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sluggish performance on ultrasparc 10, kernel 2.6
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sobers_2002
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PostPosted: Sun Jun 18, 2006 8:01 pm    Post subject: sluggish performance on ultrasparc 10, kernel 2.6 Reply with quote

HI,

I am using gentoo on my ultrasparc. It was working okay-ish with kernel 2.4 (it's an old system after all! ). I installed kernel 2.6 and now the 2.4 kernel doesn't boot due to some file system error, so using it is not currently an option.

After I installed 2.6, the performance has been pretty sluggish in terms of the response of the system. Also, emerge --metadata takes like forever now. The hard disk performance still gives the same results approximately.
Code:
hdparm -tT /dev/hda

/dev/hda:
 Timing O_DIRECT cached reads:   740 MB in  2.01 seconds = 368.87 MB/sec
 Timing O_DIRECT disk reads:   38 MB in  3.09 seconds =  12.29 MB/sec


The kernel config is available here. The system is as follows

cpuinfo
Code:
cpu             : TI UltraSparc IIi (Sabre)
fpu             : UltraSparc IIi integrated FPU
promlib         : Version 3 Revision 29
prom            : 3.29.0
type            : sun4u
ncpus probed    : 1
ncpus active    : 1
D$ parity tl1   : 0
I$ parity tl1   : 0
Cpu0Bogo        : 876.54
Cpu0ClkTck      : 000000001a39de00
MMU Type        : Spitfire


lspci
Code:
0000:00:00.0 Host bridge: Sun Microsystems Computer Corp. Ultra IIi
0000:00:01.0 PCI bridge: Sun Microsystems Computer Corp. Simba Advanced PCI Bridge (rev 13)
0000:00:01.1 PCI bridge: Sun Microsystems Computer Corp. Simba Advanced PCI Bridge (rev 13)
0000:01:01.0 Bridge: Sun Microsystems Computer Corp. EBUS (rev 01)
0000:01:01.1 Ethernet controller: Sun Microsystems Computer Corp. Happy Meal (rev 01)
0000:01:02.0 VGA compatible controller: ATI Technologies Inc 3D Rage Pro 215GP (rev 5c)
0000:01:03.0 IDE interface: Silicon Image, Inc. PCI0646 (rev 03)


please guide me.

thanks
Saurabh
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sobers_2002
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PostPosted: Mon Jun 19, 2006 2:01 pm    Post subject: Reply with quote

nothing?
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Weeve
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PostPosted: Mon Jun 19, 2006 4:30 pm    Post subject: Reply with quote

Most people from what I have seen reported having experienced the opposite. You might make sure that you don't have pre-emptive kernel support enabled as it was last reported to not work so well and in some cases cause problems.

Which 2.6 kernel are you using?
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sobers_2002
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PostPosted: Mon Jun 19, 2006 7:28 pm    Post subject: Reply with quote

I had pre-emt enabled, I disabled it, but there hasn't been much improvement, a slight lagging is still there.

kernel version is 2.6.16-gentoo-r9.
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