Patents by Inventor Glenn Gracon
Glenn Gracon 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: 7697430Abstract: A packet scheduler includes a packet manager interface, a policer, a congestion manager, a scheduler, and a virtual output queue (VOQ) handler. The policer assigns a priority to each packet. Depending on congestion levels, the congestion manager determines whether to send a packet based on the packet's priority assigned by the policer. The scheduler schedules packets in accordance with configured rates for virtual connections and group shapers. A scheduled packet is queued at a virtual output queue (VOQ) by the VOQ handler. In one embodiment, the VOQ handler sends signals to a packet manager (through the packet manager interface) to instruct the packet manager to transmit packets in a scheduled order.Type: GrantFiled: August 29, 2005Date of Patent: April 13, 2010Assignee: Tellabs San Jose, Inc.Inventors: Glenn Gracon, Murray Bowles, Kenneth C. Hsu, David Curry
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Publication number: 20090086628Abstract: A packet scheduler includes a packet manager interface, a policer, a congestion manager, a scheduler, and a virtual output queue (VOQ) handler. The policer assigns a priority to each packet. Depending on congestion levels, the congestion manager determines whether to send a packet based on the packet's priority assigned by the policer. The scheduler schedules packets in accordance with configured rates for virtual connections and group shapers. A scheduled packet is queued at a virtual output queue (VOQ) by the VOQ handler. In one embodiment, the VOQ handler sends signals to a packet manager (through the packet manager interface) to instruct the packet manager to transmit packets in a scheduled order.Type: ApplicationFiled: August 29, 2005Publication date: April 2, 2009Inventors: Glenn Gracon, Murray Bowles, Kenneth C. Hsu, David Curry
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Patent number: 6987732Abstract: A packet scheduler includes a packet manager interface, a policer, a congestion manager, a scheduler, and a virtual output queue (VOQ) handler. The policer assigns a priority to each packet. Depending on congestion levels, the congestion manager determines whether to send a packet based on the packet's priority assigned by the policer. The scheduler schedules packets in accordance with configured rates for virtual connections and group shapers. A scheduled packet is queued at a virtual output queue (VOQ) by the VOQ handler. In one embodiment, the VOQ handler sends signals to a packet manager (through the packet manager interface) to instruct the packet manager to transmit packets in a scheduled order.Type: GrantFiled: December 15, 2000Date of Patent: January 17, 2006Assignee: Tellabs San Jose, Inc.Inventors: Glenn Gracon, Murray Bowles, Kenneth C. Hsu, David Curry
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Patent number: 6819327Abstract: A signature capture and analysis system suitable for use in a high performance computer graphics system is described. The system employs a distributed network of signature analysis registers (SARs) which may be configured to capture and accumulate information from one or more channels of data over pre-defined periods of time. The SARs may be so distributed to allow for the isolation of faults to a sub-system level. The signature values developed in these SARs are, in some cases pre-seeded, and may include contributions from both data and control signals. Checking of the signature values against known good or expected outcomes is provided for. In some cases the SARs may be implemented as linear hybrid cellular automatons.Type: GrantFiled: May 18, 2001Date of Patent: November 16, 2004Assignee: Sun Microsystems, Inc.Inventors: Michael A. Wasserman, Steven Te-Chun Yu, Justin M. Mahan, Michael W. Schimpf, Glenn Gracon
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Patent number: 6670959Abstract: A graphics system that may be shared between multiple display channels includes a frame buffer, an arbiter, and two pixel output buffers. The arbiter arbitrates between the display channels' requests for display information from the frame buffer and forwards a selected request to the frame buffer. The frame buffer is divided into a first and a second portion. The arbiter alternates display channel requests for data between the first and second portions of the frame buffer. The frame buffer outputs display information in response to receiving the forwarded request, and pixels corresponding to this display information are stored in the output buffers. The arbiter selects which request to forward to the frame buffer based on a relative state of neediness of each of the requesting display channels.Type: GrantFiled: May 18, 2001Date of Patent: December 30, 2003Assignee: Sun Microsystems, Inc.Inventors: Michael A. Wasserman, Michael G. Lavelle, David C. Kehlet, Glenn Gracon
