Low power CPU (Intel Atom) to control RAID1 array (mdadm) [solved]

Can anyone comment on the CPU overhead associated with using a low power CPU such as an Intel Atom to function as a NAS running software raid1 (mdadm)? Will it limit I/O?
Last edited by graysky (2013-10-02 07:32:08)

Logic says raid0/raid1 should not be much of a problem since you are splitting/dupplicating data without doing any or almost any math, raid5 or others that need to calculate parity information can be a problem with atom cpus I believe.
Maybe you should check review sites for NAS boxes reviews, most come with atom cpus inside and will probably give you a good idea of how your specific cpu model will perform.

Similar Messages

Cannot remove raid1 array (mdadm)

Hi,
The system is Oracle Linux 6.3 x86_64 running under VirtualBox. In order to remove the Linux RAID root volume I have started the system using the OL 6.3 UEK boot CD.
For some reason I'm unable to remove the /dev/md127 RAID device. Please see below:
<pre>
# mdadm -As
mdadm: /dev/md/vm009.example.com:1 has been started with 2 drives.
# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] [linear]
md127 : active raid1 sda2 [0] sdb2 [1]
20457404 blocks super 1.1 [2/2] [UU]
bitmap: 0/1 pages [0KB], 65536KB chunk
md126 : active raid1 sda1[0] sdb1[1]
511988 blocks super 1.0 [2/2] [UU]
</pre>
My first idea was to stop the device and remove it, which does not work:
<pre>
# *mdadm --stop /dev/md127*
mdadm: stopped /dev/md127
# *mdadm --remove /dev/md127*
mdadm: error opening /dev/md127: No such file or directory
</pre>
However, there is no error when I do not stop /dev/md127. But also the device is not removed:
<pre>
# mdadm -As
mdadm: /dev/md/vm009.example.com:1 has been started with 2 drives.
# *mdadm --remove /dev/md127*
# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] [linear]
md127 : active raid1 sda2 [0] sdb2 [1]
20457404 blocks super 1.1 [2/2] [UU]
bitmap: 0/1 pages [0KB], 65536KB chunk
md126 : active raid1 sda1[0] sdb1[1]
511988 blocks super 1.0 [2/2] [UU]
</pre>
I thought about to use -zero-superblock:
<pre>
# *mdadm --stop /dev/md127*
mdadm: stopped /dev/md127
# *mdadm --zero-superblock /dev/sdb2*
# mdadm -As
mdadm: /dev/md/vm009.example.com:1 has been started with 1 drive (out of 2).
# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] [linear]
md127 : active raid1 sda2 [0]
20457404 blocks super 1.1 [2/1] [U_]
bitmap: 0/1 pages [0KB], 65536KB chunk
md126 : active raid1 sda1[0] sdb1[1]
511988 blocks super 1.0 [2/2] [UU]
</pre>
However, if I do the same for the other drive, then I loose the complete enchilada.
<pre>
# *mdadm --stop /dev/md127*
mdadm: stopped /dev/md127
# *mdadm --zero-superblock /dev/sda2*
# mdadm -As
mdadm: No arrays found in config file or automatically
</pre>
Here is the detail of the /dev/md127 device:
<pre>
# mdadm --detail /dev/md127
/dev/md127:
Version : 1.1
Creation Time : Wed Nov 7 01:44:42 2012
Raid Level : raid1
Array Size : 20457404 (19.51 GiB 20.95 GB)
Used Dev Size : 20457404 (19.51 GiB 20.95 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Thu Nov 8 01:23:00 2012
State : active
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : vm009.example.com:1
UUID : 006a3ad6:c0590b94:5fddf632:5704f209
Events : 70
Number Major Minor RaidDevice State
0 8 2 0 active sync /dev/sda2
1 8 18 1 active sync /dev/sdb2
</pre>
Any ideas what I might be doing wrong? Thanks!

