(Intel Core 2 Duo 2.4gig 4meg cache + Intel S3000AH + Linux) - ACPI kernel option = 1 core?
A message that is not in the archive (sent off-list or not yet received): [email protected]
Hey guys
I've been configuring up a Linux 2.6.21.1 kernel from Linus' trusty kernel.org.
I configured it up and built it and noticed that the dual core CPU I was using is now a single core chip.
I've spent alittle time on this problem and think I found out how to enable or disable the single core. My base config is:
- Processor - SMP On
- Processor - SMT/Hyperthreading scheduler On
- Processor - Multicore scheduler On
- Processor - Optimize for any CPU type (ie P4, Core2, i586) or base system (ie BigSMB/summit or PC-compatible)
- Power management support On
- All other power management pieces turned off
- All other options are set standard by 'make mrproper'
I compile the kernel with ACPI off and I get 1 cpu/cpu-core.
I then recompile with just the ACPI turned on (ie havn't turned on Processor, Fan or any other modules there) and I get to see my second core.
This server will be well ventilated and will be running multiple VM's. To guarantee performance I'd like to have ACPI turned off.
I can also say that this bug seems to be present in 2.6.18 as well.
So I guess my question is, has this issue been fixed? Or how can I help to fix it?
Cheers,
Steve
Quoted 10 lines
-----Original Message-----
From: [email protected] [mailto:linux-acpi- [email protected]] On Behalf Of Steve Evans
Sent: Tuesday, May 29, 2007 9:16 AM
To: [email protected]
Subject: (Intel Core 2 Duo 2.4gig 4meg cache + Intel S3000AH + Linux) - ACPI kernel option = 1 core?
Quoted 6 lines
Hey guys
I've been configuring up a Linux 2.6.21.1 kernel from Linus' trusty kernel.org.
I configured it up and built it and noticed that the dual core CPU I
was
Quoted 13 lines
using is now a single core chip.
I've spent alittle time on this problem and think I found out how to enable or disable the single core. My base config is:
- Processor - SMP On
- Processor - SMT/Hyperthreading scheduler On
- Processor - Multicore scheduler On
- Processor - Optimize for any CPU type (ie P4, Core2, i586) or base system (ie BigSMB/summit or PC-compatible)
- Power management support On
- All other power management pieces turned off
- All other options are set standard by 'make mrproper'
Quoted 4 lines
I compile the kernel with ACPI off and I get 1 cpu/cpu-core.
I then recompile with just the ACPI turned on (ie havn't turned on Processor, Fan or any other modules there) and I get to see my second
core.
Quoted 7 lines
This server will be well ventilated and will be running multiple VM's. To guarantee performance I'd like to have ACPI turned off.
I can also say that this bug seems to be present in 2.6.18 as well.
So I guess my question is, has this issue been fixed? Or how can I
help
Quoted 2 lines
to fix it?
Boot option 'acpi=ht'
A message that is not in the archive (sent off-list or not yet received): [email protected]
Quoted 54 lines · Steven Evans
Quoted 43 lines · Shaohua
Quoted 9 lines
-----Original Message-----
From: [email protected] [mailto:linux-acpi- [email protected]] On Behalf Of Steve Evans
Sent: Tuesday, May 29, 2007 9:16 AM
To: [email protected]
Subject: (Intel Core 2 Duo 2.4gig 4meg cache + Intel S3000AH + Linux) - ACPI kernel option = 1 core?Quoted 7 lines
Hey guys
I've been configuring up a Linux 2.6.21.1 kernel from Linus' trusty kernel.org.
I configured it up and built it and noticed that the dual core CPU I
was
Quoted 13 lines
using is now a single core chip.
I've spent alittle time on this problem and think I found out how to enable or disable the single core. My base config is:
- Processor - SMP On
- Processor - SMT/Hyperthreading scheduler On
- Processor - Multicore scheduler On
- Processor - Optimize for any CPU type (ie P4, Core2, i586) or base system (ie BigSMB/summit or PC-compatible)
- Power management support On
- All other power management pieces turned off
- All other options are set standard by 'make mrproper'Quoted 5 lines
I compile the kernel with ACPI off and I get 1 cpu/cpu-core.
I then recompile with just the ACPI turned on (ie havn't turned on Processor, Fan or any other modules there) and I get to see my second
core.
Quoted 5 lines
This server will be well ventilated and will be running multiple VM's. To guarantee performance I'd like to have ACPI turned off.
I can also say that this bug seems to be present in 2.6.18 as well.
Quoted 10 lines
Quoted 2 lines
So I guess my question is, has this issue been fixed? Or how can I
help
Quoted 3 lines
to fix it?
Boot option 'acpi=ht'
Quoted 7 lines
Hi,
Thanks for that. I found that I needed the "irqpoll" option there as well to get the SATA working.
Is there anything else I need to know to ensure it will remain fast and stable?
Looks no option just use ACPI as MP detect and irq routing. But why do you want to disable ACPI? Just cpufreq governor 'performance', which should not harm performance.
Thanks,
Shaohua