International Business Machines Corporation

Globalfoundries U.S. 2 LLC

Matthew Ryan Ochs

Omar Cardona

James Brian Cunningham

Baltazar De Leon, Iii

Vikramjit Sethi

Douglas J Griffith

Angela Astrid Jaehde

Dimpu K Nath

Perinkulam I Ganesh

Rakesh Sharma

Brendan M Wong

Amanda A Liem

Lennard G Streat

Bret Ronald Olszewski

Dirk Michel

Vishal Ramachandra Mansur

Vishal R Mansur

Chidambar Y Kulkarni

Jiandi A An

Ramana R Machireddy

Kent E Yoder

Perinkulum I Ganesh

In a computing system, an application thread is executed on a hardware thread. Based on a configuration of the computing system, a first threshold is determined comprising a threshold percentage of execution time spent servicing a set of interrupts to the application thread relative to a total execution time for the hardware thread. For the hardware thread, a length of a first time period spent servicing an interrupt in the set of interrupts and a length of a second time period spent executing the application thread are measured. A cumulative percentage of execution time spent in the first time period relative to execution time spent in the first time period and the second time period is calculated. Responsive to the cumulative percentage being above the threshold percentage, interrupt servicing on the hardware thread is disabled.

Suppressing interrupts to an application thread

Various systems, processes, and products may be used to filter multicast messages in virtual environments. In one implementation, a multicast filtering address is received by a network adapter. A frequency of use of the multicast filtering address is determined and, based on the frequency of use of the multicast filtering address, the multicast filtering address is stored in either a multicast filtering store of the network adapter or a local filtering store of a respective virtual machine.

Multicast message filtering in virtual environments

Various systems, processes, and products may be used to filter multicast messages in virtual environments. In one implementation, a multicast filtering address is received by a network adapter from at least one of a number of virtual machines. A priority of the multicast filtering address is determined and, based on the priority, the multicast filtering address is stored in either a multicast filtering store of the network adapter or a local filtering store of the at least one virtual machine.

Various systems, processes, and products may be used to filter multicast messages in virtual environments. In one implementation, a multicast filtering address is received by a network adapter from at least one of a number of virtual machines. An amount of filtering data is determined corresponding to the at least one virtual machine and, based on the amount of the filtering data corresponding to the at least one virtual machine, the multicast filtering address is stored in either a multicast filtering store of the network adapter or a local filtering store of the at least one virtual machine.

Various systems, processes, and products may be used to filter multicast messages in virtual environments. In one implementation, a multicast filtering address is received by a network adapter from at least one of a number of virtual machines of a computer system. Responsive to receiving the multicast filtering address, a determination is made whether a multicast filtering store of the network adapter is full. Responsive to determining that the multicast filtering store of the network adapter is full, the multicast filtering address is stored in a local filtering store of the at least one virtual machine.

Various systems, processes, and products may be used to filter multicast messages in virtual environments. In one implementation, hardware resources are virtualized to provide a plurality of virtual machines where a number of the virtual machines are configured to receive multicast messages. A network adapter is configured to receive a multicast filtering address from at least one of the number of virtual machines and hash the multicast filtering address to create a hash value. The hash value is linked to the virtual machine via a memory entry.

A method and technique for communications over multiple protocol interfaces in a computing environment includes identifying a first communications protocol of a network interface for ingress data packet communications. Responsive to the identified first communications protocol of the network interface differing from a second communications protocol used for the data packet communications, fragmentation data according to a data packet fragmentation protocol corresponding to the second communications protocol is derived from an application layer header of the data packet communications. A logical packet is re-assembled from the data packet communications using the data packet fragmentation protocol and the fragmentation data.

Communications over multiple protocol interfaces in a computing environment

An apparatus, method, program product, and system are disclosed for evicting pages from memory using a neural network. One embodiment of a method for evicting pages from memory using a neural network includes determining state information related to evicting pages from memory. The state information may be determined by a dedicated hardware snooping device that snoops a system bus for the state information. The method includes determining an identifier for a page in memory to be evicted using a neural network. The neural network performs machine learning operations on the state information to identify the page in memory to be evicted. The method includes locating the identified page in memory using the identifier determined by the neural network and evicting the identified page from memory.

Memory page eviction using a neural network

An apparatus, method, program product, and system are disclosed for evicting pages from memory using a neural network. A state module determines state information related to evicting pages from memory. The state information may be determined by a dedicated hardware snooping device that snoops a system bus for the state information. A learning module determines an identifier for a page in memory to be evicted using a neural network. The neural network may perform machine learning operations on the state information to identify the page in memory to be evicted. An eviction module locates the identified page in memory using the identifier determined by the neural network and evicts the identified page from memory.

Various systems, processes, and products may be used to filter multicast messages in virtual environments. In particular implementations, a system, process, and product for filtering multicast messages in virtual environments may include the ability to, responsive to receiving a multicast message including a destination address, examine a local filtering store of the network adapter for a multicast filtering address matching the destination address. The message is sent to respective virtual machines if the destination address matches the multicast filtering address found in the local filtering store for the respective virtual machines. Responsive to determining that the destination address does not match any multicast filtering address found in the local filtering store, a determination is made whether the local filtering store is full and, if so, the multicast message is dropped.

Various systems, processes, and products may be used to filter multicast messages in virtual environments. In particular implementations, a system, process, and product for filtering multicast messages in virtual environments may include the ability to determine whether a multicast message has been received, examine a local filtering store for a match for the destination address of the multicast message, and send the message to a number of virtual machines if a match for the address is found. The system, process, and product may also include the ability to analyze a filtering store of at least one of the virtual machines for a match for the address if a match is not found in the local filtering store and send the message to a number of the virtual machines if a match for the address is found in a filtering store of one of the virtual machines.

A method, system, and computer usable program product for remote device location identification are provided in the illustrative embodiments. A command to identify a remote device is received, at the remote device in a data processing environment. The command is included in a predetermined communication directed to the remote device. A determination is made whether the command is supported at the remote device. The remote device is identified by transmitting an identification of a location associated with the remote device.

Remote device location identification

Mechanisms, in a data processing system comprising a first adapter and second adapter, for performing a failover operation from the first adapter to the second adapter are provided. The mechanisms detect that an imminent failure of the first adapter is likely to occur and initiate a failover priming operation in the first adapter and second adapter in response to detecting the imminent failure. The failover priming operation configures ingress and egress buffers of the second adapter to have a similar configuration to ingress and egress buffers of the first adapter. The mechanisms migrate processing of ingress data traffic to the second adapter prior to failure of the first adapter such that the first adapter processes egress data traffic from the data processing system and the second adapter processes ingress data traffic to the data processing system.

Priming failover of stateful offload adapters

According to one aspect of the present disclosure, a system for communications over multiple protocol interfaces in a computing environment includes a processor and a memory storing interface logic executable by the processor to: identify a first communications protocol of a network interface for egress data packet communications; responsive to the identified first communications protocol of the network interface differing from a second communications protocol to be used for the data packet communications, derive fragmentation data according to a data packet fragmentation protocol corresponding to the second communications protocol; generate an application layer header for the data packet communications; store values of the fragmentation data in select fields of the application layer header; fragment the data packet communications according to the data packet fragmentation protocol; and transmit the data packet communications including the application layer header over the identified network interface.

Growing community of inventors

Austin, TX, United States of America

Matthew Ryan Ochs