virtio notify
virtio feature : VIRTIO_RING_F_EVENT_IDX 我们这里抽象下，先定义一个producer, consumer的模型, 将 event_idx定义为head，将vring.idx定义为tail, 即 consumer modify head producer modify tail(和vring.idx一样，表示producer下次要存储数据的位置) ...
one step at a time
一文搞懵IO虚拟化之 -- virtio
overflow virtio: ABSTRACTION API virtio-vring virtqueue ops vring vring struct vring notify sample of handle VirtIO ...
Ebpf
Bpf Verify
Bpf Jit
Bpf Isa
Bpf Overflow
BPF 起源 BPF 起源于1992, Steven McCanne 和 Van Jacobso 发布了论文: <<The BSD Packet Filter: A New Architecture for User-level Packet Capture>>1, 该论文 主要提供了一种包过滤的技术，比其当时的包过滤技术快20倍.1 abstract. 该包过滤...
page request
10.4 Page Request Services The general model for a page request is as follows: A Function determines that it requires access to a page for which an ATS translation is not available. ...
drain pasid
PASID 简介 PASID overflow PASID 全称Process Address Space ID, PASID 同 requester ID结合，共同确定该request 所映射的地址空间。所以 PASID 和 ASID 类似, 均标识一个地址映射关系。但是ASID 用于 标识CPU 侧的memory request，而PASID 则标识PCIe end point 的D...
[perftest] core-to-core-latency
使用方法 core-to-core-latency USAGE: core-to-core-latency [OPTIONS] [ARGS] ARGS: <NUM_ITERATIONS> The number of iterations per sample [default: 1000] <NUM_SAMPLES> Th...