Re: [patch] voluntary-preempt-2.6.8.1-P9 : a few submillisecond latencies
From: P.O. Gaillard
Date: Mon Aug 30 2004 - 04:53:09 EST
Hello,
here are a few submillisecond latencies.
First, the lspci of the machine (which is different from the one I just posted
about).
http://po.gaillard.free.fr/latency/dell.lspci-v.txt
First, the 3c59x Ethernet card seems to cause 450us latencies :
http://po.gaillard.free.fr/latency/latency_bt.3c59x.txt
http://po.gaillard.free.fr/latency/latency_trace.3c59x.txt
Then the e1000 driver seems to cause 200us latencies :
http://po.gaillard.free.fr/latency/latency_bt.e1000_stats.txt
http://po.gaillard.free.fr/latency/latency_trace.e1000_stats.txt
Since the other machine with an Intel e1000 controller, shows a twice smaller
latency, I post its lpsci entry for the controller (note that latency is twice
smaller) :
02:0a.0 Ethernet controller: Intel Corp. 82541EI Gigabit Ethernet Controller
(Copper)
Subsystem: Intel Corp.: Unknown device 1213
Flags: bus master, 66Mhz, medium devsel, latency 32, IRQ 22
Memory at f2000000 (32-bit, non-prefetchable)
I/O ports at b400 [size=64]
Capabilities: [dc] Power Management version 2
Capabilities: [e4] PCI-X non-bridge device.
and thank you to Ingo for the speedy response to the console issue. I applied
the patch and the kernel is compiling.
P.O. Gaillard
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/