Command to measure TLB misses on LINUX
Question
Could some one direct me to a command to measure TLB misses on LINUX, please? Is it okay to consider minor page faults as TLB misses?
Solution
You can use perf
to do this. Provided your CPU supports it.
Use perf list
to get some idea of the counters available. When I took this list and grepped for TLB (on my Sandy Bridge machine) I got:
rob@tartarus:~$ perf list | grep -i tlb
dTLB-loads [Hardware cache event]
dTLB-load-misses [Hardware cache event]
dTLB-stores [Hardware cache event]
dTLB-store-misses [Hardware cache event]
dTLB-prefetches [Hardware cache event]
dTLB-prefetch-misses [Hardware cache event]
iTLB-loads [Hardware cache event]
iTLB-load-misses [Hardware cache event]
You can then use this particular counter with: perf record -e <event0>,<event1>,..
And then just use perf report
to look at the results.
OTHER TIPS
To see this information for the entire system, you could use the following line. This will record the counters for 1 minute (60 seconds).
perf stat -e dTLB-loads,dTLB-load-misses,iTLB-loads,iTLB-load-misses sleep 60
Licensed under: CC-BY-SA with attribution
Not affiliated with StackOverflow