International Business Machines Corporation

Igor I Ageyev

Joseph M Swingler

Thomas W Bish

Gary Anna

Sangram Singh Ghoman

Jonathan Michael Hale

Kimberly A Bortz

Gregory Tad Kishi

Russell Lee Lewis

Lih-Chung Kuo

A method for throttling host throughput in a computer storage subsystem is provided. The host throughput is compared to a throughput limit for a predetermined time period. If the host throughput exceeds the throughput limit during the predetermined time period, an input/output (I/O) delay is set equal to the remainder of the predetermined time period, and the delay is implemented for an associated storage device of the computer storage subsystem.

System and method for throttling host throughput

A method for controlling the throughput in a communications channel between a host and its storage subsystem is disclosed. A determination is made whether or not a total throughput value is greater than a predetermined maximum throughput value. If the total throughput value is greater than the predetermined maximum throughput value, a delay is applied to the communications channel. If the total throughput value is not greater than the predetermined maximum throughput value, another determination is made whether or not one time period has completed. If one time period has completed, a total throughput value and an exponential moving average (EMA) throughput value of the communications channel is retrieved, a new EMA throughput value is generated based on the total throughput value and the EMA throughput value, and adjusting the total throughput value based on whether or not the new throughput value is greater than a predetermined maximum throughput value.

Method for controlling host throughput to a computer storage subsystem

A method to generate a formatted trace for a second device embedded in a first device. The method provides source code comprising a trace entry, compiles that source code to form an embedded device code image comprising a trace description string and a trace description string address, and assigns the trace description string address as the traceId. The method creates a database comprising the trace description string and the trace description string address. The method uploads to the second device the embedded device code image, and generates trace data using that stripped code. The method then downloads that trace data to the first device, merges that trace data with the database, and forms a formatted trace.

Method to generate a formatted trace for an embedded device

A device, system and method of data compression are provided. The invention includes a receiving module that may be a memory module. The invention also includes a pointer module storing a pointer to a location within the receiving module. The invention allocates a receiving space within the receiving module and associates the pointer with the receiving space. The pointer may be associated with the beginning of the receiving space. The invention compresses a first data block and directs the compressed first data block to the receiving space at the location indicated by the pointer. The invention further associates the pointer with the location in the receiving space contiguous with the received compressed first data block. The invention compresses a second data block and directs the compressed second data block to the location within the receiving space indicated by the pointer. The invention compresses data as contiguous compressed data blocks.

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Tucson, AZ, United States of America

Igor I Ageyev