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Date: Mon, 2 Apr 2001 15:58:13 +1200 (NZST)
From: Eric Gillespie <viking@flying-brick.caverock.net.nz>
To: linux-kernel@vger.kernel.org
Subject: System clock loses time at approx 17 secs per two hours
Message-ID: <Pine.LNX.4.21.0104021504320.6492-100000@brick.flying-brick.caverock.net.nz>
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First off, CC: back to me, as my machine can't handle an estimated 200
messages a day for me to sign up to the list 8-( - Anyway..

I updated my kernel to 2.4.3 when the patch was released. (Tarballs -
wonderful things!)

However, I noticed that the kernel timer loses seconds over time with both the
2.4.2 and 2.4.3 kernels (seems to be at a steady rate...), and the rate of
loss is NOT related to the CMOS clock. I compared against a 2.2.18 kernel,
which lost about 1 second in 14 hours - about what I'd expect with my
machine).

Now, has anybody else noticed their 2.4.x kernel losing time?  If so, and
anyone knows how I can fix it so it behaves like 2.2.18, I'd be grateful.

<offtopic>
Can't say I like the April Fools release on "behalf" of Linus.
</offtopic>

===================
Some relevant data:
 Linux version 2.4.3 (root@brick.flying-brick.caverock.net.nz)
 (gcc version 2.95.3 19991030 (prerelease)) #2 Sat Mar 31 09:52:39 NZST 2001

Software present (among others) 
Gnu C                  2.95.3          Gnu make               3.77
binutils               2.9.5.0.31      Linux C Library        2.2.2
Dynamic linker (ldd)   2.2.2

Processor information (from /proc/cpuinfo) for a Cyrix-M II-300:
processor	: 0
vendor_id	: CyrixInstead
cpu family	: 6
model		: 2
model name	: M II 3.5x Core/Bus Clock
stepping	: 8
cpu MHz		: 233.030
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 1
wp		: yes
flags		: fpu de tsc msr cx8 pge cmov mmx cyrix_arr
bogomips	: 465.30

Loaded driver and hardware information (/proc/ioports, /proc/iomem)
==Drivers==
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
0213-0213 : isapnp read
0220-022f : soundblaster
02f8-02ff : serial(auto)
0300-031f : eth0
0376-0376 : ide1
0388-038b : Yamaha OPL3
03c0-03df : vesafb
03f6-03f6 : ide0
0a79-0a79 : isapnp write
0cf8-0cff : PCI conf1
4000-400f : Silicon Integrated Systems [SiS] 5513 [IDE]
  4000-4007 : ide0
  4008-400f : ide1
e000-e07f : Silicon Integrated Systems [SiS] 5597/5598 VGA
==memory info==
00000000-0009efff : System RAM
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000f0000-000fffff : System ROM
00100000-01cfffff : System RAM
  00100000-001e9c4f : Kernel code
  001e9c50-002445d7 : Kernel data
08000000-082fffff : vesafb
e1000000-e13fffff : Silicon Integrated Systems [SiS] 5597/5598 VGA
e1400000-e140ffff : Silicon Integrated Systems [SiS] 5597/5598 VGA
e1410000-e141ffff : Rockwell International HCF 56k V90 FaxModem
[7.5.] PCI information ('lspci -vvv' as root)
==PCI Information==

00:00.0 Host bridge: Silicon Integrated Systems [SiS] 5597 [SiS5582] (rev 10)
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR-
	Latency: 64 set

00:01.0 ISA bridge: Silicon Integrated Systems [SiS] 85C503/5513 (rev 01)
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0 set

00:01.1 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev d0) (prog-if 8a [Master SecP PriP])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 64 set
	Interrupt: pin A routed to IRQ 14
	Region 0: I/O ports at <ignored>
	Region 1: I/O ports at <ignored>
	Region 2: I/O ports at <ignored>
	Region 3: I/O ports at <ignored>
	Region 4: I/O ports at 4000 [size=16]

00:0b.0 Serial controller: Rockwell International HCF 56k V90 FaxModem (rev 01) (prog-if 00 [8250])
	Subsystem: Aztech System Ltd MDP3858SP-A SVD Modem
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 64 set
	Interrupt: pin A routed to IRQ 11
	Region 0: Memory at e1410000 (32-bit, non-prefetchable) [size=64K]
	Capabilities: [40] Power Management version 1
		Flags: PMEClk- AuxPwr+ DSI+ D1+ D2+ PME+
		Status: D0 PME-Enable- DSel=0 DScale=3 PME-

00:14.0 VGA compatible controller: Silicon Integrated Systems [SiS] 5597/5598 VGA (rev 68) (prog-if 00 [VGA])
	Subsystem: Silicon Integrated Systems [SiS]: Unknown device 0200
	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Interrupt: pin A routed to IRQ 0
	Region 0: Memory at e1000000 (32-bit, prefetchable) [size=4M]
	Region 1: Memory at e1400000 (32-bit, non-prefetchable) [size=64K]
	Region 2: I/O ports at e000 [size=128]
	Expansion ROM at <unassigned> [disabled] [size=32K]



-- 
 /|   _,.:*^*:.,   |\           Cheers from the Viking family, 
| |_/'  viking@ `\_| |            including Pippin, our cat
|    flying-brick    | $FunnyMail  Bilbo   : Now far ahead the Road has gone,
 \_.caverock.net.nz_/     5.39    in LOTR  : Let others follow it who can!


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