I use bookpcs - all in one, really nice form factor - for build machines,
firewalls (with a USB ethernet), etc. I used the first generation which
had intel i810 graphics (sucked) but had fairly typical performance,
competitive for kernel builds with other current platforms at the time.
I recently bought a couple of the second generation of these boxes, these
have an SIS 630E based motherboard. This has a much better graphics interface,
quite reasonable at 1280x1024, and all the other bits work fine under RH 7.1
without tweaking.
Performance sucks, however. I did an LMbench run to try and figure out why
and it's obvious - the memory latencies are 430 ns - that's 2x more than
what is reasonable. I tweaked the various bios settings a bit and could
not get it to change much, maybe 20ns but not the 200ns I was looking for.
The fact that this system is running a celeron with a dinky cache makes it
feel really slow. These boxes with a 633Mhz celeron feel slower than the
old boxes with a 400Mhz celeron.
All I want to know is if this is in fact the real memory latency for these
motherboards. Anyone know for sure?
Here's what I could dig out of /proc:
PCI bus devices:
Host bridge: Silicon Integrated Systems [SiS] 630 Host (rev 32).
IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev 208).
ISA bridge: Silicon Integrated Systems [SiS] 85C503/5513 (rev 0).
Ethernet controller: Silicon Integrated Systems [SiS] SiS900 10/100 Ethernet (rev 129).
USB Controller: Silicon Integrated Systems [SiS] 7001 (rev 7).
USB Controller: Silicon Integrated Systems [SiS] 7001 (#2) (rev 7).
PCI bridge: Silicon Integrated Systems [SiS] 5591/5592 AGP (rev 0).
Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 16).
Communication controller: C-Media Electronics Inc CM8738 (rev 16).
VGA compatible controller: Silicon Integrated Systems [SiS] SiS630 GUI Accelerator+3D (rev 32).
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This archive was generated by hypermail 2b29 : Tue Aug 07 2001 - 21:00:40 EST