公开(公告)号：US20150089198A1

公开(公告)日：2015-03-26

申请号：US14033378

申请日：2013-09-20

Applicant: NVIDIA CORPORATION

Inventor： Peter SOMMERS ,  Peter NELSON ,  Aniket NAIK ,  John H. EDMONDSON

IPC: G06F9/38 ,  G06F9/30

CPC classification number: G06F9/3836

Abstract: An issue control unit is configured to control the rate at which an instruction issue unit issues instructions to an execution pipeline in order to avoid spikes in power drawn by that execution pipeline. The issue control unit maintains a history buffer that reflects, for N previous cycles, the number of instructions issued during each of those N cycles. If the total number of instructions issued during the N previous cycles exceeds a threshold value, then the issue control unit throttles the instruction issue unit from issuing instructions during a subsequent cycle. In addition, the issue control unit increases the threshold value in proportion to the number of previously issued instructions and based on a variety of configurable parameters. Accordingly, the issue control unit maintains granular control over the rate with which the instruction issue unit “ramps up” to a maximum instruction issue rate.

Abstract translation: 问题控制单元被配置为控制指令发布单元向执行流水线发出指令的速率，以避免该执行流水线所绘制的功率尖峰。 问题控制单元保持历史缓冲器，其反映在N个先前循环中在这N个周期中的每一个期间发出的指令的数量。 如果在N个先前循环中发出的指令的总数超过阈值，则发布控制单元在随后的周期期间阻止指令发出单元发出指令。 此外，问题控制单元根据先前发布的指令的数量并且基于各种可配置参数来增加阈值。 因此，问题控制单元对指令发布单元“上升”到最大指令发布速率的速率进行细粒度控制。