Hewlett-Packard Development Company, L.p.

Aswin Chandramouleeswaran

Steven T Roth

C P Vijay Kumar

Lisa M Nishiyama

Harshavardhan R Kuntur

Daniel R Mathias

Naomi A Munekawa

Sherin Thyil George

Douglas K Eldred

Rakesh Sasidharan Nair

Arun Krishna

Method to selectively assign a reduced busy-wait time to threads is described. The method comprises determining whether at least one thread is spinning on a mutex lock associated with a condition variable and assigning, when the at least one thread is spinning on the mutex lock, a predetermined reduced busy-wait time for a subsequent thread spinning on the mutex lock.

Busy-wait time for threads

A user-defined tunable, and an apparatus and a method for creating the user-defined tunable, are described. The user-defined tunable includes a tunable name, an assigned value, and an expression that relates the user-defined tunable to one or more kernel tunables. The kernel tunables have parameter values defined by the expression, and a change to the expression changes the parameter values of the kernel tunables.

Apparatus and method for user-defined tunables

One embodiment disclosed relates to a method of automated registry clean-up for an operating system of a computer system. Interfaces on which each module depends is determined, and a module is marked as obsolete if the module depends on an interface that is non-existent in the operating system. Configuration data is removed from a system registry for modules marked as obsolete. Other embodiments are also disclosed.

Method and apparatus for automated registry clean-up

Systems, methods, and devices are provided for kernel configurations. One embodiment includes a kernel configuration tool, a system file accessible by the kernel configuration tool, and means for recovering kernel configurations without the use of a manually creating a 'known good post update' kernel configuration.

Kernel configuration recovery

Systems, methods, and devices are provided for kernel configurations. One embodiment includes a kernel configuration tool, a system file accessible by the kernel configuration tool, and means for automatically detecting and moving a kernel configuration in association with boot and shutdown routines.

Moving kernel configurations

Systems, methods, and devices are provided for transactional kernel configuration. One embodiment includes a kernel configuration tool, a system file accessible by the kernel configuration tool, and program instructions executable by the kernel configuration tool to immediately and persistently apply kernel configuration changes a manner that ensures a transactional kernel configuration change.

Transactional kernel configuration

A method, and a corresponding mechanism, are used for generating and managing multiple saved kernel configurations. The method includes retrieving an existing kernel configuration, applying a kconfig command, by which a second kernel configuration is generated, and saving the second kernel configuration.

Multiple saved kernel configurations

A method for operating a computing apparatus includes specifying proposed changes to a plurality of tunable parameters of tunable kernel modules determining whether application of the changes would violate a set of constraints; and effectuating either none or all of the changes depending upon whether the changes were determined to violate any or none of the constraints, respectively.

Growing community of inventors

Santa Clara, CA, United States of America

Aswin Chandramouleeswaran