Bug 23302 – MBX: dhrystone performance

Bug 23302 - MBX: dhrystone performance

Summary:	MBX: dhrystone performance

Status:	CLOSED CURRENTRELEASE

Aliases:	None

Product:	eCos
Classification:	Retired
Component:	HAL (Show other bugs)
Sub Component:
Version:	CVS
Hardware:	i386 Linux

Priority	medium Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	ecc-bugs-int
QA Contact:	ecc-bugs-int
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Blocks:
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Reported:	2001-01-04 09:21 EST by Jesper Skov
Modified:	2007-04-18 12:30 EDT (History)
CC List:	0 users

See Also:
Fixed In Version:
Doc Type:	Bug Fix
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Last Closed:	2002-01-24 07:31:31 EST
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Description Jesper Skov 2001-01-04 09:21:38 EST

Way back when, I ran dhrystone tests on both eCos and Linux on the 
same MBX board. The  version on Linux ran quite a bit faster. Possibly
missing some board initialization magic in the HAL.

Comment 1 George Thomas 2002-01-24 07:31:25 EST

I just noticed that the performance of the MBX board when running from RAM is
less than 50% of what it is when run from ROM.  This is most likely a RAM vs.
ROM hardware configuration problem (the RAM is DRAM which runs via a complicated
setup).  Fix this anomaly and you'll probably fix the Dhrystone performance
problem as well.

Comment 2 George Thomas 2002-04-11 13:23:44 EDT

The caches were not being set up properly, certainly not for RAM based
applications.  This has been fixed and the Dhrystone benchmark now runs more
than 4 times faster than before.

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