What i meant was, in a multicore system with 'n' number of cpu's, will each cpu have its own linux kernel installed, or will all cpu's have a copy of the same kernel image? Another question regarding multicore is kernel tracing. Since tracing works at the kernel level, then should i perform tracing for each cpu's seperately or kernel tracing can be performed as a whole for all cpu's put-together?
View 3 RepliesI wish to know that which gcc release version had support on ARM 9 multicore system by using pthread library for its parallelizing method on ecos rtos.I assume that the compiler that support the single ARM 9 processor will surely compile its multicore version also.But i need a clarification about it.It is good if you give a article or provide a suitable link on the ARM multicore programming and its compilation method
View 1 Replies View RelatedI am experiencing a multicpre problem with fedora14 / kernel 2.6.35.6-45.fc14.x86_64 #1 SMP. (standard from the distro). The host has a total of 2 cores .yet a virtual machine started with 'smp 2' ( or xml : <vcpu>2</vcpu>) will not run on 2 pyhs cores . it will use just 1 core ('top' at the host shows 100%cpu while running an endless loop process on the VM) and libvirt 'virsh vcpuinfo <vm name>' shows only 1 physical cpu used (although 2 vcpus are used : 0, 1) The kernel seems to be an SMP one ( so says the uname -a . what does '#1 SMP' mean ?) . Am I missing something ? same XML on a DEBIAN machine will run the VM with 2 phys cores as should although the host there has 4 cores (>2)Should I recompile the kernel src with some addtional flag ?
View 7 Replies View RelatedI've got an intel i7 920 CPU. It has 4 cores, but thanks to hyper threading technology each core could run 2 threads so in /proc/cpuinfo it shows "8 processors".
1. what would be the optimal -j flag when compiling programs on my CPU. I've come across -j7. Why 7?
2. Where and what would I put this flag to make it permanent (eg. .bashrc?)?
I'm wondering if anyone is having a similar issue to what I'm experiencing. openSuSE 11.2 was very fast on my system. Since installing openSuSE 11.3, I've been experiencing many short term hangs where I'll lose control of the mouse for a few seconds (usually about 2-5) and the system will do nothing. I don't have unusual load during these time periods and I don't really see any spikes during these periods. If I leave a cpu monitor active, I can see a very very light spike one core0 when it happens, but the mouse and keyboard (and seemingly the whole desktop) hang during this spike so I can't see what's causing it, if that's really the culprit.
I am almost suspecting that I'm experiencing an issue with interrupts... since it seems that everything is hanging for a few seconds, then coming back to life. It does seem to happen more often when I'm resizing or minimizing windows... but that's about all I can say as it also seems pretty random.Here's some basic info on my hardware:ASUS M3A78 Pro motherboardAMD Phenom(tm) 9950 Quad-Core ProcessorGeForce GTX 260G15 Keyboard and MX revolution mouse (just in case USB interrupts turn out to be the issue)So, is anyone else experiencing a similar issue? Maybe we can narrow down what we have in common. Oh, I'm running x86_64.
I have recently loaded the new LTS SERVER 10.04 release and it loaded without errors. My only issue is that it does not seem to correctly identify the Dual Cores for each processor. (The HP xw9300 I have has two hardware CPUs - each one being Dual-Core - so there should be a total of 4 CPUs recognized - unless I am mistaken?) How I can debug the processor recognition for multi-core support to get the additional cores recognized.
My /proc/cpuinfo file looks like this:
Code:
xxxx@hostname:~$ cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 15
model : 37
model name : AMD Opteron(tm) Processor 248
stepping : 1
cpu MHz : 2194.452
cache size : 1024 KB .....
address sizes : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp
I have been searching for the multicore scheduler support for ARM, in linux kernel.
CONFIG_SCHED_MC, CONFIG_SMP are there for x86..what about ARM ? will the same configs do the job...
What is kernel in Linux operating system?
View 6 Replies View RelatedRecently,I am learnning about the LFS and I can not understand the relationship between the kernel and file system !!It is so annoyed because I want to understand the LFS deeply.who can describe the relationship between them!and who can give me a simple example?
View 1 Replies View RelatedI want to add Sandy bridge support to linux 2.6.32.20.I have linux kernel 2.6.32.20 ,and Sandy bridge changes were added from kernel 2.6.33.4.Please can anyone suggest how to backport the kernel support for Sandy bridge.
View 2 Replies View RelatedWhich "flavour" and version of linux I am running? Below I see GNU/Linux which I understand to be a linux kernel and the free GNU operating system. But someone definitely said I had "debian" installed(?)
Code:
This error message appears in the varlog
The situation is I removed the ADSL card from my desktop as I have no use for it for the moment. I am guessing that the motherboard is still trying to detect the Sangoma ADSL card. What is the best way to resolve this problem, uninstall the drivers for the ADSL card or change the settings in the system configuration files?
The system is not affected by this removal, just get prompted regularly about this error as configured in the kerneloops client.
I accidentally deleted my .config for my kernel configuration on Linux, and seem to remember there was a way to retrieve the kernel configuration via the proc filesystem somehow. Is this still possible, and if so how would I do it?
View 1 Replies View RelatedI use Redhat 2 server, the server suddenly can't boot now , it goes to the grub> mode, it can't boot to Redhat kernel
View 5 Replies View RelatedI've got a problem with my 3G modem [Huawei E122].
It has internal storage and kernel assigns a device [/dev/sdX] to it.
Because of that, every second time my machine will not boot - kernel panic - as my usb hdd gets assigned /dev/sdb instead of /dev/sda.
I cannot use LABEL nor UUID in root= kernel parameter, as it is only available when using initrd, and I can't use it - I am using Debian on my router - mips architecture machine.
I have to prevent this from happening, as my router has to start everyday and I have to be sure it works ok. I don't have physical access to restart it when something goes wrong.
I don't use my modem internal storage, there's no SD card inserted. However kernel detects the reader and loads it.
I can not prevent loading od usb drivers since my hdd is on USB as well.
I updated this on jul 21 using comments below Torque is a batch job queuing system that is used on clusters. But I find it handy to use it on my multi-core workstation as well. It allows jobs that need to be run to be schedule by multiple users. The scheduler will make sure that not too many jobs are run simultaneously which could cause high system loads or memory issues. I previously posted how to install torque on ubuntu hardy from the torque source package. However, torque is now in the repositories of lucid and here are the steps that I had to take to get it to work on my workstation.
For this setup I kept the server host name 'torqueserver' which is the default in the package. You can do the same or use a fully qualified domain name. In that case, you will have to adept the steps somewhat. My workstation has 8 cores, and I only want to give 6 of them to the que. Please adapt your numbers accordingly.
0) open root terminal
Code:
sudo -s
1) add torqueserver as an alias to /etc/hosts.
Code:
gedit /etc/hosts
change 127.0.1.1myHostName to 127.0.1.1myHostName torqueserver*) see post by drlemon.
Alternatively use a resolvable host name (check with 'host $HOSTNAME') in the file:
/var/lib/torque/server_name and whereever torqueserver is used below, use that host name
2) install torque from repositories
Code:
apt-get install torque*
[code]....
This works for me but probably requires more configuration in a demanding computing environment. Check out the torque website for more queue configurations, user management etc.
i want to add a new system call.im following this guide [URL] in this step 6 he said add __NR_mycall to some number, in unistd.h. in include/asm/unistd.h there are are around 1079 calls for different hardwares. and the __NR_SYSCALLS is also defined many places. I don't know where to add my new system call. and another qn is. whether the number for syscall in unistd.h and arch/x86/syscall_32.s both should be same?or they can be different.
View 2 Replies View RelatedIf I have SMP kernel would it work with single processor or only work with multiple processors system?
View 6 Replies View RelatedThe 486 kernel works just fine, and while I have only 1GB of RAM at the moment I hope to have 2GB someday and would like to take advantage of the dual core CPU, so I would like to configure grub to run the 686 kernel by default. For whatever reason, it runs the 486 right now and the 686 fails in a major way: there is no network connectivity at all. It could be plugged into my cable modem router and it shows no wired connections. The fact that one works and the other doesn't puzzles me since I haven't touched either since the install and a few rounds of upgrades.
I should mention I'm newbie but getting better; I managed to install debian on this x60, yet while preserving the factory install rescue & recovery partition and preserving the factory install MBR so that ibm-specific hardware functions (thinkvantage button, etc.) still work. This required me to use dd to copy the first 512 bytes of my debian partition to a file in the windows partition, etc., and modifying the windows bootloader. (I wish I had learned dd long ago--it rocks). I did this because if I ever resell the X60, the fact is most people use MS Windows and having that partition adds a perception of value to some potential buyers; not to mention I paid $ for it (I was young & stupid) so why should I delete it. I also backed up the recovery partition on another drive using dd over NFS in case the hd ever heads south.
Anyway, I've never been comfy with messing with the kernel. I did once recompile a module for ALSA because it had a bug in it for an old Yamaha integrated sound card on an old PIII and the newer version worked [alsa fails on this x60 too but I think I found a post on here that has a solution I will try later]. But I'm clueless as to networking modules, not to mention the correct module is installed already from Intel for this chipset. So what is there to do?
Here's a clue: the ifconfig output is radically different from the 686 and 486 kernels. Looks like hardware is not being detected since eth0 fails to show:
I would show the diff output below if it weren't so long--and not allowed--upon 2 text files, the first holding the output of modprobe -l under the 486 kernel and the second under the 686 kernel.
I'm trying to run extract-ikconfig because I've mistakenly deleted an old kernel config that I'd like to recover. However, when running the script from the latest (2.6.32.5) tree I run into this error:
Quote:
ERROR: Unable to extract kernel configuration information.
This kernel image may not have the config info.
Coincidentally, this happens with all of my kernel images. Is it a fixable problem? I should really set CONFIG_IKCONFIG_PROC next time..
I have recompiled a few kernels, but all on 32bit systems so not sure if that has anything to do with it.
Running Arch Linux 64bit, most recent version.
Kernel Output:
Code:
My first thoughts was that it might be my grub bootloader configuration, so had a big play around with that but it didn't fix it. Also made sure support was built for filesystems. However almost all that Fstab mounts are ext3 anyway, and certainly the root and /boot are. Now thinking it may be a memory error so will run a check when I shutdown.
Dell laptop booting from a USB stick with a CentOS 5.5 minimum installation.
Uncompressing Linux...OK, booting the kernel.
Red Hat nash version 4.2.1.13 starting
sda: assuming drive cache: write through
sda: assuming drive cache: write through
mount: error 6 mounting ext3
mount: error 2 mounting none
switchroot: mount failed: 22
umount /initrd-dev failed: 2
Kernel panic - no syncing: Attempted to kill init!
1. Does minimum installation not drop on a kernel or initrd with ext3 support? I can't imagine that's true, but have to ask.
2. The USB stick is single partition ext3. Maybe there is some limitation specifically related to USB stick booting that requires boot to be FAT16 or FAT32? Except the CentOS 5.5 installer refuses to let me install on either FAT.
3. How can I do the equivalent of lsmod on a linux installation that will not boot? i.e. I have CentOS x86_64 running in VirtualBox, I can plug the USB stick in there, so how do I get information on the USB stick's kernel and initrd if I can't boot from it?
4. Is it possible to rebuild the i386 based initrd on this USB stick, when the computer is not booted from that stick, with a system that's x86_64 based?
System Info:
Dell Latitude i686 Laptop which has run CentOS 5.5 and Fedora 12,13,14 in the past, and boots from Fedora 14 Live CD transferred to a USB stick. So I know USB booting is possible on this machine, and this stick.
The process of creating the stick:
CentOS 5.5 i386 on a USB stick. Old Dell i686 laptop which has previously run CentOS 5.5 installed from DVD, and has successfully booted from this same USB stick holding transferred Fedora 12,13,14 Live CDs. CentOS 5.5 was installed onto the USB drive directly by the CentOS 5.5 DVD installer (running virtualized in VirtualBox 4.02 on Mac OS X 10.6.5.). No errors or complaints during installation.
For whatever reason, the installer did not do some things correctly. First Grub wasn't working correctly, I got that sorted out and have the Grub+CentOS splash screen, it finds vmlinuz and the initrd, and then I get a kernel panic.
Ext3 was built into the kernel and that's why I'm getting this message. I do not know how the installer would have dropped a kernel or initrd during instalation that that don't contain such a basic thing that obviously comes in linux kernel 2.6.18-89 EL.
Is there a way to get the matching Linux kernel headers automatic on a regular kernel update via the Ubuntu packed manager? Every time I get a new kernel I must do an aptitude install linux-headers-`uname -r`
View 1 Replies View RelatedI am running an Hp Pavillion dv6000 with the Broadcom card that never seems to work for Linux. I recently talked with my friend who said he found a way to get it work.following his instructions I opened Synaptic and checked the package bmcwl-kernel-source to be installed.I went through the process of it all and it said it had install successfully. I restarted the computer and when I tried to enter my operating system I got this error "Kernel panic - not syncing : VFS : Unable to mount root fs on unknown - block(8,1)"
I have previous versions of Linux on my computer so I can still get in to those if need be but I don't know how to undo what I did or why it isn't working for that matter. Does anyone have any ideas as to why I am getting this error and how I can fix it?
this is what i did i downloaded the latest stable kernel archive from kernel.org and extracted the archive into the download directory (i don't think that matters though) then i downloaded and installed the ncurses archive (needed for menuconfig) then i opened a terminal and navigated to the directory that was extracted from the archive and issues the floowing commands
View 9 Replies View RelatedCan i add another kernel 2.4 in grub while kernel 2.6.31 of ubuntu 9.10 exists
View 10 Replies View RelatedI tried to use the command: make modules_install install INSTALL_MOD_PATH=/dev/sdbX, It could install the modules and vmlinux to my usb hard disk,however, it missed the initrd file. I had tried to use mkinitrd to build one, but that one couldn't boot. My system is fedora12,as well as my usb hard disk.
View 2 Replies View RelatedWhich edition kernel are you used in your system F14. And if your video card is nvidia, and the driver edition?
Mine is 2.6.35.6-48.fc14.x86_64.
The web-link and how to install them.
I've got two systems, one with 10.10 and one with 10.04.2 LTS. The 10.10 system has the 2.6.35 series of kernels, the 10.04 system has 2.6.29 (i think) series of kernels. Is there any way to get a 2.6.35 kernel onto the 10.04 system? If so, what package(s) are needed for it to operate, assuming its possible to get said kernel onto the system?
View 5 Replies View RelatedI have upgraded my Ub-10.10 to 11.04 yesterday. Everything works well except new kernel.When i try to boot with 2.6.38 kernel, i can't get to the desktop. Only black screen.But when i try to boot with old kernel (2.6.35) from "Previous Linux" on GRUB, it works well without any problem.PC Specs >> AMD Athlon X2 5200+, ASUS M2A-VM, OCZ 2 GB DDR2 800 Mhz RAM and Palit Sonic GTS 450.
View 3 Replies View Related