[dpdk-dev] [PATCH 4/5] mempool: introduce function to get mempool page size
Olivier Matz
olivier.matz at 6wind.com
Mon Oct 28 15:01:21 CET 2019
In rte_mempool_populate_default(), we determine the page size,
which is needed for calc_size and allocation of memory.
Move this in a function and export it, it will be used in next
commit.
Signed-off-by: Olivier Matz <olivier.matz at 6wind.com>
---
lib/librte_mempool/rte_mempool.c | 51 ++++++++++++++--------
lib/librte_mempool/rte_mempool.h | 7 +++
lib/librte_mempool/rte_mempool_version.map | 1 +
3 files changed, 40 insertions(+), 19 deletions(-)
diff --git a/lib/librte_mempool/rte_mempool.c b/lib/librte_mempool/rte_mempool.c
index 5e1f202dc..7664764e5 100644
--- a/lib/librte_mempool/rte_mempool.c
+++ b/lib/librte_mempool/rte_mempool.c
@@ -411,6 +411,33 @@ rte_mempool_populate_virt(struct rte_mempool *mp, char *addr,
return ret;
}
+/* Get the minimal page size used in a mempool before populating it. */
+int
+rte_mempool_get_page_size(struct rte_mempool *mp, size_t *pg_sz)
+{
+ bool need_iova_contig_obj;
+ bool alloc_in_ext_mem;
+ int ret;
+
+ /* check if we can retrieve a valid socket ID */
+ ret = rte_malloc_heap_socket_is_external(mp->socket_id);
+ if (ret < 0)
+ return -EINVAL;
+ alloc_in_ext_mem = (ret == 1);
+ need_iova_contig_obj = !(mp->flags & MEMPOOL_F_NO_IOVA_CONTIG);
+
+ if (!need_iova_contig_obj)
+ *pg_sz = 0;
+ else if (!alloc_in_ext_mem && rte_eal_iova_mode() == RTE_IOVA_VA)
+ *pg_sz = 0;
+ else if (rte_eal_has_hugepages() || alloc_in_ext_mem)
+ *pg_sz = get_min_page_size(mp->socket_id);
+ else
+ *pg_sz = getpagesize();
+
+ return 0;
+}
+
/* Default function to populate the mempool: allocate memory in memzones,
* and populate them. Return the number of objects added, or a negative
* value on error.
@@ -422,12 +449,11 @@ rte_mempool_populate_default(struct rte_mempool *mp)
char mz_name[RTE_MEMZONE_NAMESIZE];
const struct rte_memzone *mz;
ssize_t mem_size;
- size_t align, pg_sz, pg_shift;
+ size_t align, pg_sz, pg_shift = 0;
rte_iova_t iova;
unsigned mz_id, n;
int ret;
bool need_iova_contig_obj;
- bool alloc_in_ext_mem;
ret = mempool_ops_alloc_once(mp);
if (ret != 0)
@@ -482,26 +508,13 @@ rte_mempool_populate_default(struct rte_mempool *mp)
* synonymous with IOVA contiguousness will not hold.
*/
- /* check if we can retrieve a valid socket ID */
- ret = rte_malloc_heap_socket_is_external(mp->socket_id);
- if (ret < 0)
- return -EINVAL;
- alloc_in_ext_mem = (ret == 1);
need_iova_contig_obj = !(mp->flags & MEMPOOL_F_NO_IOVA_CONTIG);
+ ret = rte_mempool_get_page_size(mp, &pg_sz);
+ if (ret < 0)
+ return ret;
- if (!need_iova_contig_obj) {
- pg_sz = 0;
- pg_shift = 0;
- } else if (!alloc_in_ext_mem && rte_eal_iova_mode() == RTE_IOVA_VA) {
- pg_sz = 0;
- pg_shift = 0;
- } else if (rte_eal_has_hugepages() || alloc_in_ext_mem) {
- pg_sz = get_min_page_size(mp->socket_id);
- pg_shift = rte_bsf32(pg_sz);
- } else {
- pg_sz = getpagesize();
+ if (pg_sz != 0)
pg_shift = rte_bsf32(pg_sz);
- }
for (mz_id = 0, n = mp->size; n > 0; mz_id++, n -= ret) {
size_t min_chunk_size;
diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h
index 8fa3c04e5..6d98b3743 100644
--- a/lib/librte_mempool/rte_mempool.h
+++ b/lib/librte_mempool/rte_mempool.h
@@ -1691,6 +1691,13 @@ uint32_t rte_mempool_calc_obj_size(uint32_t elt_size, uint32_t flags,
void rte_mempool_walk(void (*func)(struct rte_mempool *, void *arg),
void *arg);
+/**
+ * @internal Get page size used for mempool object allocation.
+ */
+__rte_experimental
+int
+rte_mempool_get_page_size(struct rte_mempool *mp, size_t *pg_sz);
+
#ifdef __cplusplus
}
#endif
diff --git a/lib/librte_mempool/rte_mempool_version.map b/lib/librte_mempool/rte_mempool_version.map
index 17cbca460..4eff2767d 100644
--- a/lib/librte_mempool/rte_mempool_version.map
+++ b/lib/librte_mempool/rte_mempool_version.map
@@ -56,5 +56,6 @@ DPDK_18.05 {
EXPERIMENTAL {
global:
+ rte_mempool_get_page_size;
rte_mempool_ops_get_info;
};
--
2.20.1
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