> > > Add test cases to test rte_ring_xxx_elem APIs for single element
> > > enqueue/dequeue test cases.
> > >
> > > Signed-off-by: Honnappa Nagarahalli <honnappa.nagaraha...@arm.com>
> > > Reviewed-by: Gavin Hu <gavin...@arm.com>
> > > ---
> > > app/test/test_ring_perf.c | 100
> > > ++++++++++++++++++++++++++++++--------
> > > 1 file changed, 80 insertions(+), 20 deletions(-)
> > >
> > > diff --git a/app/test/test_ring_perf.c b/app/test/test_ring_perf.c
> > > index 6c2aca483..5829718c1 100644
> > > --- a/app/test/test_ring_perf.c
> > > +++ b/app/test/test_ring_perf.c
> > > @@ -13,6 +13,7 @@
> > > #include <string.h>
> > >
> > > #include "test.h"
> > > +#include "test_ring.h"
> > >
> > > /*
> > > * Ring
> > > @@ -41,6 +42,35 @@ struct lcore_pair {
> > >
> > > static volatile unsigned lcore_count = 0;
> > >
> > > +static void
> > > +test_ring_print_test_string(unsigned int api_type, int esize,
> > > + unsigned int bsz, double value)
> > > +{
> > > + if (esize == -1)
> > > + printf("legacy APIs");
> > > + else
> > > + printf("elem APIs: element size %dB", esize);
> > > +
> > > + if (api_type == TEST_RING_IGNORE_API_TYPE)
> > > + return;
> > > +
> > > + if ((api_type & TEST_RING_N) == TEST_RING_N)
> > > + printf(": default enqueue/dequeue: ");
> > > + else if ((api_type & TEST_RING_S) == TEST_RING_S)
> > > + printf(": SP/SC: ");
> > > + else if ((api_type & TEST_RING_M) == TEST_RING_M)
> > > + printf(": MP/MC: ");
> > > +
> > > + if ((api_type & TEST_RING_SL) == TEST_RING_SL)
> > > + printf("single: ");
> > > + else if ((api_type & TEST_RING_BL) == TEST_RING_BL)
> > > + printf("bulk (size: %u): ", bsz);
> > > + else if ((api_type & TEST_RING_BR) == TEST_RING_BR)
> > > + printf("burst (size: %u): ", bsz);
> > > +
> > > + printf("%.2F\n", value);
> > > +}
> > > +
> > > /**** Functions to analyse our core mask to get cores for different
> > > tests ***/
> > >
> > > static int
> > > @@ -335,32 +365,35 @@ run_on_all_cores(struct rte_ring *r)
> > > * Test function that determines how long an enqueue + dequeue of a
> > single item
> > > * takes on a single lcore. Result is for comparison with the bulk
> > > enq+deq.
> > > */
> > > -static void
> > > -test_single_enqueue_dequeue(struct rte_ring *r)
> > > +static int
> > > +test_single_enqueue_dequeue(struct rte_ring *r, const int esize,
> > > + const unsigned int api_type)
> > > {
> > > - const unsigned iter_shift = 24;
> > > - const unsigned iterations = 1<<iter_shift;
> > > - unsigned i = 0;
> > > + int ret;
> > > + const unsigned int iter_shift = 24;
> > > + const unsigned int iterations = 1 << iter_shift;
> > > + unsigned int i = 0;
> > > void *burst = NULL;
> > >
> > > - const uint64_t sc_start = rte_rdtsc();
> > > - for (i = 0; i < iterations; i++) {
> > > - rte_ring_sp_enqueue(r, burst);
> > > - rte_ring_sc_dequeue(r, &burst);
> > > - }
> > > - const uint64_t sc_end = rte_rdtsc();
> > > + (void)ret;
> >
> > Here, and in few other places, looks redundant.
> The compiler throws an error since 'ret' is assigned a value, but it is not
> used.
Probably one way to change TEST_RING_ENQUEUE() from macro
to inline-function returning ret.
>
> >
> > > + /* alloc dummy object pointers */
> > > + burst = test_ring_calloc(1, esize);
> > > + if (burst == NULL)
> > > + return -1;
> > >
> > > - const uint64_t mc_start = rte_rdtsc();
> > > + const uint64_t start = rte_rdtsc();
> > > for (i = 0; i < iterations; i++) {
> > > - rte_ring_mp_enqueue(r, burst);
> > > - rte_ring_mc_dequeue(r, &burst);
> > > + TEST_RING_ENQUEUE(r, burst, esize, 1, ret, api_type);
> > > + TEST_RING_DEQUEUE(r, burst, esize, 1, ret, api_type);
> > > }
> > > - const uint64_t mc_end = rte_rdtsc();
> > > + const uint64_t end = rte_rdtsc();
> > > +
> > > + test_ring_print_test_string(api_type, esize, 1,
> > > + ((double)(end - start)) / iterations);
> > > +
> > > + rte_free(burst);
> > >
> > > - printf("SP/SC single enq/dequeue: %.2F\n",
> > > - ((double)(sc_end-sc_start)) / iterations);
> > > - printf("MP/MC single enq/dequeue: %.2F\n",
> > > - ((double)(mc_end-mc_start)) / iterations);
> > > + return 0;
> > > }
> > >
> > > /*
