Length Changing Prefixes

Metric Description

This metric represents a fraction of cycles during which CPU was stalled due to Length Changing Prefixes (LCPs). To avoid this issue, use proper compiler flags. Intel Compiler enables these flags by default.

Possible Issues

This metric represents a fraction of cycles during which CPU was stalled due to Length Changing Prefixes (LCPs).

Tips

To avoid this issue, use proper compiler flags. Intel Compiler enables these flags by default.

See the "Length-Changing Prefixes (LCP)" section in the Intel 64 and IA-32 Architectures Optimization Reference Manual.

For more complete information about compiler optimizations, see our Optimization Notice.
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