diff options
| author | Kajol Jain <kjain@linux.ibm.com> | 2022-02-25 15:30:23 +0100 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2022-03-10 02:50:50 +0100 |
| commit | 4c08d4bbc089a95f3f38389c2b79dbc6ab24f10b (patch) | |
| tree | da41f45b774f0b8346bbab7fb79dec1ad37cd49a /arch/powerpc/include | |
| parent | drivers/nvdimm: Add perf interface to expose nvdimm performance stats (diff) | |
| download | linux-4c08d4bbc089a95f3f38389c2b79dbc6ab24f10b.tar.xz linux-4c08d4bbc089a95f3f38389c2b79dbc6ab24f10b.zip | |
powerpc/papr_scm: Add perf interface support
Performance monitoring support for papr-scm nvdimm devices
via perf interface is added which includes addition of pmu
functions like add/del/read/event_init for nvdimm_pmu struture.
A new parameter 'priv' in added to the pdev_archdata structure to save
nvdimm_pmu device pointer, to handle the unregistering of pmu device.
papr_scm_pmu_register function populates the nvdimm_pmu structure
with name, capabilities, cpumask along with event handling
functions. Finally the populated nvdimm_pmu structure is passed to
register the pmu device. Event handling functions internally uses
hcall to get events and counter data.
Result in power9 machine with 2 nvdimm device:
Ex: List all event by perf list
command:# perf list nmem
nmem0/cache_rh_cnt/ [Kernel PMU event]
nmem0/cache_wh_cnt/ [Kernel PMU event]
nmem0/cri_res_util/ [Kernel PMU event]
nmem0/ctl_res_cnt/ [Kernel PMU event]
nmem0/ctl_res_tm/ [Kernel PMU event]
nmem0/fast_w_cnt/ [Kernel PMU event]
nmem0/host_l_cnt/ [Kernel PMU event]
nmem0/host_l_dur/ [Kernel PMU event]
nmem0/host_s_cnt/ [Kernel PMU event]
nmem0/host_s_dur/ [Kernel PMU event]
nmem0/med_r_cnt/ [Kernel PMU event]
nmem0/med_r_dur/ [Kernel PMU event]
nmem0/med_w_cnt/ [Kernel PMU event]
nmem0/med_w_dur/ [Kernel PMU event]
nmem0/mem_life/ [Kernel PMU event]
nmem0/poweron_secs/ [Kernel PMU event]
...
nmem1/mem_life/ [Kernel PMU event]
nmem1/poweron_secs/ [Kernel PMU event]
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Nageswara R Sastry <rnsastry@linux.ibm.com>
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
[Add numa_map_to_online_node function call to get online node id]
Reported-by: Nageswara R Sastry <rnsastry@linux.ibm.com>
Reviewed-by: Madhavan Srinivasan <maddy@in.ibm.com>
Link: https://lore.kernel.org/r/20220225143024.47947-4-kjain@linux.ibm.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/device.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/device.h b/arch/powerpc/include/asm/device.h index 219559d65864..47ed639f3b8f 100644 --- a/arch/powerpc/include/asm/device.h +++ b/arch/powerpc/include/asm/device.h @@ -48,6 +48,11 @@ struct dev_archdata { struct pdev_archdata { u64 dma_mask; + /* + * Pointer to nvdimm_pmu structure, to handle the unregistering + * of pmu device + */ + void *priv; }; #endif /* _ASM_POWERPC_DEVICE_H */ |