International Business Machines Corporation

Lenovo (singapore) Pte. Ltd.

Kavana Nandikur Bhat

Shajith Chandran

Sivakumar Krishnasamy

Prateek Goel

Muthulakshmi Pearl Srinivasan

Nitin Kumar

Basu Vaidyanathan

Sameer K Sinha

Embodiments of the present invention provide a system and method for a dynamic tracing framework for debugging in a virtualized environment. Embodiment of the present invention can include selecting a home node and a set of remote nodes to which apply a set of probes. Data collection is performed by a tracing agent of each node and the collection of data is shared across multiple software systems.

Dynamic tracing framework for debugging in virtualized environments

A load store advisory program sets a breakpoint within a load-store sequence of a program, determines if the breakpoint will cause unexpected behavior, and generates a warning if it is determined that the breakpoint will cause unexpected behavior. The unexpected behavior may be the result of setting a breakpoint within a load-store sequence that, because of the breakpoint, will repeatedly fail.

Advisory warning and workaround indications to user when stopped between load and store conditional instructions while using source level debuggers

A computer-implemented method for lock-free use of a non-preemptive system resource by a preemptive thread, which may be interrupted. The method comprises registering a non-preemptive system resource and a first level reclaim handler for the non-preemptive system resource with the kernel of an operating system, registering a second level reclaim handler with the kernel, wherein the second level reclaim handler is included in an application program, and running the application program as a preemptive thread using the non-preemptive system resource. The first level reclaim handler is code that is a part of the implementation of the non-preemptive system resource in the kernel. The second level reclaim handler is code that is part of the application and is registered with the kernel before the application uses the non-preemptive system resource. The method enables a preemptive thread using a non-preemptive system resource to be preempted without crashing.

Lock free use of non-preemptive system resource

An apparatus, system, and method are disclosed for probing a computer process. A probe parameter module determines a process identifier, a probe interval, and a probe action. The process identifier uniquely identifies a computer process. A start timer module starts a timer with a timer interval in response to the computer process entering an executing state on a processor core. The timer interval is based on the probe interval and on an amount of time elapsed between a probe start time and the computer process entering the executing state on the processor core. An action module executes the probe action in response to the timer satisfying the timer interval while the computer process is in the executing state on the processor core.

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Bengaluru, India

Kavana Nandikur Bhat