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1. 发明专利

DE4227346C2 未知
公开(公告)号：DE4227346C2
公开(公告)日：1999-09-09
申请号：DE4227346
申请日：1992-08-18
申请人： SEQUENT COMPUTER SYSTEMS INC
发明人： COULSON RICHARD L , O'MALLEY VINCENT G , SAFRANEK ROBERT J
IPC分类号： G06F1/30 , G06F1/32 , G06F13/28 , G06F13/42 , G06F13/14 , G06F13/00
摘要： An apparatus and a method facilitate the sharing of a SCSI address ID between a SCSI initiator and a target device. The SCSI standard does not prohibit ID sharing under a set of operating conditions defined by this invention. The shared ID is preferably used for controlling an environmental monitor device that controls the power of disk drives on the SCSI bus, detects their status and configuration, and monitors environmental conditions within a mass storage system cabinet. Power to individual disk drives is switched under control of the computer operating system so that start-up surge current to the disk drives is limited. This allows defective drives to be powered down and replaced without powering down the remaining good drives. SCSI termination power distribution is improved so that connector reversals can be detected and resulting current surges limited. Termination power control and status is under program control. The reliability, utility, and cost-effectiveness of large SCSI bus-based mass storage systems is improved through the use of this invention.

2. 发明专利

GB9217740D0 CACHE AFFINITY SCHEDULER 未知
公开(公告)号：GB9217740D0
公开(公告)日：1992-09-30
申请号：GB9217740
申请日：1992-08-19
申请人： SEQUENT COMPUTER SYSTEMS INC
IPC分类号： G06F9/50 , G06F12/08
摘要： A computing system (50) includes N number of symmetrical computing engines having N number of cache memories joined by a system bus (12). The computing system includes a global run queue (54), an FPA global run queue, and N number of affinity run queues (58). Each engine is associated with one affinity run queue, which includes multiple slots. When a process first becomes runnable, it is typically attached one of the global run queues. A scheduler allocates engines to processes and schedules the processes to run on the basis of priority and engine availability. An engine typically stops running a process before it is complete. When the process becomes runnable again the scheduler estimates the remaining cache context for the process in the cache of the engine. The scheduler uses the estimated amount of cache context in deciding in which run queue a process is to be enqueued. The process is enqueued to the affinity run queue of the engine when the estimated cache context of the process is sufficiently high, and is enqueued onto the global run queue when the cache context is sufficiently low. The procedure increases computing system performance and reduces bus traffic because processes will run on engines having sufficient cache affinity, but will also run on the best available engine when there is insufficient cache context.

3. 发明专利

GB2284081A Cache affinity scheduler 未知
公开(公告)号：GB2284081A
公开(公告)日：1995-05-24
申请号：GB9425745
申请日：1992-08-19
申请人： SEQUENT COMPUTER SYSTEMS INC
发明人： VALENCIA ANDREW J
IPC分类号： G06F9/50 , G06F12/08 , G06F12/0842 , G06F9/46
摘要： A computing system 50 includes N symmetrical computing engines having N cache memories joined by a system bus 12. The computing system includes a global run queue (54), an FPA global run queue, and N affinity run queues (58). Each engine is associated with one affinity run queue, which includes multiple slots. When a process first becomes runnable, it is typically attached to one of the global run queues. A scheduler allocates engines to processes and schedules the processes to run on the basis of priority and engine availability. The system keeps track of the number of processes queued to each processor and can transfer a process from one processor to another with a shorter queue.

