Rooting Tab Ultra

[ottischwenk]

Originally Posted by Renate

You forgot a slash.

BOOX:/sdcard/Test $ /data/local/tmp/alpha.sh

with slash

D:\_Reader-Smartphone\ADB>adb shell
BOOX:/ $ cd /sdcard/Test
BOOX:/sdcard/Test $ chmod 755 /data/local/tmp/alpha.sh
BOOX:/sdcard/Test $ /data/local/tmp/alpha.sh
/system/bin/sh: /data/local/tmp/alpha.sh: No such file or directory
1|BOOX:/sdcard/Test $

[ottischwenk]

@Renate: Rexbanner did it with your script

[Renate]

Originally Posted by ottischwenk

@Renate: Rexbanner did it with your script

I know. I did it too. There's is something goofy with your shell.

#!/system/bin/sh

echo Hi, this works for a change.

Get this working first, with the first line, without "/system" or without the first line. Whatever it takes.

[ottischwenk]

Originally Posted by Renate

I know. I did it too. There's is something goofy with your shell.

#!/system/bin/sh

echo Hi, this works for a change.

Get this working first, with the first line, without "/system" or without the first line. Whatever it takes.

Microsoft Windows [Version 10.0.22621.963]
(c) Microsoft Corporation. Alle Rechte vorbehalten.

d:\_Reader-Smartphone\ADB>adb push alpha.sh /data/local/tmp
alpha.sh: 1 file pushed. 0.0 MB/s (173 bytes in 0.047s)

d:\_Reader-Smartphone\ADB>
d:\_Reader-Smartphone\ADB>adb push x.sh /data/local/tmp
x.sh: 1 file pushed. 0.0 MB/s (53 bytes in 0.016s)

d:\_Reader-Smartphone\ADB>adb shell
BOOX:/ $ chmod 755 /data/local/tmp/x.sh
BOOX:/ $ /data/local/tmp/x.sh
/system/bin/sh: /data/local/tmp/x.sh: No such file or directory
1|BOOX:/ $ cd /data/local/tmp
BOOX:/data/local/tmp $ ls
alpha.sh  x.sh
BOOX:/data/local/tmp $ exit

d:\_Reader-Smartphone\ADB>adb push x.sh /data/local/tmp
x.sh: 1 file pushed. 0.0 MB/s (46 bytes in 0.016s)

d:\_Reader-Smartphone\ADB>adb shell
BOOX:/ $ chmod 755 /data/local/tmp/x.sh
BOOX:/ $ /data/local/tmp/x.sh
/system/bin/sh: /data/local/tmp/x.sh: No such file or directory
1|BOOX:/ $ exit

d:\_Reader-Smartphone\ADB>adb push x.sh /data/local/tmp
x.sh: 1 file pushed. 0.0 MB/s (37 bytes in 0.010s)

d:\_Reader-Smartphone\ADB>adb shell
BOOX:/ $ chmod 755 /data/local/tmp/x.sh
BOOX:/ $ /data/local/tmp/x.sh
: inaccessible or not found
: inaccessible or not found
Hi, this works for a change.
BOOX:/ $

x.sh

.
.
echo Hi, this works for a change.

2 empty lines before echo!

[ottischwenk]

alpha.sh

for a in a b c d e f g h i j k l m n o p q r s t u v w x y z; do
i=0; while [ $((i)) -lt 1000 ]; do touch $a$i; i=$(($i+1)); done
time ls -l | wc
done

d:\_Reader-Smartphone\ADB>adb shell
BOOX:/ $ cd /sdcard/Test
BOOX:/sdcard/Test $ chmod 755 /data/local/tmp/alpha.sh
BOOX:/sdcard/Test $ /data/local/tmp/alpha.sh
'data/local/tmp/alpha.sh[1]: syntax error: unexpected 'do
1|BOOX:/sdcard/Test $

[Renate]

Oh, wait a minute!
How are you copying/pasting the scripts?
Are you using "Windows Notepad"?
Don't!

Install Notepad++ which correctly deals with "Unix style" (uses LF instead of CR/LF line endings).
You can also use "Unix style" on any text file for Windows too.
"Unix style" should be your choice always.

