Message-Signaled Interrupts
Message Signaled Interrupts (MSI ) are a type of interrupts available in computer systems with PCI 2.2 and higher. The MSI -capable devices call for a treatment is not by an electronic signal, but on messages that are written via the PCI bus to a particular address.
Important advantages of this type of interrupts are:
- Devices can generate different interrupts ( News )
- Interrupt sharing is avoided ( not a " fixed" number as for Interruptsignalleitungen )
- No confirmation, thus faster
- Peripheral bus (internal)
- Computer Architecture