Information processing device, information processing method, and storage medium

Patent metadata

Field	Value
Publication number	US-2019065425-A1
Application number	US-201816100946-A
Country	US
Kind code	A1
Filing date	Aug 10, 2018
Priority date	Aug 25, 2017
Publication date	Feb 28, 2019
Grant date	—

Abstract

An information processing device includes a buffer that stores data blocks of a plurality of flows and from which the data blocks are sequentially read; a processor coupled to the buffer and configured to: monitor an input rate that is a sum of data amounts of the plurality of flows input to the buffer per unit of time, and suppress flowing of a data block into the buffer for one or more of the plurality of flows based on a result of monitoring the input rate.

First claim

What is claimed is:

1 . An information processing device comprising:
a buffer that stores data blocks of a plurality of flows and from which the data blocks are sequentially read; a processor coupled to the buffer and configured to:
monitor an input rate that is a sum of data amounts of the plurality of flows input to the buffer per unit of time, and
suppress flowing of a data block into the buffer for one or more of the plurality of flows based on a result of monitoring the input rate.

2 . The information processing device according to claim 1 ,
wherein the processor is configured to suppress flowing of the data block into the buffer for one or more of the plurality of flows based on the input rate, an increasing or decreasing trend in the input rate, and a reading bandwidth that is amount of data readable from the buffer per unit of time.

3 . The information processing device according to claim 2 , wherein the processor is configured to
suppress flowing of a data block into the buffer for one or more of the plurality of flows when the input rate is higher than a first threshold equal to or lower than the reading bandwidth and tends to increase.

4 . The information processing device according to claim 3 , wherein the processor is configured to
suppress flowing of the data blocks into the buffer for all of the plurality of flows when the input rate is equal to or higher than a second threshold higher than the first threshold and equal to or lower than the reading bandwidth and tends to increase.

5 . The information processing device according to claim 2 , wherein the processor is configured to:
stop flowing of the data block into the buffer for a flow that is among the plurality of flows and satisfies a first requirement for determining that the flow includes burst traffic when the input rate is higher than the reading bandwidth and tends to be maintained; and suppress flowing of the data block into the buffer for the flow that is among the plurality of flows and does not satisfy the first requirement.

6 . The information processing device according to claim 2 , wherein the processor is configured to:
monitor the amount of data existing in the buffer; and promote the data block to flow into the buffer for the one or more flows for which the flow of the data block into the buffer is suppressed, based on the reading bandwidth, the input rate, the amount of the data existing in the buffer, and an increasing or decreasing trend in the input rate.

7 . The information processing device according to claim 5 ,
wherein the first requirement is based on one or more of the amount of an excess token when the amount of tokens accumulated in a token bucket exceeds an upper limit of the amount of tokens capable of being accumulated in the token bucket within a first time period, the amount of data discarded due to the input rate exceeding a set bandwidth within a second time period, the number of times that a burst has occurred within a third time period, and the ratio of the amount of tokens accumulated in the token bucket to the upper limit of the token bucket.

8 . The information processing device according to claim 2 , wherein the processor is configured to:
monitor, in a cycle based on an input rate threshold determined based on the reading bandwidth, whether or not the input rate reaches the input rate threshold using one or more token buckets to which tokens in an amount corresponding to the input rate threshold are added; and estimate an increasing or decreasing trend in the input rate based on the difference between the amount of data input to the buffer in the cycle based on the reading bandwidth and the amount data read from the buffer in the cycle based on the reading bandwidth.

9 . An information processing method executed by a processor of an information processing device including a buffer that stores data blocks of a plurality of flows and from which the data blocks are sequentially read, the information processing method comprising:
monitoring an input rate that is a sum of data amounts of the plurality of flows input to the buffer per unit of time; and suppress flowing of a data block into the buffer for one or more of the plurality of flows based on a result of monitoring the input rate.

10 . An information processing device comprising:
a plurality of policers that control the output of input data blocks using token buckets, each of which has a maximum value of tokens capable of being accumulated; a buffer that collects the data blocks output from the plurality of policers and outputs the data blocks; and a plurality of processors included in the plurality of policers and configured to control the maximum values of tokens capable of being accumulated in the token buckets based on a burst occurrence state and an input rate that is the amount of data to be input to the buffer per unit of time.

11 . The information processing device according to claim 10 ,
wherein each of the processors controls the maximum value of tokens capable of being accumulated in a respective one of the token buckets, based on the input rate, an increasing or decreasing trend in the input rate, a reading bandwidth indicating the amount of data capable of being read from the buffer per unit of time, and the burst occurrence state.

12 . The information processing device according to claim 11 ,
wherein each of the processors reduces the maximum value of tokens capable of being accumulated in a respective one of the token buckets to a predetermined value when the input rate is higher than a first threshold equal to or lower than the reading bandwidth.

13 . The information processing device according to claim 12 ,
wherein each of the processors reduces the maximum value of tokens capable of being accumulated in a respective one of the token buckets to a predetermined value when the input rate is equal to or higher than a second threshold larger than the first threshold and equal to or lower than the reading bandwidth and tends to increase.

14 . The information processing device according to claim 11 ,
wherein each of the processors reduces the maximum value of tokens capable of being accumulated in a respective one of the token buckets to a predetermined value when the input rate is higher than the reading bandwidth and tends to be maintained.

15 . The information processing device according to claim 11 ,
wherein each of the processors increases the maximum value of tokens capable of being accumulated in a respective one of the token buckets to a predetermined value based on the reading bandwidth, the input rate, the amount of data existing in the buffer, and an increasing or decreasing trend in the input rate.

16 . The information processing device according to claim 10 , wherein each of the processors is configured to:
monitor the amount of tokens accumulated in a respective one of the token buckets; and determine that a burst has occurred, based on the amount of tokens accumulated in a respective one of the token buckets.

17 . The information processing device according to claim 16 , wherein each of the processors is configured to:
determine that a burst has occurred, based on one or more of the amount of an excess token when the amount of tokens added to a respective one of the token buckets in a predetermined cycle exceeds the maximum value of tokens capable of being accumulated in the token bucket within a predetermined time period, the amount of data discarded within the predetermined time period or the number of times that dat

Assignees

• Fujitsu Ltd

Inventors

• Noguchi Tsutomu
• Noguchi Toshihiro
• Kida Toshimi
• Fukuda Naoki
• Kawasaki Naoki
• Maehara Akikazu
• Kasa Masamichi

Classifications

• G06F13/4027 Primary

  using bus bridges (G06F13/4022 takes precedence) · CPC title

• G06F13/28

  using burst mode transfer, e.g. direct memory access {DMA}, cycle steal (G06F13/32 takes precedence) · CPC title