Re: [PATCH v7 0/4] Add perf interface to expose nvdimm
On Mon, Mar 7, 2022 at 9:27 PM kajoljain wrote: > > Hi Dan, > Can you take this patch-set if it looks fine to you. > Pushed out to my libnvdimm-pending branch for a 0day confirmation before heading over to linux-next.
Re: [PATCH v7 0/4] Add perf interface to expose nvdimm
Hi Dan, Can you take this patch-set if it looks fine to you. Thanks, Kajol Jain On 2/25/22 20:00, Kajol Jain wrote: > Patchset adds performance stats reporting support for nvdimm. > Added interface includes support for pmu register/unregister > functions. A structure is added called nvdimm_pmu to be used for > adding arch/platform specific data such as cpumask, nvdimm device > pointer and pmu event functions like event_init/add/read/del. > User could use the standard perf tool to access perf events > exposed via pmu. > > Interface also defines supported event list, config fields for the > event attributes and their corresponding bit values which are exported > via sysfs. Patch 3 exposes IBM pseries platform nmem* device > performance stats using this interface. > > Result from power9 pseries lpar 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] > > Patch1: > Introduces the nvdimm_pmu structure > Patch2: > Adds common interface to add arch/platform specific data > includes nvdimm device pointer, pmu data along with > pmu event functions. It also defines supported event list > and adds attribute groups for format, events and cpumask. > It also adds code for cpu hotplug support. > Patch3: > Add code in arch/powerpc/platform/pseries/papr_scm.c to expose > nmem* pmu. It fills in the nvdimm_pmu structure with pmu name, > capabilities, cpumask and event functions and then registers > the pmu by adding callbacks to register_nvdimm_pmu. > Patch4: > Sysfs documentation patch > > Changelog > --- > v6 -> v7 > - Add function call to numa_map_to_online_node function inorder to > get online numa node. As the node id returned by function dev_to_node > can be offline in some scenarios and can create issue in hotplug code > as reported by Nageswara R Sastry. > > - Add function declaration of perf_pmu_register, perf_pmu_unregister > and perf_pmu_migrate_context functions in nd.h file to resolve > the implicit-function-declaration warning as reported by kernel test > robot. > Link: https://lore.kernel.org/all/202202241242.zqzgkguy-...@intel.com/ > > - Add Tested-by, Acked-by and Reported-by tags from Peter Zijlstra > and Nageswara R Sastry. > > - Link to the patchset v6: https://lkml.org/lkml/2022/2/17/857 > > Resend v5 -> v6 > - No logic change, just a rebase to latest upstream and > tested the patchset. > > - Link to the patchset Resend v5: https://lkml.org/lkml/2021/11/15/3979 > > v5 -> Resend v5 > - Resend the patchset > > - Link to the patchset v5: https://lkml.org/lkml/2021/9/28/643 > > v4 -> v5: > - Remove multiple variables defined in nvdimm_pmu structure include > name and pmu functions(event_int/add/del/read) as they are just > used to copy them again in pmu variable. Now we are directly doing > this step in arch specific code as suggested by Dan Williams. > > - Remove attribute group field from nvdimm pmu structure and > defined these attribute groups in common interface which > includes format, event list along with cpumask as suggested by > Dan Williams. > Since we added static defination for attrbute groups needed in > common interface, removes corresponding code from papr. > > - Add nvdimm pmu event list with event codes in the common interface. > > - Remove Acked-by/Reviewed-by/Tested-by tags as code is refactored > to handle review comments from Dan. > > - Make nvdimm_pmu_free_hotplug_memory function static as reported > by kernel test robot, also add corresponding Reported-by tag. > > - Link to the
Re: [PATCH v7 0/4] Add perf interface to expose nvdimm
On 2/25/22 20:00, Kajol Jain wrote: Patchset adds performance stats reporting support for nvdimm. Added interface includes support for pmu register/unregister functions. A structure is added called nvdimm_pmu to be used for adding arch/platform specific data such as cpumask, nvdimm device pointer and pmu event functions like event_init/add/read/del. User could use the standard perf tool to access perf events exposed via pmu. Interface also defines supported event list, config fields for the event attributes and their corresponding bit values which are exported via sysfs. Patch 3 exposes IBM pseries platform nmem* device performance stats using this interface. Result from power9 pseries lpar with 2 nvdimm device: Patchset looks fine to me. Reviewed-by: Madhavan Srinivasan 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] Patch1: Introduces the nvdimm_pmu structure Patch2: Adds common interface to add arch/platform specific data includes nvdimm device pointer, pmu data along with pmu event functions. It also defines supported event list and adds attribute groups for format, events and cpumask. It also adds code for cpu hotplug support. Patch3: Add code in arch/powerpc/platform/pseries/papr_scm.c to expose nmem* pmu. It fills in the nvdimm_pmu structure with pmu name, capabilities, cpumask and event functions and then registers the pmu by adding callbacks to register_nvdimm_pmu. Patch4: Sysfs documentation patch Changelog --- v6 -> v7 - Add function call to numa_map_to_online_node function inorder to get online numa node. As the node id returned by function dev_to_node can be offline in some scenarios and can create issue in hotplug code as reported by Nageswara R Sastry. - Add function declaration of perf_pmu_register, perf_pmu_unregister and perf_pmu_migrate_context functions in nd.h file to resolve the implicit-function-declaration warning as reported by kernel test robot. Link: https://lore.kernel.org/all/202202241242.zqzgkguy-...@intel.com/ - Add Tested-by, Acked-by and Reported-by tags from Peter Zijlstra and Nageswara R Sastry. - Link to the patchset v6: https://lkml.org/lkml/2022/2/17/857 Resend v5 -> v6 - No logic change, just a rebase to latest upstream and tested the patchset. - Link to the patchset Resend v5: https://lkml.org/lkml/2021/11/15/3979 v5 -> Resend v5 - Resend the patchset - Link to the patchset v5: https://lkml.org/lkml/2021/9/28/643 v4 -> v5: - Remove multiple variables defined in nvdimm_pmu structure include name and pmu functions(event_int/add/del/read) as they are just used to copy them again in pmu variable. Now we are directly doing this step in arch specific code as suggested by Dan Williams. - Remove attribute group field from nvdimm pmu structure and defined these attribute groups in common interface which includes format, event list along with cpumask as suggested by Dan Williams. Since we added static defination for attrbute groups needed in common interface, removes corresponding code from papr. - Add nvdimm pmu event list with event codes in the common interface. - Remove Acked-by/Reviewed-by/Tested-by tags as code is refactored to handle review comments from Dan. - Make nvdimm_pmu_free_hotplug_memory function static as reported by kernel test robot, also add corresponding Reported-by tag. - Link to the patchset v4: https://lkml.org/lkml/2021/9/3/45 v3 -> v4 - Rebase code on top of current papr_scm code without any logical changes. - Added Acked-by tag from Peter Zijlstra and
