What is Message-signaled interrupts (MSI)?
A scheme in which a device signals an interrupt by writing to a designated address. It needs no dedicated interrupt wire and lets one device have many interrupts.
Field: I/O Interfaces & Buses
A scheme in which a device signals an interrupt by writing to a designated address. It needs no dedicated interrupt wire and lets one device have many interrupts.
Field: I/O Interfaces & Buses
With MSI, the device writes a designated value to an address set by the OS, and that write arrives at the CPU as an interrupt.
What is a characteristic of MSI (message-signaled interrupt…PCI Express Interrupt 128b/130b encoding 8b/10b encoding AXI Bit error rate (BER) Characteristic impedance Clock and data recovery (CDR) Compute Express Link (CXL) Credit-based flow control