Load your script in Notepad++. It will say either "DOS" or "Unix" in the bottom status bar.

https://notepad-plus-plus.org/downloads/

And/or:

$ dos2unix /data/local/tmp/alpha.sh

And you have to give credit to *nix for being so bloody-minded.
It could just say, "Oh, jeez, another ^M coming before ^J again. I guess that I'll ignore it."

In Windows, under Settings > Apps > Apps & Features > Optional Features > Notepad > Uninstall!

[ottischwenk]

Wow, thank you - now it works.
Im using Notepad++, but it was set to Windows (CR LF).

My Unix time ended 20 years ago and I've forgotten a lot of it.

[ottischwenk]

Hmm, but creating an measuring of time direct after creation isnt the problem.
The problem is the 2nd time after reboot.

In my opinion, the time should increase linearly with the number of files - but it increases somewhat progressively.
Examples:
Between 3001 and 4001 it's 7.02 seconds
Between 8001 and 9001 it is 16 seconds
Between 16001 and 17001 it is 26.42 seconds

And now:

BOOX:/sdcard/Test $ /data/local/tmp/alpha.sh
   1001    8002   51898
    0m02.49s real     0m00.12s user     0m00.44s system
   2001   16002  103788
    0m06.91s real     0m00.26s user     0m01.01s system
   3001   24002  155678
    0m12.56s real     0m00.30s user     0m01.63s system
   4001   32002  207568
    0m19.58s real     0m00.34s user     0m02.11s system
   5001   40002  259458
    0m31.13s real     0m00.66s user     0m02.69s system
   6001   48002  311348
    0m42.56s real     0m00.81s user     0m03.37s system
   7001   56002  363238
    0m55.63s real     0m00.89s user     0m04.07s system
   8001   64002  415128
    1m07.81s real     0m00.95s user     0m04.49s system
   9001   72002  467018
    1m23.22s real     0m00.75s user     0m05.44s system
  10001   80002  518908
    1m39.22s real     0m01.19s user     0m05.62s system
  11001   88002  570798
    1m56.02s real     0m00.87s user     0m06.65s system
  12001   96002  622688
    2m14.95s real     0m01.14s user     0m07.32s system
  13001  104002  674578
    2m34.26s real     0m00.93s user     0m08.07s system
  14001  112002  726468
    2m52.12s real     0m01.47s user     0m07.93s system
  15001  120002  778358
    3m14.64s real     0m01.55s user     0m08.60s system
  16001  128002  830248
    3m33.10s real     0m01.56s user     0m09.06s system
  17001  136002  882138
    3m59.52s real     0m01.72s user     0m09.91s system
  18001  144002  934028
    4m22.69s real     0m01.40s user     0m10.50s system
  19001  152002  985918
    4m48.05s real     0m01.93s user     0m11.02s system
  20001  160002 1037808
    5m12.97s real     0m01.81s user     0m11.67s system
  21001  168002 1089698
    5m38.56s real     0m01.61s user     0m12.55s system
  22001  176002 1141588
    6m02.03s real     0m01.97s user     0m12.48s system
  23001  184002 1193478
    6m32.44s real     0m01.69s user     0m13.61s system
  24001  192002 1245368
    7m02.78s real     0m02.35s user     0m13.66s system
  25001  200002 1297258
    7m31.83s real     0m02.10s user     0m14.74s system
  26001  208002 1349148
    8m02.08s real     0m02.25s user     0m15.13s system

With 26000 files, the Poke3 is 610 times as fast

[Renate]

Well, the problem with any of that user mode file systems is that it puts a big road block in all the disk operations. The Poke3 doesn't manage to totally kill it, but something is definitely wrong with the Ultra Tab and the Leaf2 implementations.

12 seconds for listing 3000 files is ridiculous. 3000 files in one directory is not all that excessive.

In ext4 (I just learned this), the filename is hashed and looked up in a tree structure (HTree). A file can be quickly located. OTOH, if you say that you are looking for a file with a name *similar* to "ObNoXiOuS" it could be anywhere and you have to check every single filename to see if it's *similar*. So if the directory is twice as big, you have twice the number of candidates to check but also twice as many things to find so it's four times slower.

