[Linux-ia64] Re: Detecting SMP in user space

[Linux-ia64] Re: Detecting SMP in user space

[Bill Nottingham]

Andreas Schwab (schwab@suse.de) said: 
> |> How about simply running 'top' or a 'dmesg | grep CPU'?
> 
> As I already said, I'm running a UP kernel, thus top only ever sees one
> CPU.  The latter fails if the boot messages have already been cleared from
> the kernel log.

I believe the ACPI boot messages on ia64 tell you how many processors
it found.

Bill

Re: [Linux-ia64] Re: Detecting SMP in user space

[Andreas Schwab]

Bill Nottingham <notting@redhat.com> writes:

|> Andreas Schwab (schwab@suse.de) said: 
|> > |> How about simply running 'top' or a 'dmesg | grep CPU'?
|> > 
|> > As I already said, I'm running a UP kernel, thus top only ever sees one
|> > CPU.  The latter fails if the boot messages have already been cleared from
|> > the kernel log.
|> 
|> I believe the ACPI boot messages on ia64 tell you how many processors
|> it found.

How can I get at the ACPI boot messages if the kernel log is already
cleared?

Andreas.

-- 
Andreas Schwab                                  "And now for something
SuSE Labs                                        completely different."
Andreas.Schwab@suse.de
SuSE GmbH, Schanzäckerstr. 10, D-90443 Nürnberg
Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5

Re: [Linux-ia64] Re: Detecting SMP in user space

[Don Dugger]

Andreas-

On my system the boot messages are copied into `/var/log/messages'
so you can always go there even if the boot log is cleared.

On Thu, Apr 19, 2001 at 02:56:17PM +0200, Andreas Schwab wrote:
> Bill Nottingham <notting@redhat.com> writes:
> 
> |> Andreas Schwab (schwab@suse.de) said: 
> |> > |> How about simply running 'top' or a 'dmesg | grep CPU'?
> |> > 
> |> > As I already said, I'm running a UP kernel, thus top only ever sees one
> |> > CPU.  The latter fails if the boot messages have already been cleared from
> |> > the kernel log.
> |> 
> |> I believe the ACPI boot messages on ia64 tell you how many processors
> |> it found.
> 
> How can I get at the ACPI boot messages if the kernel log is already
> cleared?
> 
> Andreas.
> 
> -- 
> Andreas Schwab                                  "And now for something
> SuSE Labs                                        completely different."
> Andreas.Schwab@suse.de
> SuSE GmbH, Schanzäckerstr. 10, D-90443 Nürnberg
> Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
> 
> _______________________________________________
> Linux-IA64 mailing list
> Linux-IA64@linuxia64.org
> http://lists.linuxia64.org/lists/listinfo/linux-ia64

-- 
Don Dugger
"Censeo Toto nos in Kansa esse decisse." - D. Gale
n0ano@valinux.com
Ph: 303/938-9838

Re: [Linux-ia64] Re: Detecting SMP in user space

[Andreas Schwab]

Don Dugger <n0ano@valinux.com> writes:

|> Andreas-
|> 
|> On my system the boot messages are copied into `/var/log/messages'
|> so you can always go there even if the boot log is cleared.

This is not reliable.  I need something that I can use without depending
on the kernel messages.  Is it possible to get at the ACPI tables in user
space?

Andreas.

-- 
Andreas Schwab                                  "And now for something
SuSE Labs                                        completely different."
Andreas.Schwab@suse.de
SuSE GmbH, Schanzäckerstr. 10, D-90443 Nürnberg
Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5

RE: [Linux-ia64] Re: Detecting SMP in user space

[Dunlap, Randy]

At least on i386, root can read the ACPI tables from
/dev/mem (as done in the pmtools [acpitools] package).


~Randy________________________
-----------------------------------------------

> -----Original Message-----
> From: Andreas Schwab [mailto:schwab@suse.de]
> Sent: Thursday, April 19, 2001 7:31 AM
> To: Don Dugger
> Cc: linux-ia64@linuxia64.org
> Subject: Re: [Linux-ia64] Re: Detecting SMP in user space
> 
> 
> Don Dugger <n0ano@valinux.com> writes:
> 
> |> Andreas-
> |> 
> |> On my system the boot messages are copied into `/var/log/messages'
> |> so you can always go there even if the boot log is cleared.
> 
> This is not reliable.  I need something that I can use 
> without depending
> on the kernel messages.  Is it possible to get at the ACPI 
> tables in user space?
> 
> Andreas.

