Patents by Inventor Jonathan James Davies
Jonathan James Davies has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12147844Abstract: In some aspects, a non-transitory computer readable storage medium includes instructions stored thereon that, when executed by a processor, cause the processor to detect that system software is proceeding to swap memory content of a virtual machine (VM) from memory to storage, wherein the memory is allocated to the VM; buffer the memory content; and perform alternative memory reclamation of the memory.Type: GrantFiled: March 4, 2021Date of Patent: November 19, 2024Assignee: Nutanix, Inc.Inventors: Carl Alan Waldspurger, Florian Anselm Johannes Schmidt, Jonathan James Davies
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Patent number: 11899572Abstract: In some aspects, a non-transitory computer readable storage medium includes instructions stored thereon that, when executed by a processor, cause the processor to create a virtual swap space that is exposed to a core system software, intercept a first page selected by the core system software to be swapped out to the virtual swap space, map the virtual swap space to a physical swap space that is allocated to a type of page associated with first swap metadata, and write the first page to the physical swap space based on the first page having the first swap metadata. In some embodiments, the first page is associated with the first swap metadata.Type: GrantFiled: September 9, 2021Date of Patent: February 13, 2024Assignee: Nutanix, Inc.Inventors: Carl Alan Waldspurger, Florian Anselm Johannes Schmidt, Jonathan James Davies, Ivan Teterevkov, Christopher Joel Riches
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Patent number: 11816498Abstract: Various embodiments disclosed herein are related to a non-transitory computer readable storage medium. In some embodiments, the medium includes instructions stored thereon that, when executed by a processor, cause the processor to receive, from a user-space application, a request to detect swapping activity satisfying a threshold condition, detect the swapping activity satisfying the threshold condition, and, in response to occurrence of the threshold condition, send a response that indicates that the swapping activity satisfies the threshold condition.Type: GrantFiled: January 21, 2021Date of Patent: November 14, 2023Assignee: Nutanix, Inc.Inventors: Carl Alan Waldspurger, Florian Anselm Johannes Schmidt, Jonathan James Davies
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Publication number: 20230115604Abstract: Methods, systems, and computer code for CPU-oblivious replication of memory of a virtual machine from one computing node to another computing node over PCIe hardware. A source virtual machine is designated to be replicated from a source computing node of a multi-node computing cluster to a target computing node of the multi-node computing cluster. When a CPU of the source computing node decodes an instruction that causes a change to contents of a memory location of the source virtual machine, the changed contents of the memory location is copied into a memory address of a target virtual machine by using hardware capabilities of two or more PCIe devices to synchronously clone data from the source computing node to the target computing node. The CPU of the source computing node obliviously waits to execute a further instruction of the source virtual machine until accomplishment of the cloned memory WRITE transaction.Type: ApplicationFiled: March 31, 2022Publication date: April 13, 2023Applicant: Nutanix, Inc.Inventors: Felipe Franciosi, Jonathan James Davies
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Publication number: 20230071475Abstract: In some aspects, a non-transitory computer readable storage medium includes instructions stored thereon that, when executed by a processor, cause the processor to create a virtual swap space that is exposed to a core system software, intercept a first page selected by the core system software to be swapped out to the virtual swap space, map the virtual swap space to a physical swap space that is allocated to a type of page associated with first swap metadata, and write the first page to the physical swap space based on the first page having the first swap metadata. In some embodiments, the first page is associated with the first swap metadata.Type: ApplicationFiled: September 9, 2021Publication date: March 9, 2023Applicant: Nutanix, Inc.Inventors: Carl Alan Waldspurger, Florian Anselm Johannes Schmidt, Jonathan James Davies, Ivan Teterevkov, Christopher Joel Riches
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Publication number: 20220283873Abstract: In some aspects, a non-transitory computer readable storage medium includes instructions stored thereon that, when executed by a processor, cause the processor to detect that system software is proceeding to swap memory content of a virtual machine (VM) from memory to storage, wherein the memory is allocated to the VM; buffer the memory content; and perform alternative memory reclamation of the memory.Type: ApplicationFiled: March 4, 2021Publication date: September 8, 2022Applicant: Nutanix, Inc.Inventors: Carl Alan Waldspurger, Florian Anselm Johannes Schmidt, Jonathan James Davies
