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Subjectsis630/celeron perf sucks?
Has anyone out there seen similar problems with SIS630 motherboards?
I know that we discussed this recently and people said that the graphics
chip is eating memory bandwidth but I am not using it, it isn't even in
SVGA mode, it's in text mode and screen blanked. I also tried setting
the AGP mem down to 2MB and that made no difference.

The reason I care is that I like these little cheap boxes called "book pcs"
and the older model was BK810 and used the i810 chipset but the newer ones
are BK630 and use the SIS630 chipset.

The new ones suck on all the stuff I care about, compiles, BitKeeper
regressions, just general software dev stuff.

Any insight appreciated.

----- Forwarded message from Larry McVoy <lm@bitmover.com> -----

From: Larry McVoy <lm@bitmover.com>
Date: Sat, 6 Oct 2001 13:02:36 -0700
To: wscott@bitmover.com
Subject: sis/celeron perf sucks?
Cc: lm@bitmover.com

This is a 633mhz system on PC133 mem
CPU: L1 I cache: 16K, L1 D cache: 16K
CPU: L2 cache: 128K
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
CPU: After vendor init, caps: 0383f9ff 00000000 00000000 00000000
CPU: After generic, caps: 0383f9ff 00000000 00000000 00000000
CPU: Common caps: 0383f9ff 00000000 00000000 00000000
CPU: Intel Celeron (Coppermine) stepping 06

And this is a 466Mhz system on unknown (probably PC66 or PC100) mem:
CPU: Before vendor init, caps: 0183f9ff 00000000 00000000, vendor = 0
CPU: L1 I cache: 16K, L1 D cache: 16K
CPU: L2 cache: 128K
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
CPU: After vendor init, caps: 0183f9ff 00000000 00000000 00000000
CPU: After generic, caps: 0183f9ff 00000000 00000000 00000000
CPU: Common caps: 0183f9ff 00000000 00000000 00000000
CPU: Intel Celeron (Mendocino) stepping 05

The bummer is that the memory subsystem sucks doggy doo doo on the former.
Is this a motherboard problem or do the newer celerons suck that bad on
purpose?

Check out the bandwidth stuff, the second row should be faster but isn't:

L M B E N C H 1 . 9 S U M M A R Y
------------------------------------
(Alpha software, do not distribute)

Processor, Processes - times in microseconds - smaller is better
----------------------------------------------------------------
Host OS Mhz null null open selct sig sig fork exec sh
call I/O stat clos inst hndl proc proc proc
--------- ------------- ---- ---- ---- ---- ---- ----- ---- ---- ---- ---- ----
i686-linu Linux 2.4.3-2 468 0.6 0.9 5 7 0.06K 1.8 5 0.4K 3K 15K
i686-linu Linux 2.4.2-2 634 0.5 0.7 4 5 0.03K 1.3 3 0.7K 4K 17K

Context switching - times in microseconds - smaller is better
-------------------------------------------------------------
Host OS 2p/0K 2p/16K 2p/64K 8p/16K 8p/64K 16p/16K 16p/64K
ctxsw ctxsw ctxsw ctxsw ctxsw ctxsw ctxsw
--------- ------------- ----- ------ ------ ------ ------ ------- -------
i686-linu Linux 2.4.3-2 1 9 137 40 207 60 209
i686-linu Linux 2.4.2-2 0 5 214 82 469 133 470

*Local* Communication latencies in microseconds - smaller is better
-------------------------------------------------------------------
Host OS 2p/0K Pipe AF UDP RPC/ TCP RPC/ TCP
ctxsw UNIX UDP TCP conn
--------- ------------- ----- ----- ---- ----- ----- ----- ----- ----
i686-linu Linux 2.4.3-2 1 8 14 27 45 180
i686-linu Linux 2.4.2-2 0 5 9 26 33 188

File & VM system latencies in microseconds - smaller is better
--------------------------------------------------------------
Host OS 0K File 10K File Mmap Prot Page
Create Delete Create Delete Latency Fault Fault
--------- ------------- ------ ------ ------ ------ ------- ----- -----
i686-linu Linux 2.4.3-2 14 1 27 2 385 1 0.0K
i686-linu Linux 2.4.2-2 9 1 38 5 274 0 0.0K

*Local* Communication bandwidths in MB/s - bigger is better
-----------------------------------------------------------
Host OS Pipe AF TCP File Mmap Bcopy Bcopy Mem Mem
UNIX reread reread (libc) (hand) read write
--------- ------------- ---- ---- ---- ------ ------ ------ ------ ---- -----
i686-linu Linux 2.4.3-2 192 68 49 161 284 109 111 284 158
i686-linu Linux 2.4.2-2 93 30 15 82 140 42 42 140 53

Memory latencies in nanoseconds - smaller is better
(WARNING - may not be correct, check graphs)
---------------------------------------------------
Host OS Mhz L1 $ L2 $ Main mem Guesses
--------- ------------- --- ---- ---- -------- -------
i686-linu Linux 2.4.3-2 468 6 159 203
i686-linu Linux 2.4.2-2 634 4 133 230

----- End forwarded message -----

--
---
Larry McVoy lm at bitmover.com http://www.bitmover.com/lm
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