> -----Original Message-----
> From: dev [mailto:dev-boun...@dpdk.org] On Behalf Of David Christensen
> Sent: Monday, May 6, 2019 8:24 PM
> To: dev@dpdk.org
> Cc: David Christensen <d...@linux.vnet.ibm.com>
> Subject: [dpdk-dev] [PATCH v2 3/4] test: change memory barrier variables to
> uint64_t
>
> Memory barrier failures can be intermittent. Increase the size of the
> sum/val/iteration variables to allow tests that can run for days so that
> sporadic errors can be identified.
>
> Signed-off-by: David Christensen <d...@linux.vnet.ibm.com>
> ---
> v2:
> * Removed change to ITER_MAX
>
> app/test/test_barrier.c | 23 ++++++++++++-----------
> 1 file changed, 12 insertions(+), 11 deletions(-)
>
> diff --git a/app/test/test_barrier.c b/app/test/test_barrier.c
> index ae37b1e..a022708 100644
> --- a/app/test/test_barrier.c
> +++ b/app/test/test_barrier.c
> @@ -55,8 +55,8 @@ struct plock {
> */
> struct plock_test {
> struct plock lock;
> - uint32_t val;
> - uint32_t iter;
> + uint64_t val;
> + uint64_t iter;
> };
>
> /*
> @@ -65,8 +65,8 @@ struct plock_test {
> */
> struct lcore_plock_test {
> struct plock_test *pt[2]; /* shared, lock-protected data */
> - uint32_t sum[2]; /* local copy of the shared data */
> - uint32_t iter; /* number of iterations to perfom */
> + uint64_t sum[2]; /* local copy of the shared data */
> + uint64_t iter; /* number of iterations to perfom */
> uint32_t lc; /* given lcore id */
> };
Not sure why you think this is needed - right now
both iter and sum wouldn't be bigger than 32bit
(max value that sum can reach: 2^27).
>
> @@ -130,7 +130,8 @@ struct lcore_plock_test {
> plock_test1_lcore(void *data)
> {
> uint64_t tm;
> - uint32_t i, lc, ln, n;
> + uint32_t lc, ln;
> + uint64_t i, n;
> struct lcore_plock_test *lpt;
>
> lpt = data;
> @@ -166,9 +167,9 @@ struct lcore_plock_test {
>
> tm = rte_get_timer_cycles() - tm;
>
> - printf("%s(%u): %u iterations finished, in %" PRIu64
> + printf("%s(%u): %lu iterations finished, in %" PRIu64
> " cycles, %#Lf cycles/iteration, "
> - "local sum={%u, %u}\n",
> + "local sum={%lu, %lu}\n",
> __func__, lc, i, tm, (long double)tm / i,
> lpt->sum[0], lpt->sum[1]);
> return 0;
> @@ -184,11 +185,11 @@ struct lcore_plock_test {
> * and local data are the same.
> */
> static int
> -plock_test(uint32_t iter, enum plock_use_type utype)
> +plock_test(uint64_t iter, enum plock_use_type utype)
> {
> int32_t rc;
> uint32_t i, lc, n;
> - uint32_t *sum;
> + uint64_t *sum;
> struct plock_test *pt;
> struct lcore_plock_test *lpt;
>
> @@ -199,7 +200,7 @@ struct lcore_plock_test {
> lpt = calloc(n, sizeof(*lpt));
> sum = calloc(n + 1, sizeof(*sum));
>
> - printf("%s(iter=%u, utype=%u) started on %u lcores\n",
> + printf("%s(iter=%lu, utype=%u) started on %u lcores\n",
> __func__, iter, utype, n);
>
> if (pt == NULL || lpt == NULL || sum == NULL) {
> @@ -247,7 +248,7 @@ struct lcore_plock_test {
>
> rc = 0;
> for (i = 0; i != n; i++) {
> - printf("%s: sum[%u]=%u, pt[%u].val=%u, pt[%u].iter=%u;\n",
> + printf("%s: sum[%u]=%lu, pt[%u].val=%lu, pt[%u].iter=%lu;\n",
Here and in other places, you need to use PRIu64 for 64 bit values.
> __func__, i, sum[i], i, pt[i].val, i, pt[i].iter);
>
> /* race condition occurred, lock doesn't work properly */
> --
> 1.8.3.1
