On 2024-09-12 15:09, Jerin Jacob wrote:
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
With 1e7 iterations, do you need rte_rdtsc_precise()? I suspect not.
