Re: [dpdk-dev] [PATCH v2 4/6] app/test: add test case for LPM RCU integration

[Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>]

Adding Paul for feedback

> -----Original Message-----
> From: Ruifeng Wang <ruifeng.wang@arm.com>
> Sent: Friday, September 6, 2019 4:46 AM
> To: bruce.richardson@intel.com; vladimir.medvedkin@intel.com;
> olivier.matz@6wind.com
> Cc: dev@dpdk.org; stephen@networkplumber.org;
> konstantin.ananyev@intel.com; Gavin Hu (Arm Technology China)
> <Gavin.Hu@arm.com>; Honnappa Nagarahalli
> <Honnappa.Nagarahalli@arm.com>; Dharmik Thakkar
> <Dharmik.Thakkar@arm.com>; nd <nd@arm.com>; Ruifeng Wang (Arm
> Technology China) <Ruifeng.Wang@arm.com>
> Subject: [PATCH v2 4/6] app/test: add test case for LPM RCU integration
> 
> Add positive and negative tests for API rte_lpm_rcu_qsbr_add.
> Also test LPM library behavior when RCU QSBR is enabled.
> 
> Signed-off-by: Ruifeng Wang <ruifeng.wang@arm.com>
> Reviewed-by: Gavin Hu <gavin.hu@arm.com>
> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
> ---
>  app/test/test_lpm.c | 153 +++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 152 insertions(+), 1 deletion(-)
> 
> diff --git a/app/test/test_lpm.c b/app/test/test_lpm.c index
> e969fe051..cfd372395 100644
> --- a/app/test/test_lpm.c
> +++ b/app/test/test_lpm.c
> @@ -8,6 +8,7 @@
> 
>  #include <rte_ip.h>
>  #include <rte_lpm.h>
> +#include <rte_malloc.h>
> 
>  #include "test.h"
>  #include "test_xmmt_ops.h"
> @@ -40,6 +41,8 @@ static int32_t test15(void);  static int32_t test16(void);
> static int32_t test17(void);  static int32_t test18(void);
> +static int32_t test19(void);
> +static int32_t test20(void);
> 
>  rte_lpm_test tests[] = {
>  /* Test Cases */
> @@ -61,7 +64,9 @@ rte_lpm_test tests[] = {
>  	test15,
>  	test16,
>  	test17,
> -	test18
> +	test18,
> +	test19,
> +	test20
>  };
> 
>  #define NUM_LPM_TESTS (sizeof(tests)/sizeof(tests[0])) @@ -1266,6
> +1271,152 @@ test18(void)
>  	return PASS;
>  }
> 
> +/*
> + * rte_lpm_rcu_qsbr_add positive and negative tests.
> + *  - Add RCU QSBR variable to LPM
> + *  - Add another RCU QSBR variable to LPM
> + *  - Check LPM attached RCU QSBR variable and FIFO queue  */ int32_t
> +test19(void)
> +{
> +	struct rte_lpm *lpm = NULL;
> +	struct rte_lpm_config config;
> +	size_t sz;
> +	struct rte_rcu_qsbr *qsv;
> +	struct rte_rcu_qsbr *qsv2;
> +	int32_t status;
> +
> +	config.max_rules = MAX_RULES;
> +	config.number_tbl8s = NUMBER_TBL8S;
> +	config.flags = 0;
> +
> +	lpm = rte_lpm_create(__func__, SOCKET_ID_ANY, &config);
> +	TEST_LPM_ASSERT(lpm != NULL);
> +
> +	/* Create RCU QSBR variable */
> +	sz = rte_rcu_qsbr_get_memsize(RTE_MAX_LCORE);
> +	qsv = (struct rte_rcu_qsbr *)rte_zmalloc_socket(NULL, sz,
> +					RTE_CACHE_LINE_SIZE,
> SOCKET_ID_ANY);
> +	TEST_LPM_ASSERT(qsv != NULL);
> +
> +	status = rte_rcu_qsbr_init(qsv, RTE_MAX_LCORE);
> +	TEST_LPM_ASSERT(status == 0);
> +
> +	/* Attach RCU QSBR to LPM table */
> +	status = rte_lpm_rcu_qsbr_add(lpm, qsv);
> +	TEST_LPM_ASSERT(status == 0);
> +
> +	/* Create and attach another RCU QSBR to LPM table */
> +	qsv2 = (struct rte_rcu_qsbr *)rte_zmalloc_socket(NULL, sz,
