[dpdk-dev] [PATCH 4/4] test/lpm: improve coverage on tbl8
Medvedkin, Vladimir
vladimir.medvedkin at intel.com
Wed Jan 13 19:51:43 CET 2021
Hi Ruifeng,
Please find comment inlined. Apart from that looks good.
On 08/01/2021 08:21, Ruifeng Wang wrote:
> Existing test cases create 256 tbl8 groups for testing. The number covers
> only 8 bit next_hop/group field. Since the next_hop/group field had been
> extended to 24-bits, creating more than 256 groups in tests can improve
> the coverage.
>
> Coverage was not expanded to reach the max supported group number, because
> it would take too much time to run for this fast-test.
>
> Signed-off-by: Ruifeng Wang <ruifeng.wang at arm.com>
> ---
> app/test/test_lpm.c | 22 ++++++++++++++--------
> 1 file changed, 14 insertions(+), 8 deletions(-)
>
> diff --git a/app/test/test_lpm.c b/app/test/test_lpm.c
> index 258b2f67c..ee6c4280b 100644
> --- a/app/test/test_lpm.c
> +++ b/app/test/test_lpm.c
> @@ -993,7 +993,7 @@ test13(void)
> }
>
> /*
> - * Fore TBL8 extension exhaustion. Add 256 rules that require a tbl8 extension.
> + * For TBL8 extension exhaustion. Add 512 rules that require a tbl8 extension.
> * No more tbl8 extensions will be allowed. Now add one more rule that required
> * a tbl8 extension and get fail.
> * */
> @@ -1008,28 +1008,34 @@ test14(void)
> struct rte_lpm_config config;
>
> config.max_rules = 256 * 32;
> - config.number_tbl8s = NUMBER_TBL8S;
> + config.number_tbl8s = 512;
> config.flags = 0;
> - uint32_t ip, next_hop_add, next_hop_return;
> + uint32_t ip, next_hop_base, next_hop_return;
> uint8_t depth;
> int32_t status = 0;
> + xmm_t ipx4;
> + uint32_t hop[4];
>
> /* Add enough space for 256 rules for every depth */
> lpm = rte_lpm_create(__func__, SOCKET_ID_ANY, &config);
> TEST_LPM_ASSERT(lpm != NULL);
>
> depth = 32;
> - next_hop_add = 100;
> + next_hop_base = 100;
> ip = RTE_IPV4(0, 0, 0, 0);
>
> /* Add 256 rules that require a tbl8 extension */
> - for (; ip <= RTE_IPV4(0, 0, 255, 0); ip += 256) {
> - status = rte_lpm_add(lpm, ip, depth, next_hop_add);
> + for (; ip <= RTE_IPV4(0, 1, 255, 0); ip += 256) {
> + status = rte_lpm_add(lpm, ip, depth, next_hop_base + ip);
> TEST_LPM_ASSERT(status == 0);
>
> status = rte_lpm_lookup(lpm, ip, &next_hop_return);
> TEST_LPM_ASSERT((status == 0) &&
> - (next_hop_return == next_hop_add));
> + (next_hop_return == next_hop_base + ip));
> +
> + ipx4 = vect_set_epi32(ip + 3, ip + 2, ip + 1, ip);
> + rte_lpm_lookupx4(lpm, ipx4, hop, UINT32_MAX);
> + TEST_LPM_ASSERT(hop[0] == next_hop_base + ip);
I think it is worth to check all 4 returned next hops here.
> }
>
> /* All tbl8 extensions have been used above. Try to add one more and
> @@ -1037,7 +1043,7 @@ test14(void)
> ip = RTE_IPV4(1, 0, 0, 0);
> depth = 32;
>
> - status = rte_lpm_add(lpm, ip, depth, next_hop_add);
> + status = rte_lpm_add(lpm, ip, depth, next_hop_base + ip);
> TEST_LPM_ASSERT(status < 0);
>
> rte_lpm_free(lpm);
>
--
Regards,
Vladimir
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