topic Re: Hyperthreading enabled? in Operating System - HP-UX

Hyperthreading enabled?

Jojo Castro — Mon, 23 Aug 2010 08:18:42 GMT

Hi all, im using HP-UX 11.23 on my RX6600 and SUPERDOME SD32B servers with MONTV_A1_1618 and MTV_A1_1618 processor respectively. HOw can i check if Hyperthreading is enabled? What is the default setting? Thanks!

Re: Hyperthreading enabled?

Dennis Handly — Mon, 23 Aug 2010 08:28:47 GMT

I believe you need 11.31 to enable and use it.

Re: Hyperthreading enabled?

Jojo Castro — Mon, 23 Aug 2010 08:32:15 GMT

Hyperthreading starts in 11.31?

Re: Hyperthreading enabled?

Dennis Handly — Mon, 23 Aug 2010 08:57:31 GMT

What does "machinfo" show for your servers?

Re: Hyperthreading enabled?

Ganesh Balraman — Mon, 23 Aug 2010 09:50:02 GMT

Just type
setboot

Re: Hyperthreading enabled?

Bhadresh — Mon, 23 Aug 2010 09:57:41 GMT

Hi,

you can use following command:
# getconf SC_HT_ENABLED

1 indicates hyperthreading is enabled
0 indicates hyperthreading is disabled

Regards,
Bhadresh

Re: Hyperthreading enabled?

Emil Velez — Tue, 24 Aug 2010 01:07:01 GMT

getconf lcpu_attr

Re: Hyperthreading enabled?

Jojo Castro — Tue, 24 Aug 2010 01:25:14 GMT

Hi Dennis,

Herewith is the machinfo.

CPU info:
Number of CPUs = 8
Clock speed = 1595 MHz
Bus speed = 532 MT/s
CPUID registers
vendor information = "GenuineIntel"
processor serial number = 0x0000000000000000
processor version info = 0x0000000020010104
architecture revision: 0
processor family: 32 Intel(R) Itanium 2 9100 series
processor model: 1 Intel(R) Itanium 2 9100 series
processor revision: 1 Stepping A1
largest CPUID reg: 4
processor capabilities = 0x0000000000000005
implements long branch: 1
implements 16-byte atomic operations: 1
Bus features
implemented = 0xbdf0000020000000
selected = 0x0000000000000000

Cache info (per core):
L1 Instruction: size = 16 KB, associativity = 4
L1 Data: size = 16 KB, associativity = 4
L2 Instruction: size = 1024 KB, associativity = 8
L2 Data: size = 256 KB, associativity = 8
L3 Unified: size = 9216 KB, associativity = 9

Hi Ganesh, herewith is setboot

# setboot
Primary bootpath : 0/4/1/0.0.0.2.0
HA Alternate bootpath : 0/0/2/0
Alternate bootpath : 0/4/1/0.0.0.1.0

Autoboot is ON (enabled)

Hi Bhadesh / Emil, both commands resulted to Invalid argument

# getconf SC_HT_ENABLED
getconf SC_HT_ENABLED: Invalid argument
# getconf lcpu_attr
getconf lcpu_attr: Invalid argument

Re: Hyperthreading enabled?

Don Morris_1 — Tue, 24 Aug 2010 02:37:28 GMT

Yes, this is a v3 feature. See the white paper:
http://h20195.www2.hp.com/v2/GetPDF.aspx/4AA0-7695ENW.pdf

Re: Hyperthreading enabled?

Dennis Handly — Tue, 24 Aug 2010 04:52:18 GMT

>processor family: 32 Intel(R) Itanium 2 9100 series
>processor model: 1 Intel(R) Itanium 2 9100 series

This is a Montvale processor which supports it but only on 11.31.

>Bhadresh: # getconf SC_HT_ENABLED

Doesn't seem to work on 11.23.

Re: Hyperthreading enabled?

Torsten. — Tue, 24 Aug 2010 05:37:16 GMT

HP-UX 11.23 cannot boot with ht switched to on. It will toggle this mode off and reboot.
To use hyperthreading you need to run 11.31.

Re: Hyperthreading enabled?

Jojo Castro — Tue, 31 Aug 2010 06:17:58 GMT

thanks for all the replies