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Publication number: 20220229684Abstract: Various embodiments disclosed herein are related to a non-transitory computer readable storage medium. In some embodiments, the medium includes instructions stored thereon that, when executed by a processor, cause the processor to receive, from a user-space application, a request to detect swapping activity satisfying a threshold condition, detect the swapping activity satisfying the threshold condition, and, in response to occurrence of the threshold condition, send a response that indicates that the swapping activity satisfies the threshold condition.Type: ApplicationFiled: January 21, 2021Publication date: July 21, 2022Applicant: Nutanix, Inc.Inventors: Carl Alan Waldspurger, Florian Anselm Johannes Schmidt, Jonathan James Davies
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Patent number: 8699300Abstract: A method of underwater communication between a link initiator and a link receptor, by transmitting a link acquisition waveform from the initiator to the receptor, and establishing communications channel parameters from such a received waveform. Data is then transmitted according to these parameters, which may include range, direction, frequency band and Doppler, with greater efficiency and robustness.Type: GrantFiled: August 26, 2008Date of Patent: April 15, 2014Assignee: Atlas Electronik UK LimitedInventors: Jonathan James Davies, Shaun Michael Dunn
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Publication number: 20110128822Abstract: A method of underwater communication between a link initiator and a link receptor, by transmitting a link acquisition waveform from the initiator to the receptor, and establishing communications channel parameters from such a received waveform. Data is then transmitted according to these parameters, which may include range, direction, frequency band and Doppler, with greater efficiency and robustness.Type: ApplicationFiled: August 26, 2008Publication date: June 2, 2011Applicant: ATLAS ELEKTRONIK UK LIMITEDInventors: Jonathan James Davies, Shaun Michael Dunn
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Patent number: 7904888Abstract: A method of obtaining trace data with respect to a running software program includes accessing a method in a call stack, the call stack including a sequentially ordered list of methods called during the running of the software program. If the accessed method in the call stack falls between a minimum trace offset and a maximum trace offset where the minimum trace offset and the maximum trace offset define a trace window, obtaining trace data for the method and outputting it to an output stream which is then collected into a trace data storage. If the trace data in the trace data storage meets predetermined adaptation rules then changing the position in the call stack of at least one of the minimum trace offset and the maximum trace offset.Type: GrantFiled: March 4, 2004Date of Patent: March 8, 2011Assignee: International Business Machines CorporationInventors: Robert Francis Berry, Matthew Alexander Webster, Nicholas Harry Huismans, Jonathan James Davies
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Patent number: 7304911Abstract: Measuring apparatus for providing information on the relative location of a target site which is radiating a target signal that includes a predetermined pulse signal, comprises receiver means for providing a pair of temporally spaced output pulses in response to a single received said predetermined pulse signal and cross-correlation means coupled to said receiver means for cross-correlating said pair of output pulses or signals derived therefrom.Type: GrantFiled: September 17, 2003Date of Patent: December 4, 2007Assignee: Qinetiq LimitedInventors: Jonathan James Davies, Shaun Michael Dunn, Peter James Rapson, Stephen Arthur Pointer
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Patent number: 7006407Abstract: For digital underwater transmission an information sequence (17) of digital bits is partitioned into a succession of symbols each comprising n bits where n is equal to or greater than one (2n potential symbols), each symbol (19) is replaced (20) a corresponding base code sequence of length m bits and the result (21) is passed to an acoustic transducer after bi-phase modulation (22) on a carrier. The code has good correlation properties, e.g. a pseudo-random maixmal length sequence, a Gold code or a Kasami code, and the value of m/n is at least (32). Preferably the base sequence is cyclically extended at one or both ends prior to modulation, and Solomon Reed redundancy coding (18) is initially applied to the information sequence. The output (23) of modulator (22) may be prefaced (26) by a pair of chirp waveforms (24). Provision is made for Doppler and multi-path correction.Type: GrantFiled: March 28, 2002Date of Patent: February 28, 2006Assignee: Qinetiq LimitedInventors: Jonathan James Davies, Shaun Michael Dunn, Stephen Arthur Pointer, Samuel William Downer
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Patent number: 6980487Abstract: In a digital acoustic transmission device in which a digital sequence (31) is electrically modulated (22) on a carrier cos ?t, the modulated carrier (23) is prefaced with at least two pulse signals (24) of known timing relative to each other and to the modulated digital sequence to provide an output signal (13) for acoustic transmission. The pulse signals indicate to receiver the start of a transmission, and contain Doppler information for resampling the modulated signal prior to demodulation. Where the information sequence is in encoded blocks of equal length, the relationship between successive blocks can be used to update the Doppler information for use with the following block. Channel information can also be derived from the pulse signals and/or blocks for raking the next part of the incoming signal. Preferably the pulse signals have good correlation characteristics. In the embodiments the pulse signals are an immediately successive identical pair of linearly rising chirps.Type: GrantFiled: March 28, 2002Date of Patent: December 27, 2005Assignee: Qinetiq LimitedInventors: Jonathan James Davies, Shaun Michael Dunn, Stephen Arthur Pointer, Samuel William Downer
