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Porting apps to Leste (29)
to Maemo 7 / Leste by Arno_11 - 3 days ago -
Install Fonts in N900 (68)
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2011-04-01
, 12:15
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Posts: 103 |
Thanked: 36 times |
Joined on Apr 2010
@ United Kingdom, Huddersfield
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#122
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Just thought id add my 2 cents, even though this post is a little old...
I have just done a full backup of my rootfs using tar to my MMC and the phone stayed respsonsive for the whole process, before it would kill it.
I'm using the settings from page 1
I have just done a full backup of my rootfs using tar to my MMC and the phone stayed respsonsive for the whole process, before it would kill it.
I'm using the settings from page 1
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Kernel panic: Not Syncing
My N900 = CSSU-Thumb, kernel-power-52 @ 1000MHZ
Kernel panic: Not Syncing
My N900 = CSSU-Thumb, kernel-power-52 @ 1000MHZ
| The Following User Says Thank You to AliasXZ For This Useful Post: | ||
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2011-04-01
, 15:04
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Posts: 1,522 |
Thanked: 392 times |
Joined on Jul 2010
@ São Paulo, Brazil
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#123
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I must be doing somthing wrong, haven't noticed any improvements in the performance, much less a massive one 
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NOKIA N900: IT'S OVER NINE THOUSAND
How to use HotspotShield in the N900
Google Voice from outside the US + Free international calls: LEARN HOW HERE!!!
NOKIA N900: IT'S OVER NINE THOUSAND
How to use HotspotShield in the N900
Google Voice from outside the US + Free international calls: LEARN HOW HERE!!!
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2011-04-23
, 16:36
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Moderator |
Posts: 7,109 |
Thanked: 8,820 times |
Joined on Oct 2007
@ Vancouver, BC, Canada
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#124
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Originally Posted by freemangordon
I'm wondering if there is any way to disable swap on a specific process or partition? I would like to disable swapping during the file extraction phase, just on the lzma extraction process.
The last thing to do was to play with swap - bingo, at the moment I swapoff EMMC swap, extracting speed raise to about 10 MB/s with no lagging at all. And the strange thing is that performance raise at the moment I did swapoff, even before swap was transferred to sdcard swap partition. Swap priorities do not matter - as long as EMMC swap is turned on, performance degrades severely.
Another option would be to use the same trick they used on the old Maemo tablets; make a swap file on the SD card and make that the temporary swap during the extraction. That way, the user doesn't need to know how to repartition the SD card, and the N900 doesn't bog down and possibly reboot...
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Please don't send me a private message, post to the appropriate thread.
Thank you all for your donations!
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2011-04-23
, 17:22
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Posts: 804 |
Thanked: 1,598 times |
Joined on Feb 2010
@ Gdynia, Poland
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#125
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Originally Posted by qole
I don't know if it can help you, but by reading file "/proc/iomem" you can see what addresses of memory are mapped to which devices (I understand it like that (source) and it makes sense, because two last options, both named "System RAM" make 256 MB alltogether). In process (although it would look horribly ugly) you could allocate all space with malloc() (if you use C or C++) and check if returned pointer address is inside this area. But I have no idea if it would work properly and how to force system to alloc a memory from this area... Just wanted to point it. Your Linux and programming skills are much greater than mine (I suppose), maybe you even knew what I wrote, but even if this idea is stupid, could you explain why it can or cannot be done (if you know)? Thanks in advance.
I'm wondering if there is any way to disable swap on a specific process or partition? I would like to disable swapping during the file extraction phase, just on the lzma extraction process.
PS. Simple code example of my idea how to check memory addres:
Code:
int *ptr = malloc(100);
if((int)(ptr)>=0x80000000 && (int)(ptr)<=0x8fffffff)
printf("Yay! Address %x is in physical RAM :)\n", (int)(ptr));
else
printf("Boo! Addres %x is not in physical RAM :(\n", (int)(ptr));
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2011-04-23
, 17:28
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Posts: 2,355 |
Thanked: 5,249 times |
Joined on Jan 2009
@ Barcelona
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#126
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Originally Posted by qole
Have a look at the madvise man page.
I'm wondering if there is any way to disable swap on a specific process or partition? I would like to disable swapping during the file extraction phase, just on the lzma extraction process.
However, considering that you mentioned lzma, I believe that what you'd like is for it not to cache any files it access so that other cached files or processes' pages are not evicted from memory; in which case, I suggest you look at the fadvise man page.
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2011-04-23
, 20:41
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Moderator |
Posts: 7,109 |
Thanked: 8,820 times |
Joined on Oct 2007
@ Vancouver, BC, Canada
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#127
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I was hoping for something from the command line...
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qole.org --- twitter --- Easy Debian wiki page
Please don't send me a private message, post to the appropriate thread.
Thank you all for your donations!
qole.org --- twitter --- Easy Debian wiki page
Please don't send me a private message, post to the appropriate thread.
