only see cpu0 working after rebuilding kernel with SMP support

[Mathieu CHATEAU]

Hello Lei,

i agree with you. I have he same trouble.

kern.threads.virtual_cpu: 2
kern.smp.cpus: 2
hw.ncpu: 2
hw.acpi.cpu.cx_supported: C1/0
hw.acpi.cpu.cx_lowest: C1
hw.acpi.cpu.cx_usage: 100.00%
machdep.cpu_idle_hlt: 0
machdep.hlt_cpus: 2
machdep.hlt_logical_cpus: 0
machdep.logical_cpus_mask: 2
dev.cpu.0.%desc: ACPI CPU
dev.cpu.0.%driver: cpu
dev.cpu.0.%location: handle=\_PR_.CPU0
dev.cpu.0.%pnpinfo: _HID=none _UID=0
dev.cpu.0.%parent: acpi0
dev.cpu.1.%desc: ACPI CPU
dev.cpu.1.%driver: cpu
dev.cpu.1.%location: handle=\_PR_.CPU1
dev.cpu.1.%pnpinfo: _HID=none _UID=0
dev.cpu.1.%parent: acpi0

machdep.hlt_cpus: 2 looks strange to me.

any clue ?



Friday, July 22, 2005, 6:47:47 PM, you wrote:

LS> Yes, I read that security advisory as well, and I see

LS> -----------------------
LS> NOTE:  For users that are certain that their environment is not affected
LS> by this vulnerability, such as single-user systems, Hyper-Threading
LS> Technology may be re-enabled by setting the tunable
LS> "machdep.hyperthreading_allowed".
LS> -----------------------

LS> so I "echo "machdep.hyperthreading_allowed" >> /boot/load.conf", then reboot.

LS> But still only 1 CPU is running.

LS> Thanks in advance :)

LS> Lei

LS> On 7/22/05, Andreas Rudisch <"cyb."@gmx.net> wrote:
>> On Fri, 2005-07-22 at 00:12 -0700, Lei Sun wrote:
>> > Hi,
>> > I wanted to enable the second logical CPU on my P4 HT. and...
>> > Something seems to be strange to me as:
>> >
>> > All of the processes are running with CPU0 and none is working with CPU1
>> 
>> > Here is the steps and places I read and followed
>> >
>> > 1. I followed the custom kernel documents from
>> >
>> http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-building.html
>> >
>> http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html
>> > http://www.freebsddiary.org/smp.php
>> >
>> > and compiled the custom kernel
>> >
>> > and my kernel config:
>> > -------------------------------------------------
>> > ...
>> > options         SMP
>> > device          apic                    # I/O APIC
>> > ...
>> > -------------------------------------------------
>> >
>> > 2. Then I compiled the custom kernel, and installed it
>> >
>> > 3. I check the startup output, and found
>> > SMP: AP CPU #1 Launched!
>> >
>> > So my question is, how come in top, only cpu0 is working, and no entry for cpu1?
>> >
>> > Thanks in advance:)
>> >
>> > Lei
>> 
>> 
>> Take a look at this:
>> 
>> ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:09.htt.asc
>> 
>> Andreas.
>> 
>> --
>> GnuPG key  : 0xD25FCC81  |  http://cyb.websimplex.de/pubkey.asc
>> Fingerprint: D182 6F22 7EEC DD4C 0F6E  564C 691B 0372 D25F CC81
>> 
>> 
>> 
>> 
>> 
>> -----BEGIN PGP SIGNATURE-----
>> Version: GnuPG v1.4.1 (FreeBSD)
>> 
>> iD8DBQBC4LgAaRsDctJfzIERAtX8AJ9fJBbODWbOxymKEFeHNpULtUrecACfYsWG
>> IcmXfXCmO9ZpgCxDOlOwQWc=
>> =zfk/
>> -----END PGP SIGNATURE-----
>> 
>> 
>>
LS> _______________________________________________
LS> freebsd-questions at freebsd.org mailing list
LS> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
LS> To unsubscribe, send any mail to
LS> "freebsd-questions-unsubscribe at freebsd.org"



-- 
Best regards,
 Mathieu                            mailto:gollum123 at free.fr