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Date: Fri, 13 Dec 2002 00:19:56 GMT
From: Hubert Tournier <hubert@tournier.org>
Reply-To: Hubert Tournier <hubert@tournier.org>
To: FreeBSD-gnats-submit@freebsd.org
Cc:
Subject: CPU speed incorrectly reported
X-Send-Pr-Version: 3.113
X-GNATS-Notify:

>Number:         46222
>Category:       i386
>Synopsis:       CPU speed incorrectly reported
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Dec 12 15:20:01 PST 2002
>Closed-Date:    Sat Jul 12 16:18:37 PDT 2003
>Last-Modified:  Sat Jul 12 16:18:37 PDT 2003
>Originator:     Hubert Tournier <hubert@frbsd.org>
>Release:        FreeBSD 5.0-DP2 i386
>Organization:
Home
>Environment:
System: FreeBSD 5.0-DP2 FreeBSD 5.0-DP2 #1: Sat Nov 16 13:38:33 GMT 2002
root@tomcat.bmah.org:/usr/obj/usr/src/sys/GENERIC i386

Machine : Toshiba Satellite 4080XCDT laptop
(not running on battery)

>Description:

CPU speed is incorrectly reported : 185 MHz instead of 200 MHz.

Relevant parts of /var/log/messages follows :

--- part1 begins here ---
Nov 25 00:02:40  kernel: Timecounter "i8254"  frequency 1193182 Hz
Nov 25 00:02:40  kernel: Timecounter "TSC"  frequency 184527957 Hz
Nov 25 00:02:40  kernel: CPU: Pentium II/Pentium II Xeon/Celeron (184.53-MHz 686-class CPU)
Nov 25 00:02:40  kernel: Origin = "GenuineIntel"  Id = 0x66a  Stepping = 10
Nov 25 00:02:40  kernel: Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR>
Nov 25 00:02:40  kernel: acpi0: <TOSHIB 750     > on motherboard
Nov 25 00:02:40  kernel: Timecounter "ACPI-safe"  frequency 3579545 Hz
Nov 25 00:02:40  kernel: acpi_timer0: <24-bit timer at 3.579545MHz> port 0xfe08-0xfe0b on acpi0
Nov 25 00:02:41  kernel: pmtimer0 on isa0
Nov 25 00:02:41  kernel: Timecounters tick every 10.000 msec
--- part1 ends here ---

>How-To-Repeat:

Reboot.

>Fix:

>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->feedback 
State-Changed-By: dwmalone 
State-Changed-When: Mon Dec 23 02:57:24 PST 2002 
State-Changed-Why:  
The speed of the CPU is actually measured by seeing how many 
instructions are executed in an interval measured by the real time 
timer. This suggests that either your CPU is running slow or the 
timer is running fast. 

The CPU could be running slow because of APM or ACPI settings 
reducing power consumption by slowing the CPU. Can you look into 
this possibility? 

David. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=46222 
State-Changed-From-To: feedback->closed 
State-Changed-By: kris 
State-Changed-When: Sat Jul 12 16:18:27 PDT 2003 
State-Changed-Why:  
Feedback timeout 

http://www.freebsd.org/cgi/query-pr.cgi?pr=46222 
>Unformatted:
