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| author | Ji Sheng Teoh <jisheng.teoh@starfivetech.com> | 2024-02-29 15:27:17 +0800 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2024-03-04 14:19:48 +0000 |
| commit | c2b24812f7bc5fbd6f2f92af070856fbe4c37b40 (patch) | |
| tree | f7adef6b0694477b43091ae2e59d1ada8f688eab /drivers/perf/Kconfig | |
| parent | 89a032923d4ba23907405744aa86265822f057f8 (diff) | |
| download | linux-c2b24812f7bc5fbd6f2f92af070856fbe4c37b40.tar.gz linux-c2b24812f7bc5fbd6f2f92af070856fbe4c37b40.zip | |
perf: starfive: Add StarLink PMU support
This patch adds support for StarFive's StarLink PMU (Performance
Monitor Unit). StarLink PMU integrates one or more CPU cores with
a shared L3 memory system. The PMU supports overflow interrupt,
up to 16 programmable 64bit event counters, and an independent
64bit cycle counter. StarLink PMU is accessed via MMIO.
Example Perf stat output:
[root@user]# perf stat -a -e /starfive_starlink_pmu/cycles/ \
-e /starfive_starlink_pmu/read_miss/ \
-e /starfive_starlink_pmu/read_hit/ \
-e /starfive_starlink_pmu/release_request/ \
-e /starfive_starlink_pmu/write_hit/ \
-e /starfive_starlink_pmu/write_miss/ \
-e /starfive_starlink_pmu/write_request/ \
-e /starfive_starlink_pmu/writeback/ \
-e /starfive_starlink_pmu/read_request/ \
-- openssl speed rsa2048
Doing 2048 bits private rsa's for 10s: 5 2048 bits private RSA's in
2.84s
Doing 2048 bits public rsa's for 10s: 169 2048 bits public RSA's in
2.42s
version: 3.0.11
built on: Tue Sep 19 13:02:31 2023 UTC
options: bn(64,64)
CPUINFO: N/A
sign verify sign/s verify/s
rsa 2048 bits 0.568000s 0.014320s 1.8 69.8
/////////
Performance counter stats for 'system wide':
649991998 starfive_starlink_pmu/cycles/
1009690 starfive_starlink_pmu/read_miss/
1079750 starfive_starlink_pmu/read_hit/
2089405 starfive_starlink_pmu/release_request/
129 starfive_starlink_pmu/write_hit/
70 starfive_starlink_pmu/write_miss/
194 starfive_starlink_pmu/write_request/
150080 starfive_starlink_pmu/writeback/
2089423 starfive_starlink_pmu/read_request/
27.062755678 seconds time elapsed
Signed-off-by: Ji Sheng Teoh <jisheng.teoh@starfivetech.com>
Link: https://lore.kernel.org/r/20240229072720.3987876-2-jisheng.teoh@starfivetech.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/perf/Kconfig')
| -rw-r--r-- | drivers/perf/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig index ec6e0d9194a1..2774b18f4e27 100644 --- a/drivers/perf/Kconfig +++ b/drivers/perf/Kconfig @@ -86,6 +86,15 @@ config RISCV_PMU_SBI full perf feature support i.e. counter overflow, privilege mode filtering, counter configuration. +config STARFIVE_STARLINK_PMU + depends on ARCH_STARFIVE || COMPILE_TEST + bool "StarFive StarLink PMU" + help + Provide support for StarLink Performance Monitor Unit. + StarLink Performance Monitor Unit integrates one or more cores with + an L3 memory system. The L3 cache events are added into perf event + subsystem, allowing monitoring of various L3 cache perf events. + config ARM_PMU_ACPI depends on ARM_PMU && ACPI def_bool y |