Created
April 12, 2021 03:53
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Dump Intel CPU cache architecture
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| #!/bin/bash | |
| unshared () { | |
| grep '^[0-9]\+$' "$1" > /dev/null | |
| } | |
| for cpu in $(ls -d /sys/devices/system/cpu/cpu[0-9]* | sort -t u -k 3 -n); do | |
| echo "${cpu##*/}: [Package #$(cat $cpu/topology/physical_package_id), Core #$(cat $cpu/topology/core_id)]" | |
| if ! unshared $cpu/topology/core_siblings_list; then | |
| echo " same package as $(cat $cpu/topology/core_siblings_list)" | |
| fi | |
| if ! unshared $cpu/topology/thread_siblings_list; then | |
| echo " same core as $(cat $cpu/topology/thread_siblings_list)" | |
| fi | |
| for cache in $cpu/cache/index*; do | |
| printf " %-15s " "L$(cat $cache/level) $(cat $cache/type):" | |
| echo "$(cat $cache/size) $(cat $cache/ways_of_associativity)-way with $(cat $cache/coherency_line_size) byte lines" | |
| if ! unshared $cache/shared_cpu_list; then | |
| printf " %-15s [%s]\n" "" "shared with $(cat $cache/shared_cpu_list)" | |
| fi | |
| done | |
| echo | |
| done |
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