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 $0/1024/1024/1024 " GB"}' 0.00s user 0.00s system 86% cpu 0.004 total
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@ -19,7 +19,10 @@ get_ratio()
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Darwin)
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# Get used memory blocks with vm_stat, multiply by page size to get size in bytes, then convert to MiB
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used_mem=$(vm_stat | grep ' active\|wired ' | sed 's/[^0-9]//g' | paste -sd ' ' - | awk -v pagesize=$(pagesize) '{printf "%d\n", ($1+$2) * pagesize / 1048576}')
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total_mem=$(system_profiler SPHardwareDataType | grep "Memory:" | awk '{print $2 $3}')
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# System Profiler performs an activation lock check, which can result in
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# time outs or a lagged response. (~10 seconds)
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# total_mem=$(system_profiler SPHardwareDataType | grep "Memory:" | awk '{print $2 $3}')
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total_mem=$(sysctl -n hw.memsize | awk '{print $0/1024/1024/1024 " GB"}')
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if ((used_mem < 1024 )); then
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echo "${used_mem}MB/$total_mem"
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else
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