Patent application number | Description | Published |
20090204924 | METHOD, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR FAILURE ANALYSIS IMPLEMENTING AUTOMATED COMPARISON OF MULTIPLE REFERENCE MODELS - System, method and computer program products for failure analysis implementing automated comparison of multiple reference models. An exemplary embodiment includes a method for failure analysis for an instruction set implementation in a computer system, the method including running a test-case in a first and a second model, determining if the test case failed in the first model and determining if the test case failed in the second model. | 08-13-2009 |
20090207958 | METHOD, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR AN EVEN SAMPLING SPREAD OVER DIFFERING CLOCK DOMAIN BOUNDARIES - The present invention relates to a method, computer program product and system for generating a sample signal from differing clock domain boundaries. The system comprises a cycle base component, a sample offset component being configured to receive a time-based sample pulse signal, and logic to generate a sample pulse. The sample pulse generation logic is configured to receive a time-based sample pulse signal, a free running counter value, a sample offset counter value, and deliver a sample pulse signal. | 08-20-2009 |
20090210196 | METHOD, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR EVENT-BASED SAMPLING TO MONITOR COMPUTER SYSTEM PERFORMANCE - A system, method and computer program product for event-based sampling to monitor computer system performance are provided. The system includes a sample buffer to store a sample of instrumentation data, where the instrumentation data enables measurement of computer system performance. The system also includes a sample segment selector to isolate a segment of the sample of instrumentation data as an event. The system further includes an instrumentation counter counting in response to a combination of the event and a sample pulse, and asserting a sample interrupt indicating that the sample of instrumentation data is ready to logout from the sample buffer. | 08-20-2009 |
20090210752 | METHOD, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR SAMPLING COMPUTER SYSTEM PERFORMANCE DATA - A system, method and computer program product for sampling computer system performance data are provided. The system includes a sample buffer to store instrumentation data while capturing trace data in a trace array, where the instrumentation data enables measurement of computer system performance. The system further includes a sample interrupt generator to assert a sample interrupt indicating that the instrumentation data is available to read. The sample interrupt is asserted in response to storing the instrumentation data in the sample buffer. | 08-20-2009 |
20090217012 | MICROARCHITECTURE, METHOD AND COMPUTER PROGRAM PRODUCT FOR EFFICIENT DATA GATHERING FROM A SET OF TRACE ARRAYS - An architecture for collecting performance data in a processor, that includes: a trace read control unit and a trace data collect unit, each unit coupled to a plurality of trace array and multiplex units for providing performance data, the coupling accomplished by a trace read control bus, a data select bus, a trace row address bus and a data return bus; wherein each of the trace array and multiplex units receives a trace read signal and provides data including trace data and the trace read signal to the trace data collect unit. A method and a computer program product are provided. | 08-27-2009 |
20100088444 | CENTRAL PROCESSING UNIT MEASUREMENT FACILITY - A measurement sampling facility takes snapshots of the central processing unit (CPU) on which it is executing at specified sampling intervals to collect data relating to tasks executing on the CPU. The collected data is stored in a buffer, and at selected times, an interrupt is provided to remove data from the buffer to enable reuse thereof. The interrupt is not taken after each sample, but in sufficient time to remove the data and minimize data loss. | 04-08-2010 |
20100088771 | VIRTUALIZATION OF A CENTRAL PROCESSING UNIT MEASUREMENT FACILITY - A central processing unit measurement facility is virtualized in order to support concurrent use of the facility by multiple guests executing within a virtual environment. Each guest of the environment has independent control over disablement/enablement of the facility for that guest. | 04-08-2010 |
20110029758 | CENTRAL PROCESSING UNIT MEASUREMENT FACILITY - A measurement sampling facility takes snapshots of the central processing unit (CPU) on which it is executing at specified sampling intervals to collect data relating to tasks executing on the CPU. The collected data is stored in a buffer, and at selected times, an interrupt is provided to remove data from the buffer to enable reuse thereof. The interrupt is not taken after each sample, but in sufficient time to remove the data and minimize data loss. | 02-03-2011 |
20110078419 | SET PROGRAM PARAMETER INSTRUCTION - A measurement sampling facility takes snapshots of the central processing unit (CPU) on which it is executing at specified sampling intervals to collect data relating to tasks executing on the CPU. The collected data is stored in a buffer, and at selected times, an interrupt is provided to remove data from the buffer to enable reuse thereof. The interrupt is not taken after each sample, but in sufficient time to remove the data and minimize data loss. | 03-31-2011 |
20120089816 | QUERY SAMPLING INFORMATION INSTRUCTION - A measurement sampling facility takes snapshots of the central processing unit (CPU) on which it is executing at specified sampling intervals to collect data relating to tasks executing on the CPU. The collected data is stored in a buffer, and at selected times, an interrupt is provided to remove data from the buffer to enable reuse thereof. The interrupt is not taken after each sample, but in sufficient time to remove the data and minimize data loss. | 04-12-2012 |
20120246439 | METHOD AND SYSTEM FOR MEASURING THE PERFORMANCE OF A COMPUTER SYSTEM ON A PER LOGICAL PARTITION BASIS - Disclosed are a method and system for measuring the performance of individual logical partitions of a logically partitioned computer system. Preferably, the method and system both hardware and firmware to allow measurement samples to be collected only for user specified zones of interest. In one embodiment, the method comprises the steps of specifying a Zone or Zones of interest (a Zone being a logical partition), collecting measurement samples only from the one or more specified Zones of interest, and measuring the performance of each of these Zones using only the measurement samples collected from said each of the Zones. | 09-27-2012 |
20130332709 | SET SAMPLING CONTROLS INSTRUCTION - A measurement sampling facility takes snapshots of the central processing unit (CPU) on which it is executing at specified sampling intervals to collect data relating to tasks executing on the CPU. The collected data is stored in a buffer, and at selected times, an interrupt is provided to remove data from the buffer to enable reuse thereof. The interrupt is not taken after each sample, but in sufficient time to remove the data and minimize data loss. | 12-12-2013 |
20130339626 | PRIORITIZING REQUESTS TO MEMORY - According to an embodiment, a computer system for cache management includes a processor and a cache, the computer system configured to perform a method including receiving a first store request for a first address in the cache and receiving a first fetch request for the first address in the cache. The method also includes executing the first store request and the first fetch request, latching the first store request in a store write-back pipeline in the cache, detecting, in the processor, a conflict following execution of the first store request and the first fetch request and receiving the first store request from a recycle path including the store write-back pipeline and executing the first store request a second time. | 12-19-2013 |
20140082299 | PRIORITIZING REQUESTS TO MEMORY - According to an embodiment, a computer system for cache management includes a processor and a cache, the computer system configured to perform a method including receiving a first store request for a first address in the cache and receiving a first fetch request for the first address in the cache. The method also includes executing the first store request and the first fetch request, latching the first store request in a store write-back pipeline in the cache, detecting, in the processor, a conflict following execution of the first store request and the first fetch request and receiving the first store request from a recycle path including the store write-back pipeline and executing the first store request a second time. | 03-20-2014 |
20140325189 | QUERY SAMPLING INFORMATION INSTRUCTION - A measurement sampling facility takes snapshots of the central processing unit (CPU) on which it is executing at specified sampling intervals to collect data relating to tasks executing on the CPU. The collected data is stored in a buffer, and at selected times, an interrupt is provided to remove data from the buffer to enable reuse thereof. The interrupt is not taken after each sample, but in sufficient time to remove the data and minimize data loss. | 10-30-2014 |