From: Bruce Richardson <bruce.richardson@intel.com>
To: olivier.matz@6wind.com
Cc: thomas.monjalon@6wind.com, keith.wiles@intel.com,
konstantin.ananyev@intel.com, stephen@networkplumber.org,
dev@dpdk.org, Bruce Richardson <bruce.richardson@intel.com>
Subject: [dpdk-dev] [PATCH RFCv3 17/19] ring: allow macros to work with any type of object
Date: Tue, 7 Feb 2017 14:12:55 +0000 [thread overview]
Message-ID: <1486476777-24768-18-git-send-email-bruce.richardson@intel.com> (raw)
In-Reply-To: <20170125121456.GA24344@bricha3-MOBL3.ger.corp.intel.com>
Modify the enqueue and dequeue macros to support copying any type of
object by passing in the exact object type. We no longer need a
placeholder element array in the ring structure, since the macros just
take the address of the end of the structure, so remove it, leaving
the rte_ring structure as a ring header only.
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
lib/librte_ring/rte_ring.h | 68 ++++++++++++++++++++++++----------------------
1 file changed, 36 insertions(+), 32 deletions(-)
diff --git a/lib/librte_ring/rte_ring.h b/lib/librte_ring/rte_ring.h
index 4a58857..d708c90 100644
--- a/lib/librte_ring/rte_ring.h
+++ b/lib/librte_ring/rte_ring.h
@@ -154,11 +154,7 @@ struct rte_ring {
/** Ring consumer status. */
struct rte_ring_ht_ptr cons __rte_aligned(RTE_CACHE_LINE_SIZE * 2);
-
- void *ring[] __rte_cache_aligned; /**< Memory space of ring starts here.
- * not volatile so need to be careful
- * about compiler re-ordering */
-};
+} __rte_cache_aligned;
#define RING_F_SP_ENQ 0x0001 /**< The default enqueue is "single-producer". */
#define RING_F_SC_DEQ 0x0002 /**< The default dequeue is "single-consumer". */
@@ -286,54 +282,62 @@ void rte_ring_dump(FILE *f, const struct rte_ring *r);
/* the actual enqueue of pointers on the ring.
* Placed here since identical code needed in both
* single and multi producer enqueue functions */
-#define ENQUEUE_PTRS() do { \
+#define ENQUEUE_PTRS(r, obj_table, n, prod_head, obj_type) do { \
unsigned int i; \
- const uint32_t size = r->size; \
- uint32_t idx = prod_head & r->mask; \
+ const uint32_t size = (r)->size; \
+ uint32_t idx = prod_head & (r)->mask; \
+ obj_type *ring = (void *)&(r)[1]; \
if (likely(idx + n < size)) { \
for (i = 0; i < (n & ((~(unsigned)0x3))); i+=4, idx+=4) { \
- r->ring[idx] = obj_table[i]; \
- r->ring[idx+1] = obj_table[i+1]; \
- r->ring[idx+2] = obj_table[i+2]; \
- r->ring[idx+3] = obj_table[i+3]; \
+ ring[idx] = obj_table[i]; \
+ ring[idx+1] = obj_table[i+1]; \
+ ring[idx+2] = obj_table[i+2]; \
+ ring[idx+3] = obj_table[i+3]; \
} \
switch (n & 0x3) { \
- case 3: r->ring[idx++] = obj_table[i++]; \
- case 2: r->ring[idx++] = obj_table[i++]; \
- case 1: r->ring[idx++] = obj_table[i++]; \
+ case 3: \
+ ring[idx++] = obj_table[i++]; /* fallthrough */ \
+ case 2: \
+ ring[idx++] = obj_table[i++]; /* fallthrough */ \
+ case 1: \
+ ring[idx++] = obj_table[i++]; \
} \
} else { \
for (i = 0; idx < size; i++, idx++)\
- r->ring[idx] = obj_table[i]; \
+ ring[idx] = obj_table[i]; \
for (idx = 0; i < n; i++, idx++) \
- r->ring[idx] = obj_table[i]; \
+ ring[idx] = obj_table[i]; \
} \
-} while(0)
+} while (0)
/* the actual copy of pointers on the ring to obj_table.
