Server delay control device, server delay control method, and program

A server delay control method of a server delay control device for performing, on a server deployed on a computer comprising one or more hardware processors, packet transfer from an interface part of the computer, the server comprising an OS and implemented using one or more of the one or more hardware processors, the server delay control device implemented using one or more of the one or more hardware processors, the OS comprising:

• a kernel in which the server delay control device is deployed;
• a ring buffer managed by the kernel, in a memory space in which the server deploys the OS;
• and a poll list in which information on a net device is registered, the information on the net device being indicative of which device a hardware interrupt from an interface part comes from, the server delay control method comprising steps of:
• monitoring, by a thread spawned in the kernel by the server delay control device, the poll list repeatedly in a loop to monitor a packet arrival according to a polling model, independently of an application executed on the OS;
• when a packet has arrived, referencing, by the server delay control device, the packet held in the ring buffer, and performing, by the server delay control device, dequeuing to remove a corresponding queue entry from the ring buffer, independently of an application executed on the OS without software interrupts;
• and
• when there is no packet arrival over a predetermined period of time during which the thread monitors the poll list to monitor the packet arrival according to the polling model, causing, by the server delay control device, the thread to sleep independently of an application executed on the OS without software interrupts and, when a packet arrives, canceling, by a hardware interrupt handler implemented in the server delay control device, the sleep of the thread.

A non-transitory computer-readable medium storing a computer program for a server delay control device for performing, on a server deployed on a computer comprising one or more hardware processors, packet transfer from an interface part of the computer, the server comprising an OS and implemented using one or more of the one or more hardware processors, the server delay control device implemented using one or more of the one or more hardware processors, the OS comprising:

• a kernel in which the server delay control device is deployed;
• a ring buffer managed by the kernel, in a memory space in which the server deploys the OS;
• and a poll list in which information on a net device is registered, the information on the net device being indicative of which device a hardware interrupt from an interface part comes from, the computer program causing the server delay control device to execute steps comprising:
• monitoring, by a thread spawned in the kernel by the server delay control device, the poll list repeatedly in a loop to monitor a packet arrival according to a polling model, independently of an application executed on the OS;
• when a packet has arrived, referencing, by the server delay control device, the packet held in the ring buffer, and performing, by the server delay control device, dequeuing to remove a corresponding queue entry from the ring buffer, independently of an application executed on the OS without software interrupts;
• and
• when there is no packet arrival over a predetermined period of time during which the thread monitors the poll list to monitor the packet arrival according to the polling model, causing, by the server delay control device, the thread to sleep independently of an application executed on the OS without software interrupts and, when a packet arrives, canceling, by a hardware interrupt handler implemented in the server delay control device, the sleep of the thread.