From: "Xia, Chenbo" <chenbo.xia@intel.com> To: Maxime Coquelin <maxime.coquelin@redhat.com>, "dev@dpdk.org" <dev@dpdk.org>, "david.marchand@redhat.com" <david.marchand@redhat.com> Cc: "stable@dpdk.org" <stable@dpdk.org> Subject: Re: [dpdk-stable] [PATCH v4 1/7] vhost: fix missing memory table NUMA realloc Date: Fri, 18 Jun 2021 04:34:37 +0000 Message-ID: <MN2PR11MB4063F4CAAADC2D434C6393959C0D9@MN2PR11MB4063.namprd11.prod.outlook.com> (raw) In-Reply-To: <20210617153739.178011-2-maxime.coquelin@redhat.com> Hi Maxime, > -----Original Message----- > From: Maxime Coquelin <maxime.coquelin@redhat.com> > Sent: Thursday, June 17, 2021 11:38 PM > To: dev@dpdk.org; david.marchand@redhat.com; Xia, Chenbo <chenbo.xia@intel.com> > Cc: Maxime Coquelin <maxime.coquelin@redhat.com>; stable@dpdk.org > Subject: [PATCH v4 1/7] vhost: fix missing memory table NUMA realloc > > 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. 'at least' ? > > 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) As we are realloc more things now, the comment above 'numa_realloc(XXX)' should also be changed like: Reallocate related data structure to make them on the same numa node as the memory of vring descriptor. Thanks, Chenbo > 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
next prev parent reply other threads:[~2021-06-18 4:34 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <20210617153739.178011-1-maxime.coquelin@redhat.com> 2021-06-17 15:37 ` Maxime Coquelin 2021-06-18 4:34 ` Xia, Chenbo [this message] 2021-06-18 7:40 ` Maxime Coquelin 2021-06-17 15:37 ` [dpdk-stable] [PATCH v4 2/7] vhost: fix missing guest pages " Maxime Coquelin 2021-06-17 15:37 ` [dpdk-stable] [PATCH v4 4/7] vhost: fix NUMA reallocation with multiqueue Maxime Coquelin 2021-06-18 4:34 ` Xia, Chenbo 2021-06-18 8:01 ` Maxime Coquelin 2021-06-18 8:21 ` Xia, Chenbo 2021-06-18 8:48 ` Maxime Coquelin 2021-06-24 10:49 ` Xia, Chenbo
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