On Thu, Sep 12, 2024 at 2:34 PM Mattias Rönnblom
<mattias.ronnb...@ericsson.com> wrote:
>
> Add basic micro benchmark for lcore variables, in an attempt to assure
> that the overhead isn't significantly greater than alternative
> approaches, in scenarios where the benefits aren't expected to show up
> (i.e., when plenty of cache is available compared to the working set
> size of the per-lcore data).
>
> Signed-off-by: Mattias Rönnblom <mattias.ronnb...@ericsson.com>
> ---
> app/test/meson.build | 1 +
> app/test/test_lcore_var_perf.c | 160 +++++++++++++++++++++++++++++++++
> 2 files changed, 161 insertions(+)
> create mode 100644 app/test/test_lcore_var_perf.c
> +static double
> +benchmark_access_method(void (*init_fun)(void), void (*update_fun)(void))
> +{
> + uint64_t i;
> + uint64_t start;
> + uint64_t end;
> + double latency;
> +
> + init_fun();
> +
> + start = rte_get_timer_cycles();
> +
> + for (i = 0; i < ITERATIONS; i++)
> + update_fun();
> +
> + end = rte_get_timer_cycles();
Use precise variant. rte_rdtsc_precise() or so to be accurate
