x86 expected to show 2 virtual processors per core, but only shows 1
(Doc ID 2209744.1)
Last updated on SEPTEMBER 12, 2019
Applies to:
Solaris x64/x86 Operating System - Version 10 3/05 and laterInformation in this document applies to any platform.
Symptoms
On x86 systems supporting hyperthreading, psrinfo -pv is expected to show output containing something similar to this:
The physical processor has 8 cores and 16 virtual processors (0-7,16-23)
The core has 2 virtual processors (0,16)
The core has 2 virtual processors (1,17)
The core has 2 virtual processors (2,18)
The core has 2 virtual processors (3,19)
The core has 2 virtual processors (4,20)
The core has 2 virtual processors (5,21)
The core has 2 virtual processors (6,22)
The core has 2 virtual processors (7,23)
x86 (GenuineIntel 306E4 family 6 model 62 step 4 clock 2600 MHz)
Intel(r) Xeon(r) CPU E5-2650 v2 @ 2.60GHz
The physical processor has 8 cores and 16 virtual processors (8-15,24-31)
The core has 2 virtual processors (8,24)
The core has 2 virtual processors (9,25)
The core has 2 virtual processors (10,26)
The core has 2 virtual processors (11,27)
The core has 2 virtual processors (12,28)
The core has 2 virtual processors (13,29)
The core has 2 virtual processors (14,30)
The core has 2 virtual processors (15,31)
x86 (GenuineIntel 306E4 family 6 model 62 step 4 clock 2600 MHz)
Intel(r) Xeon(r) CPU E5-2650 v2 @ 2.60GHz
Should the issue happen, psrinfo -pv shows something like this instead:
The physical processor has 8 virtual processors (0-7)
x86 (GenuineIntel 306E4 family 6 model 62 step 4 clock 2600 MHz)
Intel(r) Xeon(r) CPU E5-2650 v2 @ 2.60GHz
The physical processor has 8 virtual processors (8-15)
x86 (GenuineIntel 306E4 family 6 model 62 step 4 clock 2600 MHz)
Intel(r) Xeon(r) CPU E5-2650 v2 @ 2.60GHz
When the system is booted, messages similar to these appear:
2016-09-03T04:15:35.308322+00:00 hostname acpidev: [ID 850883 kern.warning] WARNING: acpidev: failed to initialize acpica subsystem.
2016-09-03T04:15:35.308326+00:00 hostname acpidev: [ID 287759 kern.warning] WARNING: acpidev: driver disabled due to initalization failure.
2016-09-03T04:15:35.308329+00:00 hostname acpica: [ID 566992 kern.warning] WARNING: isa_enum: init failed
2016-09-03T04:15:35.308333+00:00 hostname isa: [ID 930810 kern.info] NOTICE: Solaris did not detect ACPI BIOS
2016-09-03T04:15:35.308352+00:00 hostname isa: [ID 477837 kern.info] NOTICE: ACPI is off
Cause
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In this Document
Symptoms |
Cause |
Solution |