* Placed here since identical code needed in both
* single and multi consumer dequeue functions */
-#define DEQUEUE_PTRS() do { \
+#define DEQUEUE_PTRS(r, obj_table, n, cons_head, obj_type) do { \
unsigned int i; \
- uint32_t idx = cons_head & r->mask; \
- const uint32_t size = r->size; \
+ uint32_t idx = cons_head & (r)->mask; \
+ const uint32_t size = (r)->size; \
+ obj_type *ring = (void *)&(r)[1]; \
if (likely(idx + n < size)) { \
for (i = 0; i < (n & (~(unsigned)0x3)); i+=4, idx+=4) {\
- obj_table[i] = r->ring[idx]; \
- obj_table[i+1] = r->ring[idx+1]; \
- obj_table[i+2] = r->ring[idx+2]; \
- obj_table[i+3] = r->ring[idx+3]; \
+ obj_table[i] = ring[idx]; \
+ obj_table[i+1] = ring[idx+1]; \
+ obj_table[i+2] = ring[idx+2]; \
+ obj_table[i+3] = ring[idx+3]; \
} \
switch (n & 0x3) { \
- case 3: obj_table[i++] = r->ring[idx++]; \
- case 2: obj_table[i++] = r->ring[idx++]; \
- case 1: obj_table[i++] = r->ring[idx++]; \
+ case 3: \
+ obj_table[i++] = ring[idx++]; /* fallthrough */ \
+ case 2: \
+ obj_table[i++] = ring[idx++]; /* fallthrough */ \
+ case 1: \
+ obj_table[i++] = ring[idx++]; \
} \
} else { \
for (i = 0; idx < size; i++, idx++) \
- obj_table[i] = r->ring[idx]; \
+ obj_table[i] = ring[idx]; \
for (idx = 0; i < n; i++, idx++) \
- obj_table[i] = r->ring[idx]; \
+ obj_table[i] = ring[idx]; \
} \
} while (0)
@@ -444,7 +448,7 @@ __rte_ring_do_enqueue(struct rte_ring *r, void * const *obj_table,
if (n == 0)
goto end;
- ENQUEUE_PTRS();
+ ENQUEUE_PTRS(r, obj_table, n, prod_head, void *);
rte_smp_wmb();
update_tail(&r->prod, prod_head, prod_next);
@@ -547,7 +551,7 @@ __rte_ring_do_dequeue(struct rte_ring *r, void **obj_table,
if (n == 0)
goto end;
- DEQUEUE_PTRS();
+ DEQUEUE_PTRS(r, obj_table, n, cons_head, void *);
rte_smp_rmb();
update_tail(&r->cons, cons_head, cons_next);
--
2.9.3
next prev parent reply other threads:[~2017-02-07 14:14 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-25 12:14 [dpdk-dev] rte_ring features in use (or not) Bruce Richardson
2017-01-25 12:16 ` Bruce Richardson
2017-01-25 13:20 ` Olivier MATZ
2017-01-25 13:54 ` Bruce Richardson
2017-01-25 14:48 ` Bruce Richardson
2017-01-25 15:59 ` Wiles, Keith
2017-01-25 16:57 ` Bruce Richardson
2017-01-25 17:29 ` Ananyev, Konstantin
2017-01-31 10:53 ` Olivier Matz
2017-01-31 11:41 ` Bruce Richardson
2017-01-31 12:10 ` Bruce Richardson
2017-01-31 13:27 ` Olivier Matz
2017-01-31 13:46 ` Bruce Richardson
2017-01-25 22:27 ` Wiles, Keith
2017-01-25 16:39 ` Stephen Hemminger
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 00/19] ring cleanup and generalization Bruce Richardson
2017-02-14 8:32 ` Olivier Matz
2017-02-14 9:39 ` Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 01/19] app/pdump: fix duplicate macro definition Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 02/19] ring: remove split cacheline build setting Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 03/19] ring: create common structure for prod and cons metadata Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 04/19] ring: add a function to return the ring size Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 05/19] crypto/null: use ring size function Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 06/19] ring: eliminate duplication of size and mask fields Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 07/19] ring: remove debug setting Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 08/19] ring: remove the yield when waiting for tail update Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 09/19] ring: remove watermark support Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 10/19] ring: make bulk and burst fn return vals consistent Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 11/19] ring: allow enq fns to return free space value Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 12/19] examples/quota_watermark: use ring space for watermarks Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 13/19] ring: allow dequeue fns to return remaining entry count Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 14/19] ring: reduce scope of local variables Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 15/19] ring: separate out head index manipulation for enq/deq Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 16/19] ring: create common function for updating tail idx Bruce Richardson
2017-02-07 14:12 ` Bruce Richardson [this message]
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 18/19] ring: add object size parameter to memory size calculation Bruce Richardson
2017-02-07 14:12 ` [dpdk-dev] [PATCH RFCv3 19/19] ring: add event ring implementation Bruce Richardson
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