> +					RTE_CACHE_LINE_SIZE,
> SOCKET_ID_ANY);
> +	TEST_LPM_ASSERT(qsv2 != NULL);
> +
> +	status = rte_lpm_rcu_qsbr_add(lpm, qsv2);
> +	TEST_LPM_ASSERT(status != 0);
> +
> +	TEST_LPM_ASSERT(lpm->qsv == qsv);
> +	TEST_LPM_ASSERT(lpm->qs_fifo != NULL);
> +
> +	rte_lpm_free(lpm);
> +	rte_free(qsv);
> +	rte_free(qsv2);
> +
> +	return PASS;
> +}
> +
> +/*
> + * rte_lpm_rcu_qsbr_add functional test.
> + *  - Create LPM which supports 1 tbl8 group at max
> + *  - Add RCU QSBR variable to LPM
> + *  - Add a rule with depth=28 (> 24)
> + *  - Register a reader thread (not a real thread)
> + *  - Reader lookup existing rule
> + *  - Writer delete the rule
> + *  - Reader lookup the rule
> + *  - Writer re-add the rule (no available tbl8 group)
> + *  - Reader report quiescent state and unregister
> + *  - Writer re-add the rule
> + *  - Reader lookup the rule
> + */
> +int32_t
> +test20(void)
> +{
> +	struct rte_lpm *lpm = NULL;
> +	struct rte_lpm_config config;
> +	size_t sz;
> +	struct rte_rcu_qsbr *qsv;
> +	int32_t status;
> +	uint32_t ip, next_hop, next_hop_return;
> +	uint8_t depth;
> +
> +	config.max_rules = MAX_RULES;
> +	config.number_tbl8s = 1;
> +	config.flags = 0;
> +
> +	lpm = rte_lpm_create(__func__, SOCKET_ID_ANY, &config);
> +	TEST_LPM_ASSERT(lpm != NULL);
> +
> +	/* Create RCU QSBR variable */
> +	sz = rte_rcu_qsbr_get_memsize(1);
> +	qsv = (struct rte_rcu_qsbr *)rte_zmalloc_socket(NULL, sz,
> +					RTE_CACHE_LINE_SIZE,
> SOCKET_ID_ANY);
> +	TEST_LPM_ASSERT(qsv != NULL);
> +
> +	status = rte_rcu_qsbr_init(qsv, 1);
> +	TEST_LPM_ASSERT(status == 0);
> +
> +	/* Attach RCU QSBR to LPM table */
> +	status = rte_lpm_rcu_qsbr_add(lpm, qsv);
> +	TEST_LPM_ASSERT(status == 0);
> +
> +	ip = RTE_IPV4(192, 18, 100, 100);
> +	depth = 28;
> +	next_hop = 1;
> +	status = rte_lpm_add(lpm, ip, depth, next_hop);
> +	TEST_LPM_ASSERT(status == 0);
> +	TEST_LPM_ASSERT(lpm->tbl24[ip>>8].valid_group);
> +
> +	/* Register pseudo reader */
> +	status = rte_rcu_qsbr_thread_register(qsv, 0);
> +	TEST_LPM_ASSERT(status == 0);
> +	rte_rcu_qsbr_thread_online(qsv, 0);
> +
> +	status = rte_lpm_lookup(lpm, ip, &next_hop_return);
> +	TEST_LPM_ASSERT(status == 0);
> +	TEST_LPM_ASSERT(next_hop_return == next_hop);
> +
> +	/* Writer update */
> +	status = rte_lpm_delete(lpm, ip, depth);
> +	TEST_LPM_ASSERT(status == 0);
> +	TEST_LPM_ASSERT(!lpm->tbl24[ip>>8].valid);
> +
> +	status = rte_lpm_lookup(lpm, ip, &next_hop_return);
> +	TEST_LPM_ASSERT(status != 0);
> +
> +	status = rte_lpm_add(lpm, ip, depth, next_hop);
> +	TEST_LPM_ASSERT(status != 0);
> +
> +	/* Reader quiescent */
> +	rte_rcu_qsbr_quiescent(qsv, 0);
> +
> +	status = rte_lpm_add(lpm, ip, depth, next_hop);
> +	TEST_LPM_ASSERT(status == 0);
> +
> +	rte_rcu_qsbr_thread_offline(qsv, 0);
> +	status = rte_rcu_qsbr_thread_unregister(qsv, 0);
> +	TEST_LPM_ASSERT(status == 0);
> +
> +	status = rte_lpm_lookup(lpm, ip, &next_hop_return);
> +	TEST_LPM_ASSERT(status == 0);
> +	TEST_LPM_ASSERT(next_hop_return == next_hop);
> +
> +	rte_lpm_free(lpm);
> +	rte_free(qsv);
> +
> +	return PASS;
> +}
> +
>  /*
>   * Do all unit tests.
>   */
> --
> 2.17.1