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Publication number: 20040250242Abstract: A method of obtaining trace data with respect to a running software program includes accessing a method in a call stack, the call stack including a sequentially ordered list of methods called during the running of the software program. If the accessed method in the call stack falls between a minimum trace offset and a maximum trace offset where the minimum trace offset and the maximum trace offset define a trace window, obtaining trace data for the method and outputting it to an output stream which is then collected into a trace data storage. If the trace data in the trace data storage meets predetermined adaptation rules then changing the position in the call stack of at least one of the minimum trace offset and the maximum trace offset.Type: ApplicationFiled: March 4, 2004Publication date: December 9, 2004Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Robert Francis Berry, Matthew Alexander Webster, Nicholas Harry Huismans, Jonathan James Davies
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Publication number: 20040105344Abstract: For digital underwater transmission an information sequence (17) of digital bits is partitioned into a succession of symbols each comprising n bits where n is equal to or greater than one (2n potential symbols), each symbol (19) is replaced (20) with a corresponding base code sequence of length m bits and the result (21) is passed to an acoustic transducer after bi-phase modulation (22) on a carrier. The code has good correlation properties, e.g. a pseudo-random maixmal length sequence, a Gold code or a Kasami code, and the value of m/n is at least (32). Preferably the base sequence is cyclically extended at one or both ends prior to modulation, and Solomon Reed redundancy coding (18) is initially applied to the information sequence. The output (23) of modulator (22) may be prefaced (26) by a pair of chirp waveforms (24). Provision is made for Doppler and multi-path correction.Type: ApplicationFiled: October 1, 2003Publication date: June 3, 2004Inventors: Jonathan James Davies, Shaun Michael Dunn, Stephen Arthur Pointer, Samuel William Downer
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Publication number: 20040090865Abstract: In a digital acoustic transmission device in which a digital information sequence (31) is electrically modulated (22) on a carrier cos &ohgr;t, the modulated carrier (23) is prefaced with at least two pulse signals (24) of known timing relative to each other and to the modulated digital sequence to provide an output signal (13) for acoustic transmission. The pulse signals indicate to receiver the start of a transmission, and contain Doppler information for resampling the modulated signal prior to demodulation. Where the information sequence is in encoded blocks of equal length, the relation between successive blocks can be used to update the Doppler information for use with a following block. Channel information can also be derived from the pulse signals and/or blocks for raking the next part of the incoming signal. Preferably the pulse signals have good correlation characteristics. In the embodiments the pulse signals are an immediately successive identical pair of linearly rising chirps.Type: ApplicationFiled: September 30, 2003Publication date: May 13, 2004Inventors: Jonathan James Davies, Shaun Michael Dunn, Stephen Arthur Pointer, Samuel William Downer
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Patent number: 6497054Abstract: Solid material, e.g., coal, is upgraded, e.g., the water content reduced and the BTU value increased, by a method comprising the steps of: (a) supplying the solid material to a reactor; (b) heating the solid material in the reactor under water saturation pressure conditions and removing water from the solid material; and (c) cooling the solid material by depressurising the solid material under water saturation conditions.Type: GrantFiled: September 26, 2001Date of Patent: December 24, 2002Assignee: Technological Resources Pty. Ltd.Inventors: Mark Howard Davies, Jonathan James Davis, Jared Michael Osborne
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Publication number: 20020079273Abstract: Solid material, e.g., coal, is upgraded, e.g.Type: ApplicationFiled: September 26, 2001Publication date: June 27, 2002Inventors: Mark Howard Davies, Jonathan James Davis, Jared Michael Osborne
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Patent number: 5772042Abstract: A method for the flotation processing of mineral ores is disclosed. At least one collector is introduced into the flotation process by atomization. In a preferred aspect of the invention, the collector is provided as a mixture of the thiol and corresponding oxidized thiol (e.g., a dithiol).Type: GrantFiled: December 18, 1995Date of Patent: June 30, 1998Assignee: University of QueenslandInventors: Mark Cleeton Nott, Jonathan James Davies, Emmanuel Manlapig