From: Ilya Maximets <i.maximets@samsung.com>
To: dev@dpdk.org, Huawei Xie <huawei.xie@intel.com>
Cc: Dyasly Sergey <s.dyasly@samsung.com>,
Yuanhan Liu <yuanhan.liu@linux.intel.com>,
Ilya Maximets <i.maximets@samsung.com>
Subject: [dpdk-dev] [PATCH v4] vhost: use SMP barriers instead of compiler ones.
Date: Fri, 18 Mar 2016 15:23:53 +0300 [thread overview]
Message-ID: <1458303833-14815-1-git-send-email-i.maximets@samsung.com> (raw)
In-Reply-To: <1456314438-4021-2-git-send-email-i.maximets@samsung.com>
Since commit 4c02e453cc62 ("eal: introduce SMP memory barriers") virtio
uses architecture dependent SMP barriers. vHost should use them too.
Fixes: 4c02e453cc62 ("eal: introduce SMP memory barriers")
Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
---
lib/librte_vhost/vhost_rxtx.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c
index b4da665..859c669 100644
--- a/lib/librte_vhost/vhost_rxtx.c
+++ b/lib/librte_vhost/vhost_rxtx.c
@@ -315,7 +315,7 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,
rte_prefetch0(&vq->desc[desc_indexes[i+1]]);
}
- rte_compiler_barrier();
+ rte_smp_wmb();
/* Wait until it's our turn to add our buffer to the used ring. */
while (unlikely(vq->last_used_idx != res_start_idx))
@@ -565,7 +565,7 @@ virtio_dev_merge_rx(struct virtio_net *dev, uint16_t queue_id,
nr_used = copy_mbuf_to_desc_mergeable(dev, vq, start, end,
pkts[pkt_idx]);
- rte_compiler_barrier();
+ rte_smp_wmb();
/*
* Wait until it's our turn to add our buffer
@@ -923,7 +923,8 @@ rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t queue_id,
sizeof(vq->used->ring[used_idx]));
}
- rte_compiler_barrier();
+ rte_smp_wmb();
+ rte_smp_rmb();
vq->used->idx += i;
vhost_log_used_vring(dev, vq, offsetof(struct vring_used, idx),
sizeof(vq->used->idx));
--
2.5.0
next prev parent reply other threads:[~2016-03-18 12:24 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-24 11:47 [dpdk-dev] [PATCH RFC v3 0/3] Thread safe rte_vhost_enqueue_burst() Ilya Maximets
2016-02-24 11:47 ` [dpdk-dev] [PATCH RFC v3 1/3] vhost: use SMP barriers instead of compiler ones Ilya Maximets
2016-03-18 10:08 ` Xie, Huawei
2016-03-18 10:23 ` Ilya Maximets
2016-03-18 10:27 ` Xie, Huawei
2016-03-18 10:39 ` Ilya Maximets
2016-03-18 10:47 ` Xie, Huawei
2016-03-18 11:00 ` Ilya Maximets
[not found] ` <C37D651A908B024F974696C65296B57B4C67825C@SHSMSX101.ccr.corp.intel.com>
[not found] ` <56EBE9AE.9070400@samsung.com>
[not found] ` <56EBF256.8040409@samsung.com>
2016-03-18 12:28 ` Ilya Maximets
2016-03-18 12:23 ` Ilya Maximets [this message]
2016-03-18 12:41 ` [dpdk-dev] [PATCH v4] " Yuanhan Liu
2016-03-21 4:49 ` Ilya Maximets
2016-03-21 14:07 ` Ananyev, Konstantin
2016-03-21 17:25 ` Xie, Huawei
2016-03-21 17:36 ` Ananyev, Konstantin
2016-03-23 14:07 ` Xie, Huawei
2016-03-31 13:46 ` Thomas Monjalon
2016-02-24 11:47 ` [dpdk-dev] [PATCH RFC v3 2/3] vhost: make buf vector for scatter RX local Ilya Maximets
2016-02-24 11:47 ` [dpdk-dev] [PATCH RFC v3 3/3] vhost: avoid reordering of used->idx and last_used_idx updating Ilya Maximets
2016-03-17 15:29 ` [dpdk-dev] [PATCH RFC v3 0/3] Thread safe rte_vhost_enqueue_burst() Thomas Monjalon
2016-03-18 8:00 ` Yuanhan Liu
2016-03-18 8:09 ` Thomas Monjalon
2016-03-18 9:16 ` Yuanhan Liu
2016-03-18 9:34 ` Thomas Monjalon
2016-03-18 9:46 ` Yuanhan Liu
2016-03-18 9:55 ` Ilya Maximets
2016-03-18 10:10 ` Xie, Huawei
2016-03-18 10:24 ` Thomas Monjalon
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