The cpu tag has no wiki summary.
-1
votes
1answer
51 views
which Xeon CPU series is better? [closed]
I tried to read the series number?
There are 5600, 5500,E3,E7, 7500, 3400, Opteron 6000, Opteron 4000 etc
So which one is better?
And within each series, is that the higher the number the better? ...
2
votes
2answers
27 views
Optimal number of threads for compute-intensive task on server with Hyperthreading
When running a compute-intensive task on a server with an Intel i7 quad-core processor with Hyperthreading, is it ideal to run eight threads (for the eight virtual cores), or only four (for the four ...
2
votes
2answers
65 views
Linux load averages and possible danger?
I have an box I built out of some parts I have around my office.
I used an old Intel Core CPU (not core2) @2.0ghz with 2 cores.
The box is running Ubuntu 11.10 64-bit server edition, it serves as my ...
1
vote
1answer
38 views
Server Processor Selection Criteria & Profiling
We are purchasing a server to run various Bioinformatics software packages. The main package on our test machine is multi threaded and is totally CPU bound, the IO & RAM are not limiting ...
-1
votes
1answer
27 views
Do AM3 sockets support AM3+? [closed]
I am looking at upgrading my CPU. My motherboard supports AM3, and the CPU that I am looking at is AM3+.
So my question is, do AM3 sockets support AM3+ CPUs?
My motherboard is a ASUSTeK ...
0
votes
3answers
50 views
CPU context switch per/second increasing with network traffic increasing
I have server with ubuntu server operation system, i have some applications on it which works with network. With an increase in network traffic, CPU context swithching and interrupts are also ...
3
votes
0answers
101 views
Why does top report the incorrect CPU usage? [migrated]
I have a machine with Intel(R) Xeon(R) CPU E5520 visible as 16 logical cores (8 with HT). If I run something to eat CPU time (single threaded) top correctly reports 100% CPU usage for the process but ...
1
vote
0answers
70 views
LXC deteriorates CPU performance over time
I have a machine with 2 LXC containers.
As time passes, the %sys used by CPUs increases regularly. After about 4 weeks, it reaches 40-60% all the time (on each of the 8 CPUs) and makes the machine ...
0
votes
2answers
103 views
Load Average cpu linux server
i have a problem with the load average on server,
I'm using on server
When I check the processor - with "top" command
I see that :
top - 04:27:37 up 39 min, 1 user, load average: 0.78, 0.77, 0.77
...
0
votes
2answers
100 views
Force a process to use a particular cpu core? [closed]
Possible Duplicate:
Is it possible to limit a Linux process so that it can only run on a particular core on a particular machine?
I would like to know how can I bind a process to a ...
3
votes
2answers
119 views
Why does a CP command on linux consume CPU?
I just run a copy command for two large directories with a small number of huge files and I see my cp process is consuming around half a core in top:
51116 root 20 0 110m 876 688 D 43.9 ...
0
votes
1answer
53 views
What is the difference betwwen two Xeon CPUs with stepping 11 and 7?
Would you please explain me what kind of differences between these two CPUs have:
1)
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : ...
-1
votes
1answer
49 views
Where is a TCP/IP connection established?
When a TCP/IP Connection is established, is all handled at the network interface (NIC) level or does it also hit the OS kernel?
If so, is it expensive to the CPU (in terms of CPU cycles)?
3
votes
1answer
76 views
Why do server vendors always ship them with disabled hardware virtualization support? [closed]
Possible Duplicate:
Enabling hardware virtualisation BIOS; anything to beware?
This, which seem to be common practice for all hardware vendors, has been bugging me for a while: why is ...
0
votes
2answers
46 views
Top not showing processes using CPU resources
I have this output from top for the top 10 processes sorted by CPU usage descending:
top - 11:19:58 up 1:46, 2 users, load average: 3.22, 3.48, 3.34
Tasks: 66 total, 5 running, 61 sleeping, ...
0
votes
2answers
144 views
What to do when the server load over 1.0?
I noticed in cpanel that server load over 1.0 sometimes and that causes my website to take a long time to respond!!
