[v4] kni: optimize alloc queue release
Checks
Commit Message
The kni alloc queue is filled with physical addresses of mbufs
for kernel consumption. Any unused mbufs in the alloc queue are
freed during shutdown sequence in rte_kni_release.
In the existing implementation, for freeing one entry of alloc
queue all the objects of the mempool are traversed to find
a match. This process is repeated for all the objects of the
alloc queue which consumes lot of cpu cycles.
Instead of using mempool object iteration method,use
``rte_mem_iova2virt()`` api to get the virtual address
for the physical addresses of alloc_q objects.
This speeds up the freeing process.
Signed-off-by: Naga Harish K S V <s.v.naga.harish.k@intel.com>
---
v2:
* fix checkpatch errors
v3:
* fix commit message as per review comments
v4:
* update commit message as per review comments
---
lib/kni/rte_kni.c | 23 ++++++++---------------
1 file changed, 8 insertions(+), 15 deletions(-)
Comments
Hi all,
Looks like this patch is out there for review for quite some time.
Can somebody review this patch?
-Harish
@@ -375,26 +375,19 @@ va2pa_all(struct rte_mbuf *mbuf)
}
static void
-obj_free(struct rte_mempool *mp __rte_unused, void *opaque, void *obj,
- unsigned obj_idx __rte_unused)
-{
- struct rte_mbuf *m = obj;
- void *mbuf_phys = opaque;
-
- if (va2pa(m) == mbuf_phys)
- rte_pktmbuf_free(m);
-}
-
-static void
-kni_free_fifo_phy(struct rte_mempool *mp, struct rte_kni_fifo *fifo)
+kni_free_fifo_phy(struct rte_kni_fifo *fifo)
{
void *mbuf_phys;
int ret;
+ struct rte_mbuf *m;
do {
ret = kni_fifo_get(fifo, &mbuf_phys, 1);
- if (ret)
- rte_mempool_obj_iter(mp, obj_free, mbuf_phys);
+ if (ret) {
+ m = (struct rte_mbuf *)
+ rte_mem_iova2virt((rte_iova_t)mbuf_phys);
+ rte_pktmbuf_free(m);
+ }
} while (ret);
}
@@ -440,7 +433,7 @@ rte_kni_release(struct rte_kni *kni)
if (kni_fifo_count(kni->rx_q))
RTE_LOG(ERR, KNI, "Fail to free all Rx-q items\n");
- kni_free_fifo_phy(kni->pktmbuf_pool, kni->alloc_q);
+ kni_free_fifo_phy(kni->alloc_q);
kni_free_fifo(kni->tx_q);
kni_free_fifo(kni->free_q);