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Patent number: 6654021Abstract: A graphics system that may be shared between multiple display channels includes a frame buffer, two arbiters, a pixel buffer, and several display output queues. The first arbiter arbitrates between the display channels' requests for display information from the frame buffer and forwards a selected request to the frame buffer. The frame buffer outputs display information in response to receiving the forwarded request, and pixels corresponding to this display information are stored in the pixel buffer. Each display channel has a corresponding display output queue that provides data to a display and generates a request for pixels from the pixel buffer. A pixel request arbiter receives the pixel requests generated by the display output queues, selects one of the pixel requests, and forwards the selected request to the pixel buffer. In response, the pixel buffer outputs pixels to the display output queue that generated the selected pixel request.Type: GrantFiled: May 18, 2001Date of Patent: November 25, 2003Assignee: Sun Microsystems, Inc.Inventors: Michael A. Wasserman, Michael G. Lavelle, David C. Kehlet, Nathaniel David Naegle, Steven Te-Chun Yu, Glenn Gracon
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Publication number: 20030048276Abstract: A signature capture and analysis system suitable for use in a high performance computer graphics system is described. The system employs a distributed network of signature analysis registers (SARs) which may be configured to capture and accumulate information from one or more channels of data over pre-defined periods of time. The SARs may be so distributed to allow for the isolation of faults to a sub-system level. The signature values developed in these SARs are, in some cases pre-seeded, and may include contributions from both data and control signals. Checking of the signature values against known good or expected outcomes is provided for. In some cases the SARs may be implemented as linear hybrid cellular automatons.Type: ApplicationFiled: May 18, 2001Publication date: March 13, 2003Applicant: Sun Microsystems, Inc.Inventors: Michael A. Wasserman, Steven Te-Chun Yu, Justin M. Mahan, Michael W. Schimpf, Glenn Gracon
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Publication number: 20030043155Abstract: A graphics system that may be shared between multiple display channels includes a frame buffer, two arbiters, a pixel buffer, and several display output queues. The first arbiter arbitrates between the display channels' requests for display information from the frame buffer and forwards a selected request to the frame buffer. The frame buffer outputs display information in response to receiving the forwarded request, and pixels corresponding to this display information are stored in the pixel buffer. Each display channel has a corresponding display output queue that provides data to a display and generates a request for pixels from the pixel buffer. A pixel request arbiter receives the pixel requests generated by the display output queues, selects one of the pixel requests, and forwards the selected request to the pixel buffer. In response, the pixel buffer outputs pixels to the display output queue that generated the selected pixel request.Type: ApplicationFiled: May 18, 2001Publication date: March 6, 2003Applicant: Sun Microsystems, Inc.Inventors: Michael A. Wasserman, Michael G. Lavelle, David C. Kehlet, Nathaniel David Naegle, Steven Te-Chun Yu, Glenn Gracon
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Publication number: 20030043158Abstract: A graphics system that may be shared between multiple display channels includes a frame buffer, an arbiter, and two pixel output buffers. The arbiter arbitrates between the display channels' requests for display information from the frame buffer and forwards a selected request to the frame buffer. The frame buffer is divided into a first and a second portion. The arbiter alternates display channel requests for data between the first and second portions of the frame buffer. The frame buffer outputs display information in response to receiving the forwarded request, and pixels corresponding to this display information are stored in the output buffers. The arbiter selects which request to forward to the frame buffer based on a relative state of neediness of each of the requesting display channels.Type: ApplicationFiled: May 18, 2001Publication date: March 6, 2003Inventors: Michael A. Wasserman, Michael G. Lavelle, David C. Kehlet, Glenn Gracon
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Publication number: 20020110134Abstract: A packet scheduler includes a packet manager interface, a policer, a congestion manager, a scheduler, and a virtual output queue (VOQ) handler. The policer assigns a priority to each packet. Depending on congestion levels, the congestion manager determines whether to send a packet based on the packet's priority assigned by the policer. The scheduler schedules packets in accordance with configured rates for virtual connections and group shapers. A scheduled packet is queued at a virtual output queue (VOQ) by the VOQ handler. In one embodiment, the VOQ handler sends signals to a packet manager (through the packet manager interface) to instruct the packet manager to transmit packets in a scheduled order.Type: ApplicationFiled: December 15, 2000Publication date: August 15, 2002Inventors: Glenn Gracon, Murray Bowles, Kenneth C. Hsu, David Curry