Google Inc.

Ansys, Inc.

Yi Cao

Jue Wang

Andrew Christopher Walton

Norman H Chang

Deqi Zhu

Shan Wan

Gregory Thelen

James Houghton

The disclosed technology provides techniques, systems, and apparatus for proactively detecting, containing, and recovering from uncorrectable memory errors in distributed computing environment. An aspect of the disclosed technology includes scanning, by a scanner of a host machine, memory of the host machine for errors. After the scanner detects an error, the scanner may generate an error notification. The scanner may transmit the error notification to one or more processors of the host machine to implement mitigation techniques.

Memory error prevention by proactive memory poison recovery

The disclosed technology provides techniques, systems, and apparatus for containing and recovering from uncorrectable memory errors in distributed computing environment. An aspect of the disclosed technology includes a hypervisor or virtual machine manager that receives signaling of an uncorrectable memory error detected by a host machine. The virtual machine manager then uses information received via the signaling to identify virtual memory addresses or memory pages associated with the corrupted memory element so as to allow for containment and recovery from the error.

Virtual machines recoverable from uncorrectable memory errors

Computer-implemented systems and methods are provided for modeling a charge pump. A relationship between an output voltage of the charge pump and a loading condition is determined. A frequency-domain analysis is performed at multiple frequencies to determine an impedance function representative of the charge pump's impedance at each of the multiple frequencies. A vector-fitting algorithm is applied to approximate the impedance function using a plurality of poles and residues. A circuit is synthesized based on the plurality of poles and residues. A model for the charge pump is generated, where the model includes the synthesized circuit and components that model the relationship between the output voltage and the loading condition.

Low-dropout regulator and charge pump modeling using frequency-domain fitting methods

Computer-implemented systems and methods for modeling low-dropout (LDO) regulators and charge pumps are provided. A relationship between an output voltage of an LDO regulator or charge pump and a loading condition is determined. A frequency-domain analysis is performed at multiple frequencies to determine an impedance function representative of an impedance of the LDO regulator or charge pump at each of the multiple frequencies. A vector-fitting algorithm is applied to approximate the impedance function using a plurality of poles and residues. A circuit is synthesized based on the plurality of poles and residues. A model for the LDO regulator or charge pump is generated, where the model includes the synthesized circuit and components that model the relationship between the output voltage and the loading condition.

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San Jose, CA, United States of America

Yi Cao