Thank you all for your donations!
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2011-04-23
, 21:05
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Posts: 804 |
Thanked: 1,598 times |
Joined on Feb 2010
@ Gdynia, Poland
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#128
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Originally Posted by qole
I thought so... :P
I was hoping for something from the command line...
Why not just:
Code:
# read current values VAL01=`cat /proc/sys/vm/dirty_ratio` VAL02=`cat /proc/sys/vm/dirty_background_ratio` VAL03=`cat /proc/sys/vm/dirty_writeback_centisecs` VAL04=`cat /proc/sys/vm/dirty_expire_centisecs` VAL05=`cat /proc/sys/vm/min_free_kbytes` VAL06=`cat /proc/sys/vm/swappiness` VAL07=`cat /proc/sys/vm/vfs_cache_pressure` VAL08=`cat /proc/sys/vm/page-cluster` VAL09=`cat /sys/block/mmcblk0/queue/nr_requests` VAL10=`cat /sys/block/mmcblk1/queue/nr_requests` # use vaules from page 1 of this tread echo 3 > /proc/sys/vm/dirty_ratio echo 3 > /proc/sys/vm/dirty_background_ratio echo 100 > /proc/sys/vm/dirty_writeback_centisecs echo 100 > /proc/sys/vm/dirty_expire_centisecs echo 4096 > /proc/sys/vm/min_free_kbytes echo 50 > /proc/sys/vm/swappiness echo 200 > /proc/sys/vm/vfs_cache_pressure echo 8 > /proc/sys/vm/page-cluster echo 4 > /sys/block/mmcblk0/queue/nr_requests echo 4 > /sys/block/mmcblk1/queue/nr_requests # #DO SOME STUFF HERE, EG. RUN YOUR PROCESS # # set previous values echo $VAL01 > /proc/sys/vm/dirty_ratio echo $VAL02 > /proc/sys/vm/dirty_background_ratio echo $VAL03 > /proc/sys/vm/dirty_writeback_centisecs echo $VAL04 > /proc/sys/vm/dirty_expire_centisecs echo $VAL05 > /proc/sys/vm/min_free_kbytes echo $VAL06 > /proc/sys/vm/swappiness echo $VAL07 > /proc/sys/vm/vfs_cache_pressure echo $VAL08 > /proc/sys/vm/page-cluster echo $VAL09 > /sys/block/mmcblk0/queue/nr_requests echo $VAL10 > /sys/block/mmcblk1/queue/nr_requests
EDIT: After reading more posts from this thread, maybe using values from first post isn't BEST option... but there are other settings posted ITT, so you can pick some other ones
Last edited by misiak; 2011-04-23 at 21:09.
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2011-04-23
, 21:12
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Posts: 804 |
Thanked: 1,598 times |
Joined on Feb 2010
@ Gdynia, Poland
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#129
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Originally Posted by freemangordon
Could that possibly be used also in new nicolai's camera-ui, so recorded videos won't lag (the lag somtimes because of slow i/o operations)?
They last thing to do was to play with swap - bingo, at the moment I swapoff EMMC swap, extracting speed raise to about 10 MB/s with no lagging at all. And the strange thing is that performance raise at the moment I did swapoff, even before swap was transferred to sdcard swap partition. Swap priorities do not matter - as long as EMMC swap is turned on, performance degrades severely.
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2011-04-24
, 01:03
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Moderator |
Posts: 7,109 |
Thanked: 8,820 times |
Joined on Oct 2007
@ Vancouver, BC, Canada
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#130
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I tried making a swap file on the SD card, so I could get the benefit of an external swap file without the complexity of repartitioning the card.
Sadly, I ran across this bug: https://bugs.maemo.org/show_bug.cgi?id=7165
Maybe if it were fixed in Titan's power kernel, I could do it... but then that defeats my purpose of trying to find a way to get this working for people who don't want to futz with custom kernels etc.
Sadly, I ran across this bug: https://bugs.maemo.org/show_bug.cgi?id=7165
Maybe if it were fixed in Titan's power kernel, I could do it... but then that defeats my purpose of trying to find a way to get this working for people who don't want to futz with custom kernels etc.
__________________
qole.org --- twitter --- Easy Debian wiki page
Please don't send me a private message, post to the appropriate thread.
Thank you all for your donations!
qole.org --- twitter --- Easy Debian wiki page
Please don't send me a private message, post to the appropriate thread.
Thank you all for your donations!
My Nokia N900 is my website, still up an running for the Maemo community. My Nokia N900 is upgraded to 21.2011.38-1Tmaemo1.1 ~ CSSU ready ~ Overclocked ~ Speed patched ~ Swappolube ~ was running 7 desktops ~ 270 apps and counting ~ Multi-Boot with Standard Kernel , Kernel Power 2.6.28.10power47 and NITDroid N12 "UMay".