Still, we're only seeing a power of 1.65 and not 2.0

[rexbanner]

I am not entirely sure, but if understand this discussion on reddit correctly, this problem is not specific to onyx boox:
https://www.reddit.com/r/androiddev/...s_performance/

[ottischwenk]

Originally Posted by Renate

Still, we're only seeing a power of 1.65 and not 2.0

I've now run this test on the Leaf2 - it takes about 1 second longer per 1000 files; so pretty linear.
And that with much weaker hardware

[Renate]

18 seconds is still worse than 0.6 seconds.

Also, even though factoring big directories helps.
C/Clarke/Arthur C. Clarke/Fiction/2001: A Space Odyssey requires five separate searches as each directory has to be searched indpendently.

Also, even when you select that book from a device enumerated (and exactly correct) path the system still has to search for all the case-variant files.

[ottischwenk]

Originally Posted by Renate

18 seconds is still worse than 0.6 seconds.

Yes it is but a different OS 11 vs 10 and much weaker hardware.
I'm on the new Tab Ultra test now and will post your screenshot here when it's done

[Renate]

Originally Posted by ottischwenk

...will post your screenshot here when it's done

Please post it as plain text, not as a graphic.

So, I'm confused. Please summarize your findings.
Isn't the 8 minutes the Tab Ultra? Are you doing a second test on the Tab Ultra?

[ottischwenk]

Originally Posted by Renate

Please post it as plain text, not as a graphic.

So, I'm confused. Please summarize your findings.
Isn't the 8 minutes the Tab Ultra? Are you doing a second test on the Tab Ultra?

I did a second test on the Tab Ultra - the times are generally a bit slower (8m11.88 real)

Unfortunately I only saved it as a graphic - documentation for Boox, also the Leaf 2 values for comparison.

And here the values of Leaf1 - they correspond to those of Poke 3 (Android 10)

d:\_Reader-Smartphone\ADB>adb shell
Leaf:/ $ cd /sdcard
Leaf:/sdcard $ mkdir Test
Leaf:/sdcard $ cd Test
Leaf:/sdcard/Test $ chmod 755 /data/local/tmp/alpha.sh
Leaf:/sdcard/Test $ /data/local/tmp/alpha.sh
   1001    8002   51898
    0m00.04s real     0m00.04s user     0m00.02s system
   2001   16002  103788
    0m00.06s real     0m00.07s user     0m00.02s system
   3001   24002  155678
    0m00.09s real     0m00.07s user     0m00.06s system
   4001   32002  207568
    0m00.13s real     0m00.07s user     0m00.10s system
   5001   40002  259458
    0m00.15s real     0m00.09s user     0m00.11s system
   6001   48002  311348
    0m00.18s real     0m00.02s user     0m00.21s system
   7001   56002  363238
    0m00.26s real     0m00.14s user     0m00.15s system
   8001   64002  415128
    0m00.24s real     0m00.13s user     0m00.18s system
   9001   72002  467018
    0m00.28s real     0m00.17s user     0m00.17s system
  10001   80002  518908
    0m00.29s real     0m00.14s user     0m00.25s system
  11001   88002  570798
    0m00.32s real     0m00.15s user     0m00.28s system
  12001   96002  622688
    0m00.38s real     0m00.22s user     0m00.25s system
  13001  104002  674578
    0m00.38s real     0m00.21s user     0m00.29s system
  14001  112002  726468
    0m00.50s real     0m00.14s user     0m00.45s system
  15001  120002  778358
    0m00.42s real     0m00.22s user     0m00.31s system
  16001  128002  830248
    0m00.48s real     0m00.29s user     0m00.34s system
  17001  136002  882138
    0m00.50s real     0m00.29s user     0m00.37s system
  18001  144002  934028
    0m00.52s real     0m00.21s user     0m00.48s system
  19001  152002  985918
    0m00.59s real     0m00.27s user     0m00.44s system
  20001  160002 1037808
    0m00.76s real     0m00.35s user     0m00.49s system
  21001  168002 1089698
    0m00.61s real     0m00.32s user     0m00.50s system
  22001  176002 1141588
    0m00.64s real     0m00.25s user     0m00.60s system
  23001  184002 1193478
    0m00.65s real     0m00.28s user     0m00.55s system
  24001  192002 1245368
    0m00.69s real     0m00.34s user     0m00.58s system
  25001  200002 1297258
    0m00.73s real     0m00.34s user     0m00.62s system
  26001  208002 1349148
    0m00.76s real     0m00.40s user     0m00.62s system
Leaf:/sdcard/Test $