Xeon D1548 (GG8067402569300 SR2DJ) CORE 0 Clock Degraded to 800MHz due to External PROCHOT

GirishCiena · ‎02-13-2023

Hello,

We are facing a field Issue related to the performance degradation, we had noticed the core 0 clock degraded to the 800MHz,
This problem occurs after few days. After the initial level debugging we got to know by reading MSR_CORE_PERF_LIMIT_REASONS = e009a001,
as per the Register description when bit 0 set it means there is an External PROCHOT activated due to this core 0 clock degraded,
Now How do we debug this? we saw there is no rise in temperature and this situation persists until reboot.

Below is what we tried to read:

cpu0: PKG Limit #1: ENabled (45.000000 Watts, 1.000000 sec, clamp ENabled)
cpu0: PKG Limit #2: ENabled (54.000000 Watts, 0.007812* sec, clamp ENabled)
...
cpu0: DRAM Limit: DISabled (0.000000 Watts, 0.000977 sec, clamp DISabled)
...
cpu0: MSR_IA32_TEMPERATURE_TARGET: 0x00681600 (104 C)
cpu0: MSR_IA32_PACKAGE_THERM_STATUS: 0x8832000c (54 C)
cpu0: MSR_IA32_PACKAGE_THERM_INTERRUPT: 0x00000003 (104 C, 104 C)
...
CoreTmp PkgTmp PkgWatt RAMWatt PKG_% RAM_%
54 54 18.85 3.86 100.02 3.01

We are using Xeon D1548 (Intel P/N: GG8067402569300 SR2DJ),
480GB SSD (Swissbit AG P/N: SFSA480GM6AA4TO-C-OC-616-G30 and 2 X 16GB DIMM (Smart Modular P/N: SHB722G8CIE24KP2SB).

Thanks In Advance

Allan_A_Intel · ‎02-14-2023

Hello, GirishCiena,

Thank you for reaching Intel Communities. I will gladly help you.

Your debug datails show the degradation seems to be relate to power and/or thermal limitations. What is the motherboard's brand and model, the BIOS version in your motherboard, and are you using an uninterruptible power supply or battery backup with that system?

Best regards,

Allan

Allan_A_Intel · ‎03-02-2023

Hello, GirishCiena,

If you need more information about the Xeon D-1500 processor, I suggest you to post your questions in the Intel Communities Support Forums for Embedded Products: https://community.intel.com/t5/Embedded-Products/ct-p/embedded-products

Regards,

Allan