$(($(sysctl -n hw.physmem) / 1024 / 1024))
#used_mem=$((total_mem - free_mem))
total_mem=$(($total_mem/1024))
if (( $used_mem < 1024 )); then
echo $used_mem\M\B/$total_mem\G\B
else
memory=$(($used_mem/1024))
echo $memory\G\B/$total_mem\G\B
fi
;;
CYGWIN*|MINGW32*|MSYS*|MINGW*)
# TODO - windows compatability
;;
esac
}
main()
{
ram_label=$(get_tmux_option "@dracula-ram-usage-label" "RAM")
ram_ratio=$(get_ratio)
echo "$ram_label $ram_ratio"
}
#run main driver
main