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You don't bypass the kernel, you bypass the TCP stack of the kernel and this is for very specific applications.
by shin_lao 11y ago
You don't bypass the kernel, you bypass the TCP stack of the kernel and this is for very specific applications.
- elihu 11y agoBypassing the kernel entirely is pretty normal in HPC applications. Infiniband implementations typically memory-map the device's registers into user-space so that applications can send and receive messages without a system call.
- shin_lao 11y agoThis is not bypassing a kernel. This is called Remote Direct Memory Access (RDMA) and there is still a kernel. FYI most of the devices inside your computer work through DMA.
- EvanPlaice 11y agoOn in particular is network capturing via libpcap. It's basically an alternative driver that comes with additional capabilities. Such as capturing promiscuously, and filtering captures.