I found confirmation of the procedure to remove a RAID device in chapter 5.3.5. Removing a RAID Device at https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Deployment_Guide/s2-raid-manage-removing.html. But apparently, there is no more reference in the documentation for version 6.
Anway, after some experimenting I finally I seem to have found the solution:
<pre>
# mdadm -S /dev/md126
mdadm: stopped /dev/md126
# mdadm -S /dev/md127
mdadm: stopped /dev/md127
mdadm --zero-superblock /dev/sdb2
mdadm --zero-superblock /dev/sda2
# mdadm -As
mdadm: /dev/md/vm009.example.com:0 has been started with 2 drives.
# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] [linear]
md127 : active raid1 sda1[0] sdb1[1]
511988 blocks super 1.0 [2/2] [UU]
</pre>
Apparently the trick is to stop all of the RAID devices and not just only the one to be deleted (md127). Something might get confused between md126 and md127. I have no explanation. I guess I do not need to remove the md127 RAID device once the RAID superblock is removed, but I wonder how this will work with initramfs, which should still have references to the RAID device.

Green Power CPU Phase Control + C-STATE + Turbo Boost ?

Does anyone know if we can turn on MSI's Green Power CPU Phase Control + Intel C-STATE + Intel Turbo Boost in BIOS all at the same time? Any problems with doing this? Does MSI's Green Power CPU Phase Control override or conflict with Intel's C-STATE? And will Turbo Boost kick in if turned on when a core needs it even if Green Power CPU Phase Control and C-STATE are switched on?
I really like the idea of the PC running cool and quiet when doing lite work, but would like full power on demand as well.
Thanks.

I'm using Intel speedstep (EIST) but i disabled c-state because this brings a unstable PC for me.
I'm using also the greenpower genie and it works very well.
When i don't need the power my PC falls back to 50% 2154MHz (this you can choose in the energy configuration of windows), when i play games or decode movies it goes up to 100% 4130MHz. And it is stable as a rock tested 24/7 prime 95 and OCCT and Intel burn test.
My settings are=
Eist enabled
Turbo enabled
C-state disabled
Greenpower auto
My CPU temp in idle is 24° cores 38° and this on aire (room temp 21°-22°) Load 100%=CPU 60 and cores 70°-72° ( prime stressing), gaming CPU 42°-45°.
For more info on my sys. follow link and see my overclock and voltage settings.http://www.hardware.info/nl-NL/usersys/cm9xZ51mk2yd/view/
I also changed cpu skew and ioh skew to 200ps so i don't get BSOD that says :cpu did not receive clock on time , but this is only necessary when i go above 178 MHz BCKL.

Install any mac os on intel Atom CPU

Hi All,
Can i install any MAC OS on Intel Atom cpu N270 1.60 ghz( 2cpus) 1 Gb RAM???

