On Wed, Jan 27, 2016 at 06:16:37AM +, Xie, Huawei wrote:
> On 1/27/2016 2:02 PM, Yuanhan Liu wrote:
> > On Wed, Jan 27, 2016 at 05:56:56AM +, Xie, Huawei wrote:
> >> On 1/27/2016 11:22 AM, Yuanhan Liu wrote:
> >>> On Wed, Jan 27, 2016 at 02:46:39AM +, Xie, Huawei wrote:
> On 12/3/2
On Wed, Jan 27, 2016 at 05:56:56AM +, Xie, Huawei wrote:
> On 1/27/2016 11:22 AM, Yuanhan Liu wrote:
> > On Wed, Jan 27, 2016 at 02:46:39AM +, Xie, Huawei wrote:
> >> On 12/3/2015 2:03 PM, Yuanhan Liu wrote:
> >>> + if (vq->vhost_hlen == sizeof(struct virtio_net_hdr_mrg_rxbuf)) {
> >>> +
On Wed, Jan 27, 2016 at 02:46:39AM +, Xie, Huawei wrote:
> On 12/3/2015 2:03 PM, Yuanhan Liu wrote:
> > + if (vq->vhost_hlen == sizeof(struct virtio_net_hdr_mrg_rxbuf)) {
> > + *(struct virtio_net_hdr_mrg_rxbuf *)(uintptr_t)desc_addr = hdr;
> > + } else {
> > + *(struct
On 1/27/2016 2:02 PM, Yuanhan Liu wrote:
> On Wed, Jan 27, 2016 at 05:56:56AM +, Xie, Huawei wrote:
>> On 1/27/2016 11:22 AM, Yuanhan Liu wrote:
>>> On Wed, Jan 27, 2016 at 02:46:39AM +, Xie, Huawei wrote:
On 12/3/2015 2:03 PM, Yuanhan Liu wrote:
> + if (vq->vhost_hlen == sizeof(st
On 1/27/2016 11:22 AM, Yuanhan Liu wrote:
> On Wed, Jan 27, 2016 at 02:46:39AM +, Xie, Huawei wrote:
>> On 12/3/2015 2:03 PM, Yuanhan Liu wrote:
>>> + if (vq->vhost_hlen == sizeof(struct virtio_net_hdr_mrg_rxbuf)) {
>>> + *(struct virtio_net_hdr_mrg_rxbuf *)(uintptr_t)desc_addr = hd
On 12/3/2015 2:03 PM, Yuanhan Liu wrote:
> + if (vq->vhost_hlen == sizeof(struct virtio_net_hdr_mrg_rxbuf)) {
> + *(struct virtio_net_hdr_mrg_rxbuf *)(uintptr_t)desc_addr = hdr;
> + } else {
> + *(struct virtio_net_hdr *)(uintptr_t)desc_addr = hdr.hdr;
> + }
Tha
First of all, rte_memcpy() is mostly useful for coping big packets
by leveraging hardware advanced instructions like AVX. But for virtio
net hdr, which is 12 bytes at most, invoking rte_memcpy() will not
introduce any performance boost.
And, to my suprise, rte_memcpy() is huge. Since rte_memcpy()
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