4. 发明专利

DE4227346A1 未知
公开(公告)号：DE4227346A1
公开(公告)日：1993-02-25
申请号：DE4227346
申请日：1992-08-18
申请人： SEQUENT COMPUTER SYSTEMS INC
发明人： COULSON RICHARD L , O'MALLEY VINCENT G , SAFRANEK ROBERT J
IPC分类号： G06F1/30 , G06F1/32 , G06F13/28 , G06F13/42
摘要： An apparatus and a method facilitate the sharing of a SCSI address ID between a SCSI initiator and a target device. The SCSI standard does not prohibit ID sharing under certain operating conditions. The shared ID is preferably used by a monitor device 70 that controls the power of disk drives 30A, 30B, 30C on the SCSI bus, detects their status and configuration, and monitors environmental conditions within a mass storage system cabinet. Power to individual disk drives is switched under control of the computer operating system so that start-up surge current to the disk drives is limited. This allows defective drives to be powered down and replaced without powering down the remaining good drives. SCSI termination power distribution is improved so that connector reversals can be detected and resulting current surges limited. Termination power control and status is under program control, 28, 100. The reliability, utility, and cost-effectiveness of large SCSI bus-based mass storage systems is improved through the use of this invention.

5. 发明专利

GB2258932A ACHIEVING IMPROVED SCSI BUS CONTROL CAPACITY 未知
公开(公告)号：GB2258932A
公开(公告)日：1993-02-24
申请号：GB9217739
申请日：1992-08-19
申请人： SEQUENT COMPUTER SYSTEMS INC
发明人： COULSON RICHARD L , O'MALLEY VINCENT G , SAFRANEK ROBERT J
IPC分类号： G06F1/30 , G06F1/32 , G06F13/28 , G06F13/42
摘要： An apparatus and a method facilitate the sharing of a SCSI address ID between a SCSI initiator and a target device. The SCSI standard does not prohibit ID sharing under a set of operating conditions defined by this invention. The shared ID is preferably used for controlling an environmental monitor device that controls the power of disk drives on the SCSI bus, detects their status and configuration, and monitors environmental conditions within a mass storage system cabinet. Power to individual disk drives is switched under control of the computer operating system so that start-up surge current to the disk drives is limited. This allows defective drives to be powered down and replaced without powering down the remaining good drives. SCSI termination power distribution is improved so that connector reversals can be detected and resulting current surges limited. Termination power control and status is under program control. The reliability, utility, and cost-effectiveness of large SCSI bus-based mass storage systems is improved through the use of this invention.

6. 发明专利

GB2284081B Computing system 未知
公开(公告)号：GB2284081B
公开(公告)日：1995-10-04
申请号：GB9425745
申请日：1992-08-19
申请人： SEQUENT COMPUTER SYSTEMS INC
发明人： VALENCIA ANDREW J
IPC分类号： G06F9/50 , G06F12/08 , G06F12/0842 , G06F9/46

7. 发明专利

DE4227345C2 未知
公开(公告)号：DE4227345C2
公开(公告)日：1999-01-14
申请号：DE4227345
申请日：1992-08-18
申请人： SEQUENT COMPUTER SYSTEMS INC
发明人： VALENCIA ANDREW J
IPC分类号： G06F9/50 , G06F12/08 , G06F15/76 , G06F9/38 , G06F9/46
摘要： A computing system (50) includes N number of symmetrical computing engines having N number of cache memories joined by a system bus (12). The computing system includes a global run queue (54), an FPA global run queue, and N number of affinity run queues (58). Each engine is associated with one affinity run queue, which includes multiple slots. When a process first becomes runnable, it is typically attached one of the global run queues. A scheduler allocates engines to processes and schedules the processes to run on the basis of priority and engine availability. An engine typically stops running a process before it is complete. When the process becomes runnable again the scheduler estimates the remaining cache context for the process in the cache of the engine. The scheduler uses the estimated amount of cache context in deciding in which run queue a process is to be enqueued. The process is enqueued to the affinity run queue of the engine when the estimated cache context of the process is sufficiently high, and is enqueued onto the global run queue when the cache context is sufficiently low. The procedure increases computing system performance and reduces bus traffic because processes will run on engines having sufficient cache affinity, but will also run on the best available engine when there is insufficient cache context.

