app/crypto-perf: fix burst size calculation

This patch fixes segmentation fault in pmd_cyclecount_bench_ops
function in case when state->opts->nb_descriptors is not
natural multiple of burst size.
To reproduce run: dpdk-test-crypto-perf with params:
  --ptest pmd-cyclecount --pmd-cyclecount-delay-ms 5 \
  --devtype crypto_qat --optype cipher-then-auth \
  --cipher-algo aes-cbc --cipher-op encrypt \
  --cipher-key-sz 16 --cipher-iv-sz 16 \
  --auth-algo sha2-256-hmac \
  --auth-op generate --auth-key-sz 64 --digest-sz 32 \
  --total-ops 10000 --burst-sz 255 --buffer-sz 1024 --silent

Fixes: 96dfeb609be1 ("app/crypto-perf: add new PMD benchmarking mode")
Cc: stable@dpdk.org
Signed-off-by: Tomasz Jozwiak <tomaszx.jozwiak@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>

diff --git a/app/test-crypto-perf/cperf_test_pmd_cyclecount.c b/app/test-crypto-perf/cperf_test_pmd_cyclecount.c
index 8f76160..c8d16db 100644 (file)
--- a/app/test-crypto-perf/cperf_test_pmd_cyclecount.c
+++ b/app/test-crypto-perf/cperf_test_pmd_cyclecount.c
@@ -145,7 +145,7 @@ pmd_cyclecount_bench_ops(struct pmd_cyclecount_state *state, uint32_t cur_op,
 
        for (cur_iter_op = 0; cur_iter_op < iter_ops_needed;
                        cur_iter_op += test_burst_size) {
-               uint32_t burst_size = RTE_MIN(state->opts->total_ops - cur_op,
+               uint32_t burst_size = RTE_MIN(iter_ops_needed - cur_iter_op,
                                test_burst_size);
                struct rte_crypto_op **ops = &state->ctx->ops[cur_iter_op];