Re: [Linux-ia64] Re: Detecting SMP in user space

[Andreas Schwab]

"Dunlap, Randy" <randy.dunlap@intel.com> writes:

|> At least on i386, root can read the ACPI tables from
|> /dev/mem (as done in the pmtools [acpitools] package).

Where can I get this package?

Andreas.

-- 
Andreas Schwab                                  "And now for something
SuSE Labs                                        completely different."
Andreas.Schwab@suse.de
SuSE GmbH, Schanzäckerstr. 10, D-90443 Nürnberg
Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5

RE: [Linux-ia64] Re: Detecting SMP in user space

[Dunlap, Randy]

At the bottom of
http://developer.intel.com/technology/IAPC/acpi/downloads.htm


~Randy________________________503-677-5408_____
-----------------------------------------------

> -----Original Message-----
> From: Andreas Schwab [mailto:schwab@suse.de]
> 
> "Dunlap, Randy" <randy.dunlap@intel.com> writes:
> 
> |> At least on i386, root can read the ACPI tables from
> |> /dev/mem (as done in the pmtools [acpitools] package).
> 
> Where can I get this package?

Re: [Linux-ia64] Re: Detecting SMP in user space

[Andreas Schwab]

"Dunlap, Randy" <randy.dunlap@intel.com> writes:

|> At the bottom of
|> http://developer.intel.com/technology/IAPC/acpi/downloads.htm

Thanks, this works fine for BigSur.  But on Lion I only get:

RSDP "MSLSAL" @ 0x000f57b0
  0000: 52 53 44 20 50 54 52 20 00 4d 53 4c 53 41 4c 00  RSD PTR .MSLSAL.
  0010: 00 00 00 00                                      ....

acpidmp: cannot map the RSDT

Andreas.

-- 
Andreas Schwab                                  "And now for something
SuSE Labs                                        completely different."
Andreas.Schwab@suse.de
SuSE GmbH, Schanzäckerstr. 10, D-90443 Nürnberg
Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5

RE: [Linux-ia64] Re: Detecting SMP in user space

[Dunlap, Randy]

Ah, without actually looking at the code, I believe that
you have proven that acpidmp doesn't understand ACPI 2.0
data structures.

Sorry about that.  I don't know what the plans are for
updating acpidmp (if any).

~Randy________________________503-677-5408_____
----------------------------------------------- 

> -----Original Message-----
> From: Andreas Schwab [mailto:schwab@suse.de]
> 
> "Dunlap, Randy" <randy.dunlap@intel.com> writes:
> 
> |> At the bottom of
> |> http://developer.intel.com/technology/IAPC/acpi/downloads.htm
> 
> Thanks, this works fine for BigSur.  But on Lion I only get:
> 
> RSDP "MSLSAL" @ 0x000f57b0
>   0000: 52 53 44 20 50 54 52 20 00 4d 53 4c 53 41 4c 00  RSD 
> PTR .MSLSAL.
>   0010: 00 00 00 00                                      ....
> 
> acpidmp: cannot map the RSDT
> 
> Andreas.

Re: [Linux-ia64] Re: Detecting SMP in user space

[Andreas Schwab]

"Dunlap, Randy" <randy.dunlap@intel.com> writes:

|> Ah, without actually looking at the code, I believe that
|> you have proven that acpidmp doesn't understand ACPI 2.0
|> data structures.

I don't think this is a problem with ACPI 2.0.  The Lions have the ACPI
structures (both pre 2.0 and 2.0) located at adresses above 0x3f000000,
but acpidump only looks at the region 0xe0000 to 0x100000.  The structure
located at 0x000f57b0 doesn't contain a valid ACPI 2.0 structure either
(the xsdt pointer is garbage).

Andreas.

-- 
Andreas Schwab                                  "And now for something
SuSE Labs                                        completely different."
Andreas.Schwab@suse.de
SuSE GmbH, Schanzäckerstr. 10, D-90443 Nürnberg
Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5