bunanson | # 81 | 2007-09-22, 22:59 | Report

jpg for measured real time for various configurations,

they are,

2007HeFlash, 2007HeMMC, 2007HeMMC with patch, 2006OSFlash, 2006OSMMC, 2006OSMMC w patch. For Mil and Fanoush, the patched columes are colume 3 and colume 6.

All measured in ave of 3 trials under strict same conditions, (I even sit in the same chair to avoid change in distance from router ). There is one exception, the patched 2007He has optimized opera browser, see previous posts in this thread,

[QUOTE_____________________________________________ ______
Other than crashing, you also complaint it is running slow, is only the opera browser or ALL progs? For the opera browser, I have installed those tips,
http://www.internettablettalk.com/fo...ght=opera+tips,

and these too,
http://www.internettablettalk.com/fo...ght=opera+tips
__________________________________________________ _QUOTE]
which by itself results in 25% speed enhancement. The rest of all 5 columes are ALL measured under strict similar conditions. Mplayer loading 500 songs is the most spectacular winner!



bun

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Last edited by bunanson; 2007-09-22 at 23:49.

boblinds | # 82 | 2007-09-23, 06:36 | Report

For those who are experiencing slowdown:

I don't have enough down-and-dirty knowledge of Linux to draw any worthy conclusions, but here's an anecdotal observation for a knowledgeable person to check out.

I installed the latest HE2007 today and observed a performance improvement, UNTIL I created a symbolic link so I could view my Root files in File Manager. Upon doing that, the entire system slowed down noticeably, something akin to what I see described by other users. Got rid of the links and the system returned to reasonable performance again.

For what it's worth...

bunanson | # 83 | 2007-09-23, 11:52 | Report

UNTIL I created a symbolic link so I could view my Root files in File Manager.


could you show me how to do that, I want to check. thanks.


bun

bunanson | # 84 | 2007-09-23, 12:00 | Report

[QUOTE=

In fact since jffs2 is a compressed file system, the internal flash is really slower than mmc card. Kos /QUOTE]
__________________________________________________ ______________

In theory only. In practice, no 'measurable' speed difference in general use,
http://www.internettablettalk.com/fo...ght=mmc+faster,

and the latest post a couple page down.

bun

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Last edited by bunanson; 2007-09-23 at 17:28.

cseals3 | # 85 | 2007-09-23, 14:35 | Report

bun:

Per your previous question, the commands to show / (root) files in the file manager are as follows. (I forget where this came from):

cd ~/MyDocs
ln -s / Root

Regarding your comment on the practical speedup by moving files from internal to mmc, I didn't measure when I did this once, but didn't really notice the increased speed by running the OS from mmc.

Finally, got 2007 HE running without problem. Instead of entire OS, I just flashed the filesystem, keeping the Fanoush kernel intact. Seems to be working well so far. Recommend others who have had problems to try this also.

Carl

bunanson | # 86 | 2007-09-23, 17:47 | Report

Thanks Carl, so the command will have the dir /root show up as a dir and read file from file manager, right? Thanks, sounds like a good idea. Well, if it drags down everything, I think I am goin to take a pass.

Yes. MMC boot does not give much noticable faster in operation. I measured it and posted two times , yes, not only once. In theory, it should speed things up, but in practice, no.

I tried to pass that I understand what you were talking about in the last paragraph, "instead of flashing the whole sys, you just flashed the filesystem", in fact, I dont. You mind to drop a few lines to explain it, and write down the commands how to achieve it, do not forget to put down your starting configuration, OS/flash/MMC 1G or 2G etc. This may be useful when we have to do our ritual, time to time, the Nokia upgrade. I like to write down those step-to-step instructions because I like to help others, that is a plain lie and a plain joke , in fact, it helps me to follow it myself in case I have to do it again a few month down the road, for e.g. I have install, remove, re-install maemo mapper probably 5 times to get it working, so does the pairing of my Treo.

bun

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Last edited by bunanson; 2007-09-23 at 17:49.

Milhouse | # 87 | 2007-09-24, 00:23 | Report

This is a reasonably well known issue with OS 2007 (bug #1760) - it causes the metalayer-crawler service to loop and consume large amounts of CPU. metalayer-crawler is the service that indexes your media files for use with Media Player - it trawls the MMC card and also the directories under MyDocs - your symbolic link causes it recursively walk the filesystem and become stuck in /dev.

Until the bug is fixed in a future update to metalayer-crawler don't create that sym link.

bunanson | # 88 | 2007-09-24, 06:19 | Report

[QUOTE=bunanson;77134]Umm..................I think we have a problem here.

FWIW, I repeat this on 2006OS MMCplus 1G patched,

real 29.77s
user 0.15s
sys 4.14s

real time clock 31.5 s

slight longer than 2007He MMCplus, but not much.... I know they should be similar, and they are, I just want to document it.


bun

boblinds | # 89 | 2007-09-24, 07:17 | Report

Yes, that's exactly what I did:

cd ~/MyDocs
ln -s / Root

And got exactly the behavior that Milhouse describes. Looks like I hit the bug.

Thanks for confirming that my powers of observation and deduction aren't gone completely, guys.

fanoush | # 90 | 2007-09-24, 07:57 | Report

Maybe it would be interesting to measure response time when CPU is busy (like when playing oggs or real media). Access to jffs2 needs CPU for (de)compression so when CPU is busy with something else the difference should be more visible. When CPU is doing nothing performance difference may not be apparent.

Even if you can't measure the gain directly, it helps the system here and there and can help a lot when system is stressed (low memory, high cpu usage). I/O to mmc card is free for CPU, just see the 'sys' line in dd tests. With jffs2 CPU is the bottleneck.

But true that cloning system to MMC just because of possible speed gains is not worth the effort for most people.


Read the very first post in this thread.