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12-04-2020 09:20 AM
12-04-2020 09:20 AM
Hyperthreading gets disabled after every reboot
Running HP-UX 11.31 on Itanium server rx2800
I have set threads on at the EFI prompt: cpuconfig threads on
setboot -v
Autoboot is ON (enabled)
Hyperthreading : ON
: ON (next boot)
And I have set the kctune lcpu_attr=1 from smh
kctune -q lcpu_attr
Tunable Value Expression Changes
lcpu_attr (now) 0 0 Imm (auto disabled)
(next boot) 1 1
Everytime that I reboot, the kctune returns the same value. That it currently is 0 but on the next boot it will be 1.
Here is the output of /stand
ls -l /stand
total 265792
-rw-r--r-- 1 root sys 0 Oct 14 12:03 .kc.lock
drwxr-xr-x 5 root sys 8192 Dec 3 15:56 backup
dr-xr-xr-x 3 bin bin 96 Oct 14 12:03 boot.sys
-rw-r--r-- 1 root sys 22 Oct 14 11:46 bootconf
lrwxr-xr-x 1 root root 14 Dec 3 17:21 bootfs -> current/bootfs
drwxr-xr-x 5 root sys 8192 Dec 3 15:52 current
-rw-r--r-- 1 root sys 12232 Dec 3 17:21 ext_ioconfig
-rw-r--r-- 1 root sys 12232 Dec 3 17:21 ext_ioconfig.lkg
-rw-r--r-- 1 root sys 7288 Dec 3 17:21 ioconfig
-rw-r--r-- 1 root sys 7288 Dec 3 17:21 ioconfig.lkg
drwxr-xr-x 2 root sys 96 Dec 3 17:22 krs
drwxr-xr-x 5 root sys 8192 Oct 14 13:38 last_install
drwxr-xr-x 5 root sys 8192 Dec 3 14:31 lcpu_change
drwxr-xr-x 2 root root 96 Oct 14 11:45 lost+found
drwxr-xr-x 5 root sys 8192 Dec 3 14:59 newbuild
lrwxr-xr-x 1 root root 7 Dec 3 17:21 nextboot -> current
-rw------- 1 root root 40 Dec 3 17:21 rootconf
lrwxr-xr-x 1 root root 15 Dec 3 17:21 system -> nextboot/system
-rw-r--r-- 1 root sys 4989 Nov 30 16:17 system.prev
-rwxr-xr-x 5 root sys 135967224 Nov 30 16:47 vmunix
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12-05-2020 08:17 AM
12-05-2020 08:17 AM
Re: Hyperthreading gets disabled after every reboot
Sounds like this: https://support.hpe.com/hpesc/public/docDisplay?docId=emr_na-c01066005
Have you tried "setboot -m on" ?
I am an HPE Employee
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12-05-2020 08:24 AM
12-05-2020 08:24 AM
Re: Hyperthreading gets disabled after every reboot
Yes, and I still get the same results. It's like the next reboot kernel never gets put into place.
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12-05-2020 02:34 PM - edited 12-05-2020 02:35 PM
12-05-2020 02:34 PM - edited 12-05-2020 02:35 PM
Re: Hyperthreading gets disabled after every reboot
This server doesn't have the Integrity Virtual Machines software installed does it? I'm pretty sure that forces hyperthreading to be permanently off.
I am an HPE Employee
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12-05-2020 05:21 PM
12-05-2020 05:21 PM
Re: Hyperthreading gets disabled after every reboot
No, it doesn't have Intergrity VM installed.
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12-06-2020 05:50 AM
12-06-2020 05:50 AM
Re: Hyperthreading gets disabled after every reboot
>> No, it doesn't have Intergrity VM installed.
Are you completely sure? You don't get anything from running:
# hpvminfo
I am an HPE Employee
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12-07-2020 07:17 AM
12-07-2020 07:17 AM
Re: Hyperthreading gets disabled after every reboot
I get the following:
hpvminfo: Not on an HPVM guest, HPVM vPar or HPVM host.
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12-08-2020 11:46 PM
12-08-2020 11:46 PM
Re: Hyperthreading gets disabled after every reboot
which is good... I'm out of ideas - have you tried changing another kernel parameter that requires a reboot to change, just so you can confirm if this is a problem with kernel chnages in general or something specific to hyperthreading?
I am an HPE Employee
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12-09-2020 08:24 AM
12-09-2020 08:24 AM
Re: Hyperthreading gets disabled after every reboot
I can change other kernel parameters without any problems. Appears to just be hyperthreading not getting changed.