8. 发明专利

GB2258933B Cache affinity scheduler 未知
公开(公告)号：GB2258933B
公开(公告)日：1995-10-04
申请号：GB9217740
申请日：1992-08-19
申请人： SEQUENT COMPUTER SYSTEMS INC
发明人： VALENCIA ANDREW J
IPC分类号： G06F9/50 , G06F12/08 , G06F9/46
摘要： A computing system (50) includes N number of symmetrical computing engines having N number of cache memories joined by a system bus (12). The computing system includes a global run queue (54), an FPA global run queue, and N number of affinity run queues (58). Each engine is associated with one affinity run queue, which includes multiple slots. When a process first becomes runnable, it is typically attached one of the global run queues. A scheduler allocates engines to processes and schedules the processes to run on the basis of priority and engine availability. An engine typically stops running a process before it is complete. When the process becomes runnable again the scheduler estimates the remaining cache context for the process in the cache of the engine. The scheduler uses the estimated amount of cache context in deciding in which run queue a process is to be enqueued. The process is enqueued to the affinity run queue of the engine when the estimated cache context of the process is sufficiently high, and is enqueued onto the global run queue when the cache context is sufficiently low. The procedure increases computing system performance and reduces bus traffic because processes will run on engines having sufficient cache affinity, but will also run on the best available engine when there is insufficient cache context.

9. 发明专利

DE4227345A1 未知
公开(公告)号：DE4227345A1
公开(公告)日：1993-02-25
申请号：DE4227345
申请日：1992-08-18
申请人： SEQUENT COMPUTER SYSTEMS INC
发明人： VALENCIA ANDREW J
IPC分类号： G06F9/50 , G06F12/08
摘要： A computing system (50) includes N number of symmetrical computing engines having N number of cache memories joined by a system bus (12). The computing system includes a global run queue (54), an FPA global run queue, and N number of affinity run queues (58). Each engine is associated with one affinity run queue, which includes multiple slots. When a process first becomes runnable, it is typically attached one of the global run queues. A scheduler allocates engines to processes and schedules the processes to run on the basis of priority and engine availability. An engine typically stops running a process before it is complete. When the process becomes runnable again the scheduler estimates the remaining cache context for the process in the cache of the engine. The scheduler uses the estimated amount of cache context in deciding in which run queue a process is to be enqueued. The process is enqueued to the affinity run queue of the engine when the estimated cache context of the process is sufficiently high, and is enqueued onto the global run queue when the cache context is sufficiently low. The procedure increases computing system performance and reduces bus traffic because processes will run on engines having sufficient cache affinity, but will also run on the best available engine when there is insufficient cache context.

10. 发明专利

GB9217739D0 APPARATUS AND METHOD FOR ACHIEVING IMPROVED SCSI BUS CONTROL CAPACITY 未知
公开(公告)号：GB9217739D0
公开(公告)日：1992-09-30
申请号：GB9217739
申请日：1992-08-19
申请人： SEQUENT COMPUTER SYSTEMS INC
IPC分类号： G06F1/30 , G06F1/32 , G06F13/28 , G06F13/42
摘要： An apparatus and a method facilitate the sharing of a SCSI address ID between a SCSI initiator and a target device. The SCSI standard does not prohibit ID sharing under a set of operating conditions defined by this invention. The shared ID is preferably used for controlling an environmental monitor device that controls the power of disk drives on the SCSI bus, detects their status and configuration, and monitors environmental conditions within a mass storage system cabinet. Power to individual disk drives is switched under control of the computer operating system so that start-up surge current to the disk drives is limited. This allows defective drives to be powered down and replaced without powering down the remaining good drives. SCSI termination power distribution is improved so that connector reversals can be detected and resulting current surges limited. Termination power control and status is under program control. The reliability, utility, and cost-effectiveness of large SCSI bus-based mass storage systems is improved through the use of this invention.

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