Re: [PATCH 2/2] CodeSamples: Switch ARM64 get_timestamp() to use the hardware counter

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On 2022-08-16 08:46, Elad Lahav wrote:
Signed-off-by: Elad Lahav <e2lahav@xxxxxxxxx>

I tested the change on an aarch64 board on both QNX and Linux. The Linux results show quite the change in performance from the clock_gettime() version, which is probably expected.

Before:
root@localhost:~/src/CodeSamples/defer# ./gettimestamp
d3f5e50a7d
d3f5e50af5 120
d3f5e50b6d 120
d3f5e50be5 120
d3f5e50c5d 120
d3f5e50cd5 120
d3f5e50d25 80
d3f5e50d9d 120
d3f5e50e15 120
d3f5e50e8d 120

After:
root@localhost:~/src/CodeSamples/defer# ./gettimestamp
73706dac1
73706dac2 1
73706dac4 2
73706dac5 1
73706dac6 1
73706dac8 2
73706dac9 1
73706dacb 2
73706dacc 1
73706dacd 1

--Elad



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