I am wondering now what to do. Should I limit access to my website through ...
0
votes
1answer
33 views
Best upgrade option for socket LGA771 Intel platform?
I've got a dual CPU Intel Dual-Core Xeon E5140 system. What's my best option to max the system performance-wise by CPU upgrading. It's an IBM server with LGA771 sockets. It's meant for typical LAMP ...
1
vote
2answers
178 views
lm_sensors reports wrong temperature on Supermicro X8DT3?
Here's my system info:
System Information
Manufacturer: Supermicro
Product Name: X8DT3
Version: 1234567890
Serial Number: 1234567890
UUID: 3EFC338F-2038-F257-3B5E-0025902BF938
...
3
votes
2answers
101 views
Why data sending is heavier for CPU than data receiving?
I have a Samba server configured in my PC.
When other PCs in LAN download data from the server, top command shows smbd occupies 75% CPU.
While they transfer data to the server, top command shows smbd ...
0
votes
1answer
39 views
APIC error on CPU1: 60(60) in dmesg what does it mean?
APIC error on CPU1: 60(60) in my dmesg log. What does it mean? Should I be worried! Is this some hardware issue?
2
votes
4answers
114 views
CPU - Virtualization Technology (Intel VT) in a Laptop [closed]
I have a Dell laptop I bought in 2006 and it has Virtualization Technology option in the BIOS.
My CPU is an Intel T7200.
For me, the VT option is used to use ESXi or Hyper-V on a machine, but on a ...
4
votes
2answers
79 views
Number of logical processors per VM?
I have a server (quad core) running Windows Hyper-V Server 2008 R2 with two Windows Server 208 R2 Standard guest virtual machines.
I've noticed the number of logical processors setting (under the ...
1
vote
1answer
43 views
Cgroups vs Tasksets in KVM
I have a CentOS 6 host for several KVM VMs with FreeBSD as guest.
I want to bind each VM to use no more than one core at once. What would you suggest to use, Cgroups or Tasksets?
1
vote
3answers
70 views
Will I need more system resources to run DB2 instead of MySQL?
I need to convert my web application from MySQL to run on DB2. I need to know in advance whether I will need a high spec server to ensure the web application performs at the same speed as it does now ...
0
votes
4answers
123 views
Which virtualization for High CPU environment
I built a freebsd guest OS for a custom Java application. No Gui, no frills, just SSH and an API to coordinate all the machines.
This application is inherently single-threaded, and it is only limited ...
3
votes
3answers
236 views
How to fix “BUG: soft lockup - CPU#0 stuck for 17163091968s”?
UPDATE: I updated the title of the message, because I've recently seen more of these problems with this exact time amount of 17163091968s. This should help people investigating the symptoms to find ...
0
votes
1answer
272 views
High system CPU usage in Centos with cPanel/WHM
After installing and configuring WHM/cPanel on Centos 5.7, it seems that often when I try to access WHM, cPanel, or one of the 3 websites sitting on the server, everything freezes (WHM, cPanel and all ...
0
votes
6answers
462 views
How come Core i7 (desktop) dominates Xeon (server)? [closed]
I have been using this performance benchmark results to select what CPUs to use on my web server and to my surprise, looks like Core i7 CPUs dominates the list pushing Xeon CPUs into the bush.
Why ...
0
votes
3answers
225 views
running a high CPU consuming process, but top/htop show ALL process cpu 0%?
all. I have these weird servers can not explained as follow:
htop
1 [||||||||||||||| 28.5%] Tasks: 53 total, 1 running
2 [|||||||||||||||| ...
1
vote
1answer
166 views
cat /proc/cpuinfo shows 3.00GHz model but 1400.000 cpu MHz?
I ran this command on ssh to see CPU info: cat /proc/cpuinfo
And it says:
...
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Pentium(R) 4 CPU ...
0
votes
1answer
52 views
pv_ops Kernel ignoring cpu hotplug under Xen 4 DomU
I have a Xen 4.0.1 DomU running Debian Squeeze with the stock 2.6.32-5 Kernel. When I add CPUs via xm-vcpu-set they correctly show up in
/sys/devices/system/cpu
but are not set online and ...
