patches for DPDK stable branches
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* [dpdk-stable] [PATCH 1/6] vhost: fix missing memory table NUMA realloc
       [not found] <20210615083308.137401-1-maxime.coquelin@redhat.com>
@ 2021-06-15  8:33 ` Maxime Coquelin
  2021-06-15  8:33 ` [dpdk-stable] [PATCH 2/6] vhost: fix missing guest pages " Maxime Coquelin
  1 sibling, 0 replies; 2+ messages in thread
From: Maxime Coquelin @ 2021-06-15  8:33 UTC (permalink / raw)
  To: dev, david.marchand, chenbo.xia; +Cc: Maxime Coquelin, stable

When the guest allocates virtqueues on a different NUMA node
than the one the Vhost metadata are allocated, both the Vhost
device struct and the virtqueues struct are reallocated.

However, reallocating the Vhost memory table was missing, which
likely causes iat least one cross-NUMA accesses for every burst
of packets.

This patch reallocates this table on the same NUMA node as the
other metadata.

Fixes: 552e8fd3d2b4 ("vhost: simplify memory regions handling")
Cc: stable@dpdk.org

Reported-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 lib/vhost/vhost_user.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
index 8f0eba6412..031e3bfa2f 100644
--- a/lib/vhost/vhost_user.c
+++ b/lib/vhost/vhost_user.c
@@ -557,6 +557,9 @@ numa_realloc(struct virtio_net *dev, int index)
 		goto out;
 	}
 	if (oldnode != newnode) {
+		struct rte_vhost_memory *old_mem;
+		ssize_t mem_size;
+
 		VHOST_LOG_CONFIG(INFO,
 			"reallocate dev from %d to %d node\n",
 			oldnode, newnode);
@@ -568,6 +571,18 @@ numa_realloc(struct virtio_net *dev, int index)
 
 		memcpy(dev, old_dev, sizeof(*dev));
 		rte_free(old_dev);
+
+		mem_size = sizeof(struct rte_vhost_memory) +
+			sizeof(struct rte_vhost_mem_region) * dev->mem->nregions;
+		old_mem = dev->mem;
+		dev->mem = rte_malloc_socket(NULL, mem_size, 0, newnode);
+		if (!dev->mem) {
+			dev->mem = old_mem;
+			goto out;
+		}
+
+		memcpy(dev->mem, old_mem, mem_size);
+		rte_free(old_mem);
 	}
 
 out:
-- 
2.31.1


^ permalink raw reply	[flat|nested] 2+ messages in thread

* [dpdk-stable] [PATCH 2/6] vhost: fix missing guest pages table NUMA realloc
       [not found] <20210615083308.137401-1-maxime.coquelin@redhat.com>
  2021-06-15  8:33 ` [dpdk-stable] [PATCH 1/6] vhost: fix missing memory table NUMA realloc Maxime Coquelin
@ 2021-06-15  8:33 ` Maxime Coquelin
  1 sibling, 0 replies; 2+ messages in thread
From: Maxime Coquelin @ 2021-06-15  8:33 UTC (permalink / raw)
  To: dev, david.marchand, chenbo.xia; +Cc: Maxime Coquelin, stable

When the guest allocates virtqueues on a different NUMA node
than the one the Vhost metadata are allocated, both the Vhost
device struct and the virtqueues struct are reallocated.

However, reallocating the guest pages table was missing, which
likely causes at least one cross-NUMA accesses for every burst
of packets.

This patch reallocates this table on the same NUMA node as the
other metadata.

Fixes: e246896178e6 ("vhost: get guest/host physical address mappings")
Cc: stable@dpdk.org

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 lib/vhost/vhost_user.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
index 031e3bfa2f..cbfdf1b4d8 100644
--- a/lib/vhost/vhost_user.c
+++ b/lib/vhost/vhost_user.c
@@ -558,7 +558,8 @@ numa_realloc(struct virtio_net *dev, int index)
 	}
 	if (oldnode != newnode) {
 		struct rte_vhost_memory *old_mem;
-		ssize_t mem_size;
+		struct guest_page *old_gp;
+		ssize_t mem_size, gp_size;
 
 		VHOST_LOG_CONFIG(INFO,
 			"reallocate dev from %d to %d node\n",
@@ -583,6 +584,17 @@ numa_realloc(struct virtio_net *dev, int index)
 
 		memcpy(dev->mem, old_mem, mem_size);
 		rte_free(old_mem);
+
+		gp_size = dev->max_guest_pages * sizeof(*dev->guest_pages);
+		old_gp = dev->guest_pages;
+		dev->guest_pages = rte_malloc_socket(NULL, gp_size, RTE_CACHE_LINE_SIZE, newnode);
+		if (!dev->guest_pages) {
+			dev->guest_pages = old_gp;
+			goto out;
+		}
+
+		memcpy(dev->guest_pages, old_gp, gp_size);
+		rte_free(old_gp);
 	}
 
 out:
-- 
2.31.1


^ permalink raw reply	[flat|nested] 2+ messages in thread

end of thread, other threads:[~2021-06-15  8:33 UTC | newest]

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
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     [not found] <20210615083308.137401-1-maxime.coquelin@redhat.com>
2021-06-15  8:33 ` [dpdk-stable] [PATCH 1/6] vhost: fix missing memory table NUMA realloc Maxime Coquelin
2021-06-15  8:33 ` [dpdk-stable] [PATCH 2/6] vhost: fix missing guest pages " Maxime Coquelin

patches for DPDK stable branches

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