anandrkumar wrote:
Can i install any MAC OS on Intel Atom cpu N270 1.60 ghz( 2cpus) 1 Gb RAM???
No, even if you could the CPU isn't strong enough.
However you can install the DVD version of Linux Mint 10.10 (not 11 or 12) then theme it to MacBuntu 10.10 (follow the links in the quote instructions below) and it will look like OS X, plus it's a lighter OS version and runs well on netbooks. I have one myself as Apple doesn't make a netbook.
Don't do this on your only machine, you need a way to get online and ask at Linux Mint for assistance.
http://www.linuxmint.com/index.php
MacBuntu 10.10 video
https://www.youtube.com/watch?v=FxODltR8IZY
Note you will not be able to run Windows programs (perhaps a few with Wine) or OS X programs in Linux. But there is lots of free software in the Software Manager and Linux Mint 10.10 (DVD version) installs a lot of useful stuff free, like LibreOffice, software to manage music, Firefox, mail etc etc.
Netbooks are not that powerful anyway, so Linux makes a excellent choice over Windows.
Again 10.10 is the best you can likley do on your hardware.
Enjoy.
ds store's: Easiest, trouble free way to install Linux I have found yet.
These instructions are for a complete wipe of a boot drive and install of Linux, not a "dual boot" / "partition alongside" Windows which is a more risky and involved affair.
Once you do this, unless you have a FULL Windows install disk and valid product key, your PC Vendor version of Windows, it's factory recovery partition, your files and programs, will be totally removed and unrecoverable.
This will NOT work for Mac's as they use EFI and no BIO's, only generic PC's with BIO's can this work.
Linux overwrites the entire drive with a new EXT drive format, recovery of data is not possible. If you do this to a machine that doesn't belong to you, you will likely be facing serious charges of the destruction of private property.
1: Download PenDrive Linux, USB Easy Installer (Windows), stick in a empty (or soon to be empty) 2-4GB USB drive.
http://www.pendrivelinux.com/universal-usb-installer-easy-as-1-2-3/
2: From the first menu you see there, pick a distro (my advice for your first Linux, is Linux Mint 10.10)
If you want to look like OS X then pick MacBuntu, if Like XP, then "Like XP 10.10"
All three of these ARE based upon Ubuntu, but much, much better.
3: Check the box to download the distro, go get a beer and have a sandwich.
4: Browse to the finished download, Set the correct drive letter for the USB. Format the drive. Leave rest alone. Create.
Stick the USB in the target computer, for towers you need to use the BACK USB port.
Hook up a Ethernet cable to your router or modem to download wifi and other drivers, important!
Now you need to find your BIO's boot key on this page.
http://pcsupport.about.com/od/fixtheproblem/a/biosaccess_pc.htm
5: Enter the BIO's and set the USB as the first boot and save. Reboot off the USB key.
6: Your in the installer, choose to erase the whole disk and install Linux. Make sure you have a wired internet connection for drivers/updates. (Linux formats the entire drive, all data will be lost)
That's it, it's very, very easy. Your machine should be fast too.
Get sick of one distro, there are others. You can even turn Linux Mint into MacBuntu at this link
http://community.linuxmint.com/tutorial/view/326
I would go this route if your interested in the OS X look, because Linux Mint is the best desktop for newbies. Everything is there, then you take that with you with the OS X theme switch.
Also if you have a powerful machine, you can install VirtualBox and run a distro in that as well, like Ubuntu.
Good Luck
Asker's Comment:
You have helped me out TREMENDOUSLY! i could never thank you enough! so i give u 10 points! i'd give 20 if i could! Thank you soooo much! i got it up and running thanks to you!

[Review] Intel Atom 330 / Nvidia Ion based Media Center

I thought some of you may be interested. I've just bought a Point of View Mobii ION Mini PC to build a media center.
There are other Nvidia ION based Mini PCs available, but there are few points that made my choice for the Point of View one:
- Intel Atom 330 (Dual Core)
- Mini ITX
- 2 GB RAM
- 320 GB HDD
- 1 Available PCI-Express Slot (hopefully a good DVB-S(2) TV Card with CI will be available soon)
- SPDIF / Toslink Digital Audio Out
- 8 USB Ports (6 Back, 2 Front)
- HDMI Out (Thought that this would be important, but more on this later), DVI, VGA
- No CPU or Motherboard Fan
Additionally I bought a Keysonic ACK-540BT Bluetooth Keyboard with an integrated touchpad. I added 1 GB DDR2 RAM to the PC for a total of 3 GB.
Arch Linux worked straight out of the box, but there are a few things to note:
- The Intel Atom 330 does NOT support Intel Speedstep, therefore no frequency scaling is possible
- I don't want a login manager, just a straight lxde Desktop with an autostarting XBMC, but Blueman (needed for autopairing with the bluetooth keyboard) needed a ck-launch-session to get access to the bluetooth dongle (took me a while to find this out)
- XBMC supports VDPAU out of the box if you configure it, CPU usage when playing a movie is below 20%
- I disconnected the hdd and power LED because they are quite bright (the cabinet I use for my equipment has a glass door)
- The Mini PC is not hearable from 0.5 meters even when hdd is working
- HDMI Output works flawless but my SONY LCD TV is not a Full HD one but has a native resolution of 1360x768. With HDMI I could only choose between 720p (1280x720) which is too small or 1080i (1920x1080) which would be too large. I now use a standard VGA DSUB cable and get a perfectly sharp 1360x768 resolution. No need for HDMI
Just if anyone is interested:
- glxgears: ~2400 fps
hdparm -Tt /dev/sda
/dev/sda:
Timing cached reads: 1304 MB in 2.00 seconds = 651.94 MB/sec
Timing buffered disk reads: 358 MB in 3.00 seconds = 119.22 MB/sec
This is the perfect media center solution for me, capable of managing more than 15.000 mp3 and m4a, a bunch of divx videos and dvd isos, 10.000 photos and hundreds of shoutcast internet radio stations. All managable with a wireless keyboard and touchpad on my Sony LCD TV. Just the tv card is missing...
Last edited by freigeist (2009-08-14 19:39:23)

i am also working on my zotac-9300 itx. i also have the problem of get the right resolution. my tv was bought three years ago and i attached a hdmi cable to it in case some day (such as today) i will use it. however, the zotac hdmi does not work with the tv. either the tv does not detect the signal or the motherboard does not send the signal out. anyway, i use a dvi->hdmi adapter now. but the resolution is still not right. (will fix it later). the 9300 works great on h264, but somehow has trouble with the HD tv signal. although the cpu usage is low when playing those HD channels, but the frames are not smooth. i am using kaffeine to work tv. i am trying to get the vlc to work with vdpau (or vaapi) but has no luck. anyway, good to share our experience on htpc.
ps. my board is using a internal power supply which give me some noise when the room is quiet, but it is ok when watching moives.

Win10 defeating my system's low power modes

Both of these devices ran properly in their low-power modes under 8.1x64:
1) Radeon HD 7850 2GB--For some reason after a boot up, 10-20 minutes later, my GPU jumps from its low-power clocks of 300Mhz/150MHz (core/ram) to full power, and shows 92% GPU activity and appears "stuck" there. Removing all of the Win10
updates did not alleviate the problem as I was hoping for. This is the case regardless of AMD gpu driver used. But it gets better...
2) Not only is my GPU stuck on full throttle mode (even when doing nothing or else simply browsing), but my *CPU,* which under 8.1x64 ran fine with AMD's Cool'nQuiet power reduction modes (like Intel's Speed Step), *also* (at the same time) kicks up to *full
power* although set in Windows to fluctuate between 10% and 100% on a demand basis.
The only cure that works is to log off and then back on...which corrects the problem for about another 20-30 minutes before both devices go to full power again. Definitely something is strange in the Win10 Preview (which I upgraded from an 8.1 installation
with none of these problems.)
Now this may or may not be tied to the problem, but for some really oddball reason Windows10TP will not let me install two innocuous utilities I've used for years: CPU-Z & HWmonitor. Win10 claims these application are incompatible with it--yet,
these are only simple hardware identifying programs--and both ran without difficulty under 8.1x64.
Suggestions appreciated...!

Mike...Thanks for the reply! This is a real head-scratcher...;) I've used the last three drivers from AMD for the gpu--same result every time. All clocks in the system bios (UEFI) are set to default, and my Win10 install is UEFI (not legacy)
and the Secure Boot State is ON. All clocks are running at defaults. I also reinstalled the Win10TP updates as I determined they weren't the problem as it continued after I uninstalled them.
Yes, C'nQ it is enabled in the bios (as I mentioned, all of this stuff worked like a clock under 8.1x64)...and that's the weird thing...Win10TP...operates exactly like it should in relation to the low power modes for around 20-30 minutes--exactly like it
did in 8.1 all the time--and then for some inexplicable reason both devices jump to full power/full speed--as if something is running that demands the power/speed--but it isn't!
I've run differing browsers with hardware acceleration turned off; I've run nothing at all apart from normal boot-up running programs, and it makes no difference. Something is throwing these devices into max-power mode after 20-30 minutes from a boot/log-off/on
having occurred.
Motherboard is MSI G46-970a, UEFI version 2.6 (latest)
CPU is AMD FX-6300 @ stock speeds & voltages
8GBs DDR 3 running with stock timings and settings (2x4GB)
HIS HD 7850 2GB running @ stock speeds/voltages
I've all through the power savings options I'm using and can't find anything that might explain this--I keep going back to the fact that this never happened even once under 8.1, and I started with 8.0 in Jan '13 and have upgraded from there--never happened
with Win7x64, either (same hardware, same settings.)
I'm wondering if maybe I ought to be running the Enterprise version of Win10TP, but I can't really think of *why* that would make a difference with these symptoms...
If you think of anything else, I'm all ears...;)
Edit: BTW, I am Migration User 1...;) I hadn't signed in when I posted the original question--I suppose--although I didn't think I could post without being signed in...

Running Arch from a live USB with persistence, on an intel Atom tablet

Hello,
I may have bitten off more than I can chew here. I am not a noob to linux, but I am a noob to Arch. I have found a few resources around but none of them quite match with what I want to do, and as such I don't want to overcomplicate what I'm doing by following instructions geared towards other objectives (such as performing a full install on a tablet).
The title I think captures it, but I will just state again what it is I want to do in a little bit more detail. I have a 2-in-1 tablet (an acer switch 10, if anybody cares) with an intel Atom processor which runs windows 8.1. I don't want to install Arch linux to the tablet, but rather have a USB with persistence that I can just plug in when I want to boot into Arch rather than windows. I've done this with several linux distros on my standard laptop, but never with Arch and never to run on a tablet. Unfortunately, I think this is made harder than it needs to be by the fact that I don't have a functioning normal laptop at the moment - if I did I would simply do all of this on there, from a linux distro. But as it happens, I only have this tablet, and it is only running windows.
I created the live USB using the software Rufus, and it boots correctly on my friend's laptop, however I have been having trouble getting it to boot from my tablet. There seem to be several things in the way of this, and I am slowly making my way through them. Firstly, I have disabled secure boot, and placed a UEFI 32-bit bootloader into the appropriate folder on the USB drive. So far this has only allowed me to avoid the automatic boot into windows that I don't experience on a normal laptop, instead taking me to the bootloader, but I don't yet know what to do from there.
So, this probably isn't entirely relevant or specific to Arch, but since I am using Arch I thought I would post this here (since more Arch specific stuff might come up as I get further). If anybody has any insight to help me out, that would be great. Otherwise, I will just continue and post any progress I have made here, and maybe this will help the 5 other people in the world who are trying to install Arch to a live USB, from windows, using only an atom-CPU tablet .
Last edited by phulcq (2014-08-18 17:00:26)

SUCCESS! Just loaded up flash media encoder and connected to
one of my flash streaming servers. The little 9" laptop handled it
beautifully. This is on the battery, wireless internet. I did
notice one thing though, I set the FPS to 30, and the highest it
would go was 15-16. Not sure if its throttling the fps because of
battery power, the ~36mbps wireless connection or what, but I'm
happy with the results! I'll try again on the battery and plugged
into the gigabit eithernet we have here at the office and report
the results. Check out the images.
The specs of the laptop are:
Dell Inspiron 9"
Windows XP Pro SP3
Intel® Atom Processor® N270 (1.6GHz/533Mhz FSB/512K
cache)
1gb ram
16gb solid state drive
1.3mp camera
http://www.bluefocusmedia.com/test_stream/intel_atom_streaming001.jpg
http://www.bluefocusmedia.com/test_stream/intel_atom_streaming002.jpg
http://www.bluefocusmedia.com/test_stream/intel_atom_streaming003.jpg

Recommendations for low power Windows Labview controller

I build a lot of battery powered Labview systems. The lowest power Windows controllers I've been able to find are the Intel Atom based units (e.g. iGoLogic iBox510 at about 3-5 Watts). I'd love to find something in the 1 Watt or less range. Does anyone have any suggestions? I'd be willing to consider non-windows solutions if they had really low power consumption.
Thanks - Gene

Yes, that is correct that the modules need to be plugged into a chassis or controller. I'll take a look into our controllers and see if any of them meet those power constraints.
Jon
Applications Engineer
National Instruments

3G IPOD SHUTS DOWN ON "LOW POWER" AFTER CONNECTING TO ITUNES 7.0.2.16

My 3G Ipod will shutdown after briefly connecting to Itunes Ver 7.0.2.16. The Ipod displays a message saying that it is out of power. However, the display shows a full power meter before connecting to Itunes. I reboot Ipod and start playing songs and the power meter slowly begins to display a full power meter. I believe the Ipod has plenty of Power -- it has been charging all day. I am able to transfer songs to the Ipod for a short period before the Ipod shows low charge and then automatically shutsdown.
HP Pavilion a250n - Intel Pentium 4 Windows XP Pro

I typically charge the Ipod with my Altec Lansing Musical Docking station or my automobile FM transmitter. So the Ipod is already powered up when I connect it to my PC via a USB cable. But it shuts down and displays a low power alarm before it shuts down. So I only use USB to update -- and this has worked fine for many years. When I try to use the firewire connection, my PC bombs (blue screen of death error).
Thanx for your comment.

Still presists in 10.6.8: AppleYukon2: 00000000,00000000 skgehw - cppSkDrvEvent - now preventing C4 low power state due to the switch ignoring pause packets

My network is constantly dropping out when transfering large files, or if there is a lot of ethernet traffic going on. For example, if I have 5 torrents runnung at the same time.
My dmesg shows:
==> /var/log/kernel.log <==
Oct 30 11:42:09 mashugana kernel[0]: Kext com.apple.iokit.AppleYukon2 not found for unload request.
==> /var/log/kernel.log <==
Oct 30 11:42:32 mashugana kernel[0]: AppleYukon2: Marvell Yukon Gigabit Adapter 88E8055 Singleport Copper SA
Oct 30 11:42:32 mashugana kernel[0]: AppleYukon2: RxRingSize <= 1024, TxRingSize 256, RX_MAX_LE 1024, TX_MAX_LE 768, ST_MAX_LE 3328
Oct 30 11:42:32 mashugana kernel[0]: yukon: Ethernet address XX:XX:XX:XX:XX
Oct 30 11:42:34 mashugana kernel[0]: Ethernet [AppleYukon2]: Link up on en0, 1-Gigabit, Full-duplex, Symmetric flow-control, Debug [796d,af48,0de1,0200,cde1,7c00]
==> /var/log/system.log <==
Oct 30 11:42:35 mashugana ntpd[42]: bind() fd 25, family 30, port 123, scope 4, addr XXXXX, in6_is_addr_multicast=0 flags=0x11 fails: Can't assign requested address
Oct 30 11:42:35 mashugana ntpd[42]: unable to create socket on en0 (11) for XXXX#123
Oct 30 11:42:38 mashugana configd[14]: network configuration changed.
==> /var/log/kernel.log <==
Oct 30 11:42:44 mashugana kernel[0]: AppleYukon2: 00000000,00000000 skgehw - cppSkDrvEvent - SK_DRV_RX_OVERFLOW: rcv fifo overflow
Oct 30 11:42:44 mashugana kernel[0]: AppleYukon2: 00000000,00000000 skgehw - cppSkDrvEvent - now preventing C4 low power state due to the switch ignoring pause packets
The only answer is to hard reboot the machine as everything hangs. Even the shell in Terminal.app is stuck which is a pitty as I feel certain that kextunload/kextload AppleYukon2.kext would free the problem but I cant even get to it.
Getting real miffed with 10.6.8 as since I upgraded I have a whole host of problems with it. I cant even plug my ipod in without itunes core dumping.

BTW: what does
now preventing C4 low power state due to the switch ignoring pause packets
mean? What are the consequences?
tia.

Is there any way an iPhone app developer can implement low power class 3 Bluetooth?

Is there any way an iPhone app developer can implement low power class 3 Bluetooth?

Ah-HA! I knew there had to be a way!
Not quite the same in 10.6, but close enough to find it:
It's iTunes>apps, not iTunes>iPhone>apps. I didn't realize there were different windows.
Not double-click, but control-click. Close enough.
Easy-Peasy, now that you showed me how.
Thanks, Barry.
--Gil

Disable Lenovo G550 Low Power Beep

I own a Lenovo G550 laptop and although many issues are bareable, the low power beeping is not. I believe it is a setting in the BIOS that controls the annoying noise. In Windows 7, muting the speaker/headphone volume was enough, but in Linux it is not. Is there any BIOS update or settings within the BIOS that I can change to disable this beeping?
BIOS: 18CN33WW (V2.06) (08/21/2009)
As shown by lshw command in Linux.

Unpack the exe package with 7Zip and edit the config file if you have one. Read carefully inside it about flags (for example: make a backup for current BIOS, reboot/halt, erase CMOS).
I'm against BIOS updates under Windows enviroment. So, you can search on Google how to make a BIOS flashing using a pendrive/dvdr under DOS enviroment.
IPnaSh
First Spanish Community Guru - Colaborador ad honorem

Intel Atom Speedstep/cpufreq

Hi!
Can anyone tell me if Speedstepping should work with Arch and Intel Atom? I've got an Intel Atom based system but I've had no luck with cpufreq.
Modprobing the modules give me errors like this
FATAL: Error inserting acpi_cpufreq (/lib/modules/2.6.28-ARCH/kernel/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.ko): No such device
I've been trying to follow how to's like this http://wiki.archlinux.org/index.php/Cpufreq
Thanks in advance!

p4-clockmod doesn't actually do freq scaling, it does what the module says - modulation. Which is a whole different thing that doesn't actually bring any benefits. I've had a nice link where all this was explained, but I can't seem to find it now...
Edit: Found it - http://www.codemonkey.org.uk/2009/01/18 … 4clockmod/
Last edited by Gusar (2010-04-22 20:41:17)

Haswell specific linux-ck doesn't work with Haswell CPU - Intel G3258?

I tried to install Haswell optimized linux-ck. Systems always freezes at boot, after kernel and init ram disk are loaded. After some time of troubleshooting I've tried generic linux-ck kernel and it works.
My question is, why Haswell optimized linux-ck doesn't work on Haswell CPU - Intel G3258?
$ gcc -c -Q -march=native --help=target | grep march
-march= haswell
$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 60
model name : Intel(R) Pentium(R) CPU G3258 @ 3.20GHz
stepping : 3
microcode : 0x7
cpu MHz : 800.000
cache size : 3072 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer xsave rdrand lahf_lm abm arat pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust erms invpcid xsaveopt
bugs :
bogomips : 6400.16
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:
processor : 1
... again same info ...

kravecm wrote:My question is, why Haswell optimized linux-ck doesn't work on Haswell CPU - Intel G3258?
Despite being labeled as such, it doesn't have the full Haswell feature set. Among other things, AVX and AVX2 are missing. If the compiler generated code which uses AVX/AVX2 instructions, their lack can definitely cause the kernel not to boot.
Compare your cpu flags to mine:
$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 60
model name : Intel(R) Core(TM) i5-4570S CPU @ 2.90GHz
stepping : 3
microcode : 0x1c
cpu MHz : 799.992
cache size : 6144 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 4
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm ida arat pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt
bugs :
bogomips : 5786.63
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:
processor : 1

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