公开(公告)号：US20190391922A1

公开(公告)日：2019-12-26

申请号：US16561352

申请日：2019-09-05

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Bruce C. GIAMEI ,  Christian JACOBI ,  Daniel V. ROSA ,  Anthony SAPORITO ,  Donald W. SCHMIDT ,  Chung-Lung K. SHUM

IPC: G06F12/0875 ,  G06F12/084 ,  G06F12/0815 ,  G06F12/0862 ,  G06F12/0811 ,  G06F12/0842 ,  G06F12/1027

Abstract: Processing of a storage operand request identified as restrained is selectively, temporarily suppressed. The processing includes determining whether a storage operand request to a common storage location shared by multiple processing units of a computing environment is restrained, and based on determining that the storage operand request is restrained, then temporarily suppressing requesting access to the common storage location pursuant to the storage operand request. The processing unit performing the processing may proceed with processing of the restrained storage operand request, without performing the suppressing, where the processing can be accomplished using cache private to the processing unit. Otherwise the suppressing may continue until an instruction, or operation of an instruction, associated with the storage operand request is next to complete.

公开(公告)号：US20180196727A1

公开(公告)日：2018-07-12

申请号：US15402412

申请日：2017-01-10

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Bruce C. GIAMEI ,  Christian JACOBI ,  Daniel V. ROSA ,  Anthony SAPORITO ,  Donald W. SCHMIDT

IPC: G06F11/34 ,  G06F9/48 ,  G06F11/30

CPC classification number: G06F11/3433 ,  G06F9/4881 ,  G06F9/5033 ,  G06F11/3024 ,  G06F11/3419 ,  G06F2201/88 ,  G06F2201/885 ,  G06F2209/508

Abstract: A facility is provided for collecting time-slice-instrumentation information during processing unit execution. The facility counts, at least in part, occurrence of a specified processing unit event during a time-slice of processing unit execution. The counted events occurring during a first interval of execution and a second interval of execution of the time-slice are retained. The first interval of execution is earlier in the time-slice than the second interval of execution, and the counted events facilitate adjusting performance of the processing unit. In an embodiment, the time-slice is a contiguous period of time of processing unit execution, and the specified processing unit event includes a cache event. The processing unit may interleave processing of multiple different units of work across multiple contiguous time-slices, and during a single time-slice, a single unit of work of the multiple different units of work is processed by the processing unit.

公开(公告)号：US20180196751A1

公开(公告)日：2018-07-12

申请号：US15404247

申请日：2017-01-12

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Bruce C. GIAMEI ,  Christian JACOBI ,  Daniel V. ROSA ,  Anthony SAPORITO ,  Donald W. SCHMIDT ,  Chung-Lung K. SHUM

IPC: G06F12/0808 ,  G06F12/0811 ,  G06F12/084 ,  G06F12/0842 ,  G06F12/0891

CPC classification number: G06F12/0808 ,  G06F12/0811 ,  G06F12/0815 ,  G06F12/084 ,  G06F12/0842 ,  G06F12/0891 ,  G06F2212/1016 ,  G06F2212/1024 ,  G06F2212/6042

Abstract: A computing environment facility is provided to extend a hold of a cache line in private (or local) cache exclusively after processing a storage operand request. The facility includes determining whether a storage operand request to a storage location shared by multiple processing units of the computing environment is designated hold. In addition, a determination is made whether a state of the corresponding cache line in private cache used for processing the storage operand request is owned exclusively. Based on determining that the storage operand request is designated hold, and that the state of the corresponding cache line in private cache used for processing the storage operand request is owned exclusively, continuing to hold the corresponding cache line in the private cache exclusively after completing processing of the storage operand request. The continuing to hold may include initiating a counter to facilitate the continuing hold for a desired, set interval.

公开(公告)号：US20210096998A1

公开(公告)日：2021-04-01

申请号：US17117299

申请日：2020-12-10

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Bruce C. GIAMEI ,  Christian JACOBI ,  Daniel V. ROSA ,  Anthony SAPORITO ,  Donald W. SCHMIDT ,  Chung-Lung K. SHUM

IPC: G06F12/0875 ,  G06F12/1027 ,  G06F12/0842 ,  G06F12/0811 ,  G06F12/0862 ,  G06F12/0815 ,  G06F12/084 ,  G06F9/30 ,  G06F9/38

Abstract: Processing of a storage operand request identified as restrained is selectively, temporarily suppressed. The processing includes identifying a storage operand request as restrained, where the identifying includes obtaining, by a processing unit, an access intent instruction indicating an access intent associated with an operand of a next sequential instruction. The access intent indicates usage of the storage operand request is restrained. Further, the method includes determining whether a storage operand request is to a common storage location shared by multiple processing units of a computing environment and is identified restrained, and based on determining that the storage operand request is restrained, then temporarily suppressing requesting access to the common storage location pursuant to the storage operand request.

公开(公告)号：US20180196754A1

公开(公告)日：2018-07-12

申请号：US15404254

申请日：2017-01-12

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Bruce C. GIAMEI ,  Christian JACOBI ,  Daniel V. ROSA ,  Anthony SAPORITO ,  Donald W. SCHMIDT ,  Chung-Lung K. SHUM

IPC: G06F12/0875 ,  G06F12/1027 ,  G06F12/0842 ,  G06F12/0811 ,  G06F12/0862 ,  G06F12/0815 ,  G06F12/084

Abstract: Processing of a storage operand request identified as restrained is selectively, temporarily suppressed. The processing includes determining whether a storage operand request to a common storage location shared by multiple processing units of a computing environment is restrained, and based on determining that the storage operand request is restrained, then temporarily suppressing requesting access to the common storage location pursuant to the storage operand request. The processing unit performing the processing may proceed with processing of the restrained storage operand request, without performing the suppressing, where the processing can be accomplished using cache private to the processing unit. Otherwise the suppressing may continue until an instruction, or operation of an instruction, associated with the storage operand request is next to complete.