* [dpdk-stable] [PATCH v4 3/3] hash: flush the rings instead of dequeuing one by one [not found] <1546390533-53868-1-git-send-email-gavin.hu@arm.com> @ 2019-01-02 0:55 ` Gavin Hu [not found] ` <1546483094-29712-1-git-send-email-gavin.hu@arm.com> 1 sibling, 0 replies; 2+ messages in thread From: Gavin Hu @ 2019-01-02 0:55 UTC (permalink / raw) To: dev Cc: thomas, jerinj, hemant.agrawal, bruce.richardson, chaozhu, Honnappa.Nagarahalli, nd, olivier.matz, stable Within rte_hash_reset, calling a while loop to dequeue one by one from the ring, while not using them at all, is wasting cycles, The patch just flush the ring by resetting the indices can save cpu cycles. Fixes: b26473ff8f4a ("hash: add reset function") Fixes: 75706568a7eb ("hash: add extendable bucket feature") Cc: stable@dpdk.org Signed-off-by: Gavin Hu <gavin.hu@arm.com> Reviewed-by: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com> --- lib/librte_hash/Makefile | 2 +- lib/librte_hash/meson.build | 3 +++ lib/librte_hash/rte_cuckoo_hash.c | 11 ++++------- 3 files changed, 8 insertions(+), 8 deletions(-) diff --git a/lib/librte_hash/Makefile b/lib/librte_hash/Makefile index c8c435d..5669d83 100644 --- a/lib/librte_hash/Makefile +++ b/lib/librte_hash/Makefile @@ -6,7 +6,7 @@ include $(RTE_SDK)/mk/rte.vars.mk # library name LIB = librte_hash.a -CFLAGS += -O3 +CFLAGS += -O3 -DALLOW_EXPERIMENTAL_API CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR) LDLIBS += -lrte_eal -lrte_ring diff --git a/lib/librte_hash/meson.build b/lib/librte_hash/meson.build index efc06ed..ebf70de 100644 --- a/lib/librte_hash/meson.build +++ b/lib/librte_hash/meson.build @@ -14,3 +14,6 @@ headers = files('rte_cmp_arm64.h', sources = files('rte_cuckoo_hash.c', 'rte_fbk_hash.c') deps += ['ring'] + +# rte ring reset is not yet part of stable API +allow_experimental_apis = true diff --git a/lib/librte_hash/rte_cuckoo_hash.c b/lib/librte_hash/rte_cuckoo_hash.c index c01489b..4b08049 100644 --- a/lib/librte_hash/rte_cuckoo_hash.c +++ b/lib/librte_hash/rte_cuckoo_hash.c @@ -559,7 +559,6 @@ __hash_rw_reader_unlock(const struct rte_hash *h) void rte_hash_reset(struct rte_hash *h) { - void *ptr; uint32_t tot_ring_cnt, i; if (h == NULL) @@ -570,16 +569,14 @@ rte_hash_reset(struct rte_hash *h) memset(h->key_store, 0, h->key_entry_size * (h->entries + 1)); *h->tbl_chng_cnt = 0; - /* clear the free ring */ - while (rte_ring_dequeue(h->free_slots, &ptr) == 0) - continue; + /* reset the free ring */ + rte_ring_reset(h->free_slots); - /* clear free extendable bucket ring and memory */ + /* flush free extendable bucket ring and memory */ if (h->ext_table_support) { memset(h->buckets_ext, 0, h->num_buckets * sizeof(struct rte_hash_bucket)); - while (rte_ring_dequeue(h->free_ext_bkts, &ptr) == 0) - continue; + rte_ring_reset(h->free_ext_bkts); } /* Repopulate the free slots ring. Entry zero is reserved for key misses */ -- 2.7.4 ^ permalink raw reply [flat|nested] 2+ messages in thread
[parent not found: <1546483094-29712-1-git-send-email-gavin.hu@arm.com>]
