RISC-V ISA Explorer · System

Zihpm: Perf Counters

Ratified 2023-03 · version 2.0.0

Up to 29 programmable event counters, hpmcounter3 through hpmcounter31, for profiling and performance tuning.

Typical use: Hardware performance monitors

Specification

Open Zihpm in the explorer

Dependencies

Requires

Zicsr

Instructions

No instruction encodings are listed for this extension in the catalogue.

Control and status registers (58)

Name	Address	Mode	Description
`hpmcounter10`	`0xc0a`	U	Unprivileged Hardware Performance Counter 10
`hpmcounter10h`	`0xc8a`	U	Unprivileged Hardware Performance Counter 10, high half
`hpmcounter11`	`0xc0b`	U	Unprivileged Hardware Performance Counter 11
`hpmcounter11h`	`0xc8b`	U	Unprivileged Hardware Performance Counter 11, high half
`hpmcounter12`	`0xc0c`	U	Unprivileged Hardware Performance Counter 12
`hpmcounter12h`	`0xc8c`	U	Unprivileged Hardware Performance Counter 12, high half
`hpmcounter13`	`0xc0d`	U	Unprivileged Hardware Performance Counter 13
`hpmcounter13h`	`0xc8d`	U	Unprivileged Hardware Performance Counter 13, high half
`hpmcounter14`	`0xc0e`	U	Unprivileged Hardware Performance Counter 14
`hpmcounter14h`	`0xc8e`	U	Unprivileged Hardware Performance Counter 14, high half
`hpmcounter15`	`0xc0f`	U	Unprivileged Hardware Performance Counter 15
`hpmcounter15h`	`0xc8f`	U	Unprivileged Hardware Performance Counter 15, high half
`hpmcounter16`	`0xc10`	U	Unprivileged Hardware Performance Counter 16
`hpmcounter16h`	`0xc90`	U	Unprivileged Hardware Performance Counter 16, high half
`hpmcounter17`	`0xc11`	U	Unprivileged Hardware Performance Counter 17
`hpmcounter17h`	`0xc91`	U	Unprivileged Hardware Performance Counter 17, high half
`hpmcounter18`	`0xc12`	U	Unprivileged Hardware Performance Counter 18
`hpmcounter18h`	`0xc92`	U	Unprivileged Hardware Performance Counter 18, high half
`hpmcounter19`	`0xc13`	U	Unprivileged Hardware Performance Counter 19
`hpmcounter19h`	`0xc93`	U	Unprivileged Hardware Performance Counter 19, high half
`hpmcounter20`	`0xc14`	U	Unprivileged Hardware Performance Counter 20
`hpmcounter20h`	`0xc94`	U	Unprivileged Hardware Performance Counter 20, high half
`hpmcounter21`	`0xc15`	U	Unprivileged Hardware Performance Counter 21
`hpmcounter21h`	`0xc95`	U	Unprivileged Hardware Performance Counter 21, high half
`hpmcounter22`	`0xc16`	U	Unprivileged Hardware Performance Counter 22
`hpmcounter22h`	`0xc96`	U	Unprivileged Hardware Performance Counter 22, high half
`hpmcounter23`	`0xc17`	U	Unprivileged Hardware Performance Counter 23
`hpmcounter23h`	`0xc97`	U	Unprivileged Hardware Performance Counter 23, high half
`hpmcounter24`	`0xc18`	U	Unprivileged Hardware Performance Counter 24
`hpmcounter24h`	`0xc98`	U	Unprivileged Hardware Performance Counter 24, high half
`hpmcounter25`	`0xc19`	U	Unprivileged Hardware Performance Counter 25
`hpmcounter25h`	`0xc99`	U	Unprivileged Hardware Performance Counter 25, high half
`hpmcounter26`	`0xc1a`	U	Unprivileged Hardware Performance Counter 26
`hpmcounter26h`	`0xc9a`	U	Unprivileged Hardware Performance Counter 26, high half
`hpmcounter27`	`0xc1b`	U	Unprivileged Hardware Performance Counter 27
`hpmcounter27h`	`0xc9b`	U	Unprivileged Hardware Performance Counter 27, high half
`hpmcounter28`	`0xc1c`	U	Unprivileged Hardware Performance Counter 28
`hpmcounter28h`	`0xc9c`	U	Unprivileged Hardware Performance Counter 28, high half
`hpmcounter29`	`0xc1d`	U	Unprivileged Hardware Performance Counter 29
`hpmcounter29h`	`0xc9d`	U	Unprivileged Hardware Performance Counter 29, high half
`hpmcounter3`	`0xc03`	U	Unprivileged Hardware Performance Counter 3
`hpmcounter30`	`0xc1e`	U	Unprivileged Hardware Performance Counter 30
`hpmcounter30h`	`0xc9e`	U	Unprivileged Hardware Performance Counter 30, high half
`hpmcounter31`	`0xc1f`	U	Unprivileged Hardware Performance Counter 31
`hpmcounter31h`	`0xc9f`	U	Unprivileged Hardware Performance Counter 31, high half
`hpmcounter3h`	`0xc83`	U	Unprivileged Hardware Performance Counter 3, high half
`hpmcounter4`	`0xc04`	U	Unprivileged Hardware Performance Counter 4
`hpmcounter4h`	`0xc84`	U	Unprivileged Hardware Performance Counter 4, high half
`hpmcounter5`	`0xc05`	U	Unprivileged Hardware Performance Counter 5
`hpmcounter5h`	`0xc85`	U	Unprivileged Hardware Performance Counter 5, high half
`hpmcounter6`	`0xc06`	U	Unprivileged Hardware Performance Counter 6
`hpmcounter6h`	`0xc86`	U	Unprivileged Hardware Performance Counter 6, high half
`hpmcounter7`	`0xc07`	U	Unprivileged Hardware Performance Counter 7
`hpmcounter7h`	`0xc87`	U	Unprivileged Hardware Performance Counter 7, high half
`hpmcounter8`	`0xc08`	U	Unprivileged Hardware Performance Counter 8
`hpmcounter8h`	`0xc88`	U	Unprivileged Hardware Performance Counter 8, high half
`hpmcounter9`	`0xc09`	U	Unprivileged Hardware Performance Counter 9
`hpmcounter9h`	`0xc89`	U	Unprivileged Hardware Performance Counter 9, high half