User Guide

  • 2020
  • 06/18/2020
  • Public Content
Contents

Front-End Bandwidth LSD

Metric Description

This metric represents a fraction of cycles during which CPU operation was limited by the LSD (Loop Stream Detector) unit. Typically, LSD provides good uOp supply. However, in some rare cases, optimal uOp delivery cannot be reached for small loops whose size (in terms of number of uOps) does not suit well the LSD structure.

Possible Issues

A significant number of CPU cycles is spent waiting for uOps for the LSD (Loop Stream Detector) unit. Typically, LSD provides good uOp support. However, in some rare cases, optimal uOp delivery cannot be reached for small loops whose size (in terms of number of uOps) does not suit well the LSD structure.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804