pmem monitoring help

[Mohan Parthasarathy]

Hi,

I am looking for a way to monitor the following parameters of an NVDIMM (Optane). I have a couple of questions :

- Are there equivalent ndctl options to these ipmctl ones ?

- Is there a programmatic way (library) for me to get these values ? if yes, is there sample code available ?

- Is this information part of any standard Redfish schema ?

Regards,

Mohan

NVDIMM parameter	IPMCTL command	NDCTL command
Health	ipmctl show -dimm -sensor Health
Media Temperature	ipmctl show -dimm -sensor MediaTemperature
Controller temperature	ipmctl show -dimm -sensor ControllerTemperature
Percentage remaining	ipmctl show -dimm -sensor PercentageRemaining
MediaReads	ipmctl show -dimm -performance MediaReads
MediaWrites	ipmctl show -dimm -performance MediaWrites

[steve.s...@gmail.com]

Hello Mohan,

>> - Are there equivalent ndctl options to these ipmctl ones ?

No. ndctl is a generic nvdimm utility whereas ipmctl is a vendor-specific tool (Intel Persistent Memory Ctrl), capable of extracting more information from the Intel pmem devices. ndctl can show some basic health information, eg:

---

# ndctl list -DH

[

  {

    "dev":"nmem1",

    "id":"8089-a2-2014-00003dec",

    "handle":17,

    "phys_id":4359,

    "security":"disabled",

    "health":{

      "health_state":"ok",

      "temperature_celsius":42.0,

      "controller_temperature_celsius":46.0,

      "spares_percentage":100,

      "alarm_temperature":false,

      "alarm_controller_temperature":false,

      "alarm_spares":false,

      "alarm_enabled_media_temperature":false,

      "alarm_enabled_ctrl_temperature":false,

      "alarm_enabled_spares":false,

      "shutdown_state":"clean",

      "shutdown_count":0

    }

  },

---

>> - Is there a programmatic way (library) for me to get these values? if yes, is there a sample code available?

Yes, you can use libipmctl to obtain that information. The API doesn't have any documentation, but there is a C code example located at https://github.com/intel/ipmctl/blob/master/src/os/nvm_api_sample/main.c

>> - Is this information part of any standard Redfish schema ?

Most of it is available in the RedFish spec - https://www.dmtf.org/sites/default/files/standards/documents/DSP2046_2017.1.pdf. The server OEM platform management code needs to implement it. 

• HealthData   
  
• Temperatures

/Steve

[Mohan Parthasarathy]

Thanks, Steve. I tried building ipmctl on SLES 12 SP4 and am getting this error : /root/ipmctl/DcpmPkg/common/Pbr.c:821:3: error: call to function ‘PbrFreeSession’ without a real prototype [-Werror=unprototyped-calls]

Any ideas on what could be wrong?

Regards,

Mohan

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[Mohan Parthasarathy]

Sorry, Steve.  You can ignore my previous mail. I got it working. Thanks for your help.

Regards,

Mohan