* [dpdk-stable] [PATCH v5 3/3] hash: flush the rings instead of dequeuing one by one [not found] ` <1546483094-29712-1-git-send-email-gavin.hu@arm.com> @ 2019-01-03 2:38 ` gavin hu 0 siblings, 0 replies; 2+ messages in thread From: gavin hu @ 2019-01-03 2:38 UTC (permalink / raw) To: dev Cc: nd, thomas, jerinj, hemant.agrawal, Honnappa.Nagarahalli, gavin.hu, olivier.matz, bruce.richardson, ferruh.yigit, stable From: Gavin Hu <gavin.hu@arm.com> Within rte_hash_reset, calling a while loop to dequeue one by one from the ring, while not using them at all, is wasting cycles, The patch just flush the ring by resetting the indices can save cpu cycles. Fixes: b26473ff8f4a ("hash: add reset function") Fixes: 75706568a7eb ("hash: add extendable bucket feature") Cc: stable@dpdk.org Signed-off-by: gavin hu <gavin.hu@arm.com> Reviewed-by: honnappa nagarahalli <honnappa.nagarahalli@arm.com> --- lib/librte_hash/Makefile | 2 +- lib/librte_hash/meson.build | 3 +++ lib/librte_hash/rte_cuckoo_hash.c | 11 ++++------- 3 files changed, 8 insertions(+), 8 deletions(-) diff --git a/lib/librte_hash/Makefile b/lib/librte_hash/Makefile index c8c435d..5669d83 100644 --- a/lib/librte_hash/Makefile +++ b/lib/librte_hash/Makefile @@ -6,7 +6,7 @@ include $(RTE_SDK)/mk/rte.vars.mk # library name LIB = librte_hash.a -CFLAGS += -O3 +CFLAGS += -O3 -DALLOW_EXPERIMENTAL_API CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR) LDLIBS += -lrte_eal -lrte_ring diff --git a/lib/librte_hash/meson.build b/lib/librte_hash/meson.build index efc06ed..ebf70de 100644 --- a/lib/librte_hash/meson.build +++ b/lib/librte_hash/meson.build @@ -14,3 +14,6 @@ headers = files('rte_cmp_arm64.h', sources = files('rte_cuckoo_hash.c', 'rte_fbk_hash.c') deps += ['ring'] + +# rte ring reset is not yet part of stable API +allow_experimental_apis = true diff --git a/lib/librte_hash/rte_cuckoo_hash.c b/lib/librte_hash/rte_cuckoo_hash.c index c01489b..4b08049 100644 --- a/lib/librte_hash/rte_cuckoo_hash.c +++ b/lib/librte_hash/rte_cuckoo_hash.c @@ -559,7 +559,6 @@ __hash_rw_reader_unlock(const struct rte_hash *h) void rte_hash_reset(struct rte_hash *h) { - void *ptr; uint32_t tot_ring_cnt, i; if (h == NULL) @@ -570,16 +569,14 @@ rte_hash_reset(struct rte_hash *h) memset(h->key_store, 0, h->key_entry_size * (h->entries + 1)); *h->tbl_chng_cnt = 0; - /* clear the free ring */ - while (rte_ring_dequeue(h->free_slots, &ptr) == 0) - continue; + /* reset the free ring */ + rte_ring_reset(h->free_slots); - /* clear free extendable bucket ring and memory */ + /* flush free extendable bucket ring and memory */ if (h->ext_table_support) { memset(h->buckets_ext, 0, h->num_buckets * sizeof(struct rte_hash_bucket)); - while (rte_ring_dequeue(h->free_ext_bkts, &ptr) == 0) - continue; + rte_ring_reset(h->free_ext_bkts); } /* Repopulate the free slots ring. Entry zero is reserved for key misses */ -- 2.7.4 ^ permalink raw reply [flat|nested] 2+ messages in thread
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[not found] <1546390533-53868-1-git-send-email-gavin.hu@arm.com>
2019-01-02 0:55 ` [dpdk-stable] [PATCH v4 3/3] hash: flush the rings instead of dequeuing one by one Gavin Hu
[not found] ` <1546483094-29712-1-git-send-email-gavin.hu@arm.com>
2019-01-03 2:38 ` [dpdk-stable] [PATCH v5 " gavin hu
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