Hi,
I'm done a 'perf record' on vdso_test_random reduced to vdso test only,
and I get the following function usage profile.
Do you see the same type of percentage on your platforms ?
I would have expected most of the time to be spent in
__arch_chacha20_blocks_nostack() but that's in fact not the case.
# Samples: 61K of event 'task-clock:ppp'
# Event count (approx.): 15463500000
#
# Overhead Command Shared Object Symbol
# ........ ............... ...................
....................................
#
57.74% vdso_test_getra [vdso] [.] __c_kernel_getrandom
22.49% vdso_test_getra [vdso] [.]
__arch_chacha20_blocks_nostack
10.80% vdso_test_getra vdso_test_getrandom [.] test_vdso_getrandom
8.89% vdso_test_getra [vdso] [.] __kernel_getrandom
0.01% vdso_test_getra [kernel.kallsyms] [k]
finish_task_switch.isra.0
Christophe
