International Business Machines Corporation

Globalfoundries Inc.

Richard Nigel Chamberlain

Adam J Pilkington

Howard J Hellyer

Matthew Francis Peters

Gordon Douglas Hutchison

Blazej Czapp

A system and related method for managing memory in data processing comprises allocating each of a plurality of application containers a respective portion of a memory communicatively coupled to a plurality of processing units. The method further comprises allocating each of the plurality of application containers a respective group of the plurality of processing units and allocating, to each of the plurality of application containers, nursery and tenured heap spaced in the memory. The method then comprises performing, responsive to a request from an application container, garbage collection from the nursery and tenured heap spaces allocated to the application container.

Data processing for allocating memory to application containers

Embodiments of the present invention provide methods, computer program products, and systems. One example comprises monitoring traffic between a plurality of microservices to determine a property of the traffic. Embodiments of the present invention can then, based on the determined property of the monitored traffic, relocate each of the plurality of microservices from its respective origin resource to a shared resource.

Managing communication between microservices

A method for debugging asynchronous functions in a computer system that implements a runtime stack when executing a program includes, in response to an asynchronous called function being invoked by a calling function of a first execution thread, copying active stack frames of the runtime stack and storing the copied active stack frames as a duplicate stack.

Debugging asynchronous functions

Embodiments described herein provide a method, system, and computer readable medium configured to analyze a heap following a core dump is disclosed herein. The method begins by generating the core dump responsive to an occurrence of an event in a run-time environment. The core dump contains the contents of a heap at a moment in time that the event occurred. The processor analyzes the heap in the run-time environment using a first heap analysis method at a first starting point in the heap. The heap includes one or more slots. Each slot contains one or more objects. The processor analyzes the contents of the heap specified by the core dump using a second heap analysis method at a second starting point in the heap, responsive to determining that a first slot is not reachable.

Accessing damaged heaps using combined linear heap slot based and object graph walking

A method captures diagnostic trace information in a computer system having a plurality of software images. Information is received that is associated with a first failure in a first one of the plurality of software images. The received information is distributed to others of the plurality of software images. Further information is captured that is associated with a second failure in another one of the plurality of software images. The information associated with a first failure in a first one of said plurality of software images is combined with the information associated with a second failure in another of said plurality of software images, and the combined information is analyzed in order to determine a cause of the first failure.

Second failure data capture in co-operating multi-image systems

Analyzing a managed runtime cache is provided. A heap associated with a managed runtime environment, where the heap includes an N-generation cache or a plurality of objects associated with a program operating within a managed runtime environment is identified. A snapshot of the heap is produced, wherein the snapshot identifies a memory location for each object of the plurality of objects at which the object is stored. A generation of each of the plurality of objects based, at least in part, on the memory location of the object is determined. One or more suggestions based, at least in part, on the memory location of the plurality of objects is provided.

Managed runtime cache analysis

A computer system and computer program captures diagnostic trace information in a computer system having a plurality of software images. Information is received that is associated with a first failure in a first one of the plurality of software images. The received information is distributed to others of the plurality of software images. Further information is captured that is associated with a second failure in another one of the plurality of software images. The information associated with a first failure in a first one of said plurality of software images is combined with the information associated with a second failure in another of said plurality of software images, and the combined information is analyzed in order to determine a cause of the first failure.

A list of classes found in a core dump file is determined. One or more classes requested by a classloader is also determined. A set of one or more classes requested by the classloader that are found in the core dump file is then determined.

Using core files to develop diagnostic programs

A method, apparatus, computer program and computer program product for processing core data produced by a computer process to identify data relevant to the computer process, the method comprising the steps of: identifying core data for a computer process; identifying trace data comprising sequential trace entries for the computer process; selecting a predetermined number of most recent entries in the trace data; identifying any references to a memory address in each selected trace data entry; dereferencing each identified memory address in the core data; and extracting the data from the dereferenced memory location in the core data.

Processing core data produced by a computer process

A method for managing concurrent system dumps of address spaces of memory of a computing system. The method comprises analyzing address space of memory to determine high priority areas and low priority areas of the address space. The method further comprises stopping all application threads of memory. In addition, the method further comprises performing a system dump of all the high priority areas of the address space. Moreover, the method further comprises initiating a background thread that performs a system dump of the low priority areas in background of the address space, and allowing, by the one or more computer processors, all of the application threads of memory to restart.

Concurrent dumping of large address space

A method for creating diagnostic files that includes receiving an error notification indicating that an error has occurred in a particular system section of a system that has a plurality of system sections. The error notification includes information about the error. A diagnostic file that includes a summarized error report of the particular system section is created based on the information included in the error notification. The diagnostic file is saved.

Growing community of inventors

Hursley, United Kingdom

Richard Nigel Chamberlain