search for: mtu_siz

...hput if larger (e.g., PAGE_SIZE) buffers > > are used. > > > > This commit auto-tunes the mergeable receiver buffer packet size by > > choosing the packet buffer size based on an EWMA of the recent packet > > sizes for the receive queue. Packet buffer sizes range from MTU_SIZE + > > virtio-net header len to PAGE_SIZE. This improves throughput for > > large packet workloads, as any workload with average packet size >= > > PAGE_SIZE will use PAGE_SIZE buffers. > > > > These optimizations interact positively with recent commit > > ba...

...with large average packet sizes have higher throughput if larger (e.g., PAGE_SIZE) buffers are used. This commit auto-tunes the mergeable receiver buffer packet size by choosing the packet buffer size based on an EWMA of the recent packet sizes for the receive queue. Packet buffer sizes range from MTU_SIZE + virtio-net header len to PAGE_SIZE. This improves throughput for large packet workloads, as any workload with average packet size >= PAGE_SIZE will use PAGE_SIZE buffers. These optimizations interact positively with recent commit ba275241030c ("virtio-net: coalesce rx frags when possibl...

skb_page_frag_refill currently permits only order-0 page allocs unless GFP_WAIT is used. Change skb_page_frag_refill to attempt higher-order page allocations whether or not GFP_WAIT is used. If memory cannot be allocated, the allocator will fall back to successively smaller page allocs (down to order-0 page allocs). This change brings skb_page_frag_refill in line with the existing page allocation

skb_page_frag_refill currently permits only order-0 page allocs unless GFP_WAIT is used. Change skb_page_frag_refill to attempt higher-order page allocations whether or not GFP_WAIT is used. If memory cannot be allocated, the allocator will fall back to successively smaller page allocs (down to order-0 page allocs). This change brings skb_page_frag_refill in line with the existing page allocation

...with large average packet sizes have higher throughput if larger (e.g., PAGE_SIZE) buffers are used. This commit auto-tunes the mergeable receiver buffer packet size by choosing the packet buffer size based on an EWMA of the recent packet sizes for the receive queue. Packet buffer sizes range from MTU_SIZE + virtio-net header len to PAGE_SIZE. This improves throughput for large packet workloads, as any workload with average packet size >= PAGE_SIZE will use PAGE_SIZE buffers. These optimizations interact positively with recent commit ba275241030c ("virtio-net: coalesce rx frags when possibl...

...gher throughput if larger (e.g., PAGE_SIZE) buffers are used. > > > > This commit auto-tunes the mergeable receiver buffer packet size by choosing > > the packet buffer size based on an EWMA of the recent packet sizes for the > > receive queue. Packet buffer sizes range from MTU_SIZE + virtio-net header > > len to PAGE_SIZE. This improves throughput for large packet workloads, as > > any workload with average packet size >= PAGE_SIZE will use PAGE_SIZE > > buffers. > > Hi Michael: > > There's one concern with EWMA. How well does it handle...

...t sizes > have higher throughput if larger (e.g., PAGE_SIZE) buffers are used. > > This commit auto-tunes the mergeable receiver buffer packet size by choosing > the packet buffer size based on an EWMA of the recent packet sizes for the > receive queue. Packet buffer sizes range from MTU_SIZE + virtio-net header > len to PAGE_SIZE. This improves throughput for large packet workloads, as > any workload with average packet size >= PAGE_SIZE will use PAGE_SIZE > buffers. Hi Michael: There's one concern with EWMA. How well does it handle multiple streams each with differe...

...t sizes > have higher throughput if larger (e.g., PAGE_SIZE) buffers are used. > > This commit auto-tunes the mergeable receiver buffer packet size by choosing > the packet buffer size based on an EWMA of the recent packet sizes for the > receive queue. Packet buffer sizes range from MTU_SIZE + virtio-net header > len to PAGE_SIZE. This improves throughput for large packet workloads, as > any workload with average packet size >= PAGE_SIZE will use PAGE_SIZE > buffers. Hi Michael: There's one concern with EWMA. How well does it handle multiple streams each with differe...

...with large average packet sizes have higher throughput if larger (e.g., PAGE_SIZE) buffers are used. This commit auto-tunes the mergeable receiver buffer packet size by choosing the packet buffer size based on an EWMA of the recent packet sizes for the receive queue. Packet buffer sizes range from MTU_SIZE + virtio-net header len to PAGE_SIZE. This improves throughput for large packet workloads, as any workload with average packet size >= PAGE_SIZE will use PAGE_SIZE buffers. These optimizations interact positively with recent commit ba275241030c ("virtio-net: coalesce rx frags when possibl...

...t sizes > have higher throughput if larger (e.g., PAGE_SIZE) buffers are used. > > This commit auto-tunes the mergeable receiver buffer packet size by choosing > the packet buffer size based on an EWMA of the recent packet sizes for the > receive queue. Packet buffer sizes range from MTU_SIZE + virtio-net header > len to PAGE_SIZE. This improves throughput for large packet workloads, as > any workload with average packet size >= PAGE_SIZE will use PAGE_SIZE > buffers. > > These optimizations interact positively with recent commit > ba275241030c ("virtio-net: c...

...t sizes > have higher throughput if larger (e.g., PAGE_SIZE) buffers are used. > > This commit auto-tunes the mergeable receiver buffer packet size by choosing > the packet buffer size based on an EWMA of the recent packet sizes for the > receive queue. Packet buffer sizes range from MTU_SIZE + virtio-net header > len to PAGE_SIZE. This improves throughput for large packet workloads, as > any workload with average packet size >= PAGE_SIZE will use PAGE_SIZE > buffers. > > These optimizations interact positively with recent commit > ba275241030c ("virtio-net: c...

...with large average packet sizes have higher throughput if larger (e.g., PAGE_SIZE) buffers are used. This commit auto-tunes the mergeable receiver buffer packet size by choosing the packet buffer size based on an EWMA of the recent packet sizes for the receive queue. Packet buffer sizes range from MTU_SIZE + virtio-net header len to PAGE_SIZE. This improves throughput for large packet workloads, as any workload with average packet size >= PAGE_SIZE will use PAGE_SIZE buffers. These optimizations interact positively with recent commit ba275241030c ("virtio-net: coalesce rx frags when possibl...

...t sizes have higher throughput if larger (e.g., PAGE_SIZE) buffers > are used. > > This commit auto-tunes the mergeable receiver buffer packet size by > choosing the packet buffer size based on an EWMA of the recent packet > sizes for the receive queue. Packet buffer sizes range from MTU_SIZE + > virtio-net header len to PAGE_SIZE. This improves throughput for > large packet workloads, as any workload with average packet size >= > PAGE_SIZE will use PAGE_SIZE buffers. > > These optimizations interact positively with recent commit > ba275241030c ("virtio-net: c...

...t sizes have higher throughput if larger (e.g., PAGE_SIZE) buffers > are used. > > This commit auto-tunes the mergeable receiver buffer packet size by > choosing the packet buffer size based on an EWMA of the recent packet > sizes for the receive queue. Packet buffer sizes range from MTU_SIZE + > virtio-net header len to PAGE_SIZE. This improves throughput for > large packet workloads, as any workload with average packet size >= > PAGE_SIZE will use PAGE_SIZE buffers. > > These optimizations interact positively with recent commit > ba275241030c ("virtio-net: c...

Commit 2613af0ed18a ("virtio_net: migrate mergeable rx buffers to page frag allocators") changed the mergeable receive buffer size from PAGE_SIZE to MTU-size. However, the merge buffer size does not take into account the size of the virtio-net header. Consequently, packets that are MTU-size will take two buffers intead of one (to store the virtio-net header), substantially decreasing the

Commit 2613af0ed18a ("virtio_net: migrate mergeable rx buffers to page frag allocators") changed the mergeable receive buffer size from PAGE_SIZE to MTU-size. However, the merge buffer size does not take into account the size of the virtio-net header. Consequently, packets that are MTU-size will take two buffers intead of one (to store the virtio-net header), substantially decreasing the

skb_page_frag_refill currently permits only order-0 page allocs unless GFP_WAIT is used. Change skb_page_frag_refill to attempt higher-order page allocations whether or not GFP_WAIT is used. If memory cannot be allocated, the allocator will fall back to successively smaller page allocs (down to order-0 page allocs). This change brings skb_page_frag_refill in line with the existing page allocation

skb_page_frag_refill currently permits only order-0 page allocs unless GFP_WAIT is used. Change skb_page_frag_refill to attempt higher-order page allocations whether or not GFP_WAIT is used. If memory cannot be allocated, the allocator will fall back to successively smaller page allocs (down to order-0 page allocs). This change brings skb_page_frag_refill in line with the existing page allocation

...sizes have higher throughput if larger (e.g., PAGE_SIZE) buffers > are used. > > This commit auto-tunes the mergeable receiver buffer packet size by > choosing the packet buffer size based on an EWMA of the recent packet > sizes for the receive queue. Packet buffer sizes range from MTU_SIZE + > virtio-net header len to PAGE_SIZE. This improves throughput for > large packet workloads, as any workload with average packet size >= > PAGE_SIZE will use PAGE_SIZE buffers. > > These optimizations interact positively with recent commit > ba275241030c ("virtio-net:...

...sizes have higher throughput if larger (e.g., PAGE_SIZE) buffers > are used. > > This commit auto-tunes the mergeable receiver buffer packet size by > choosing the packet buffer size based on an EWMA of the recent packet > sizes for the receive queue. Packet buffer sizes range from MTU_SIZE + > virtio-net header len to PAGE_SIZE. This improves throughput for > large packet workloads, as any workload with average packet size >= > PAGE_SIZE will use PAGE_SIZE buffers. > > These optimizations interact positively with recent commit > ba275241030c ("virtio-net:...