-1
votes
2answers
60 views
Please advise: Virtual machine has stopped working [closed]
We have a Solaris 10 machine that has just stopped working.
This is the error we get when we try to launch it:
2
votes
2answers
113 views
High system cpu load (%sys), system locks
For the last two weeks we are having intermittent severe spikes in system cpu usage (shown as %sys), which last for maybe half a minute, locking most processes, including ssh.
I've been trying to ...
1
vote
2answers
260 views
100% CPU load on Ubuntu 10.04.3 LTS 64bit
I have 2 days since I am trying to fix this issue, with no success.
The server is a mysql database server.
Hardware:
DELL Poweredge 1950, 2x Intel Xeon Quad Core E5345 @ 2.33GHz, 16 Gb mem, 2x 146Gb ...
7
votes
2answers
362 views
How is CPU processing speed reported in /proc/cpuinfo?
$ cat /proc/cpuinfo | grep -iE "model name|cpu MHz|processor"
processor : 0
model name : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
cpu MHz : 1600.000
processor : 1
model name : ...
3
votes
2answers
65 views
Performance implications of CPU/cores ratio
With the recent widespread adoption of multi-core CPUs, a question comes to mind: how does CPU/cores ratio relate to performance?
Which of these is better, how and why?
1 8-core CPU
2 4-core CPUs
4 ...
1
vote
0answers
57 views
MIB2 SNMP OID to get physical CPU socket count?
I am trying to set up a monitoring system and I'm noticing that MIB-2 seems to only report the virtual CPU count (all cores+hyperthreading). I need to get the physical socket CPU count. Is there any ...
0
votes
1answer
47 views
proceses cpu load history
I would ask if there is some linux tool that can track load of each application process and save it to the log file. When something in linux system "eat" CPU to 100% and I want see what happend and ...
-1
votes
3answers
124 views
LINUX Load average
My server Load jump high up top 22, CPU just 50%, RAM 1858/5120. How to know what process couse so high load average. Linux Debian
0
votes
1answer
43 views
Extreme CPU load [closed]
Possible Duplicate:
How Can Linux Top Show 2% Idle, but Load Say 1.20?
Something strange has suddenly happend and I need help. top shows only 1 running process with >300 waiting. CPU load ...
1
vote
2answers
70 views
How to troubleshoot a jump in CPU load?
If monitoring shows a jump in CPU load on your main production server and the box is slow to respond, what actions should I take? What commands should I run or how do I troubleshoot this?
0
votes
1answer
185 views
Debian - kjournald eats up my CPU and shuts my web server
The kjournald process starts sometimes on my Debian web server.
When I run top, the kjournald process eats up 100% of the CPU utilization.
After an hour that the process runs, my web server (apache) ...
1
vote
0answers
112 views
Apache 2.2.16 with mod_php on Debian Squeeze CPU high load
Configuration:
CPU 16 cores
14 GB RAM
Apache 2.2.16
PHP 5.3.3-7 with enabled APC
Apache mpm config:
StartServers 50
MinSpareServers 50
MaxSpareServers 256
...
3
votes
3answers
139 views
Best orientation for CPU blower/cooler in 1U chassis
I'm putting together a 1U rackmounted PC. I have a blower cooler for the CPU, but the chassis has no fans at all.
What would be the correct way to orientate the CPU cooler? With the air blowing in ...
0
votes
1answer
122 views
Total CPU Utilization of a Server
How to find total CPU utilization of a server using SNMP ? I am trying to find the CPU utilization % of one server having 64 CPU's ?
Thanks.
-1
votes
1answer
157 views
CPU Diagnostic Software
Is there any decent (preferably free) CPU diagnostic software out there? It would need to be either *nix compatible or bootable because this is an ESXi server, and does not run Windows or a proper ...
0
votes
2answers
279 views
Will adding more ram decrease CPU use?
I had a virtual server with 2GB ram and average use was always under 1GB of ram, so I got a new one for exact same purpose and I only got 1GB of ram. But it seems to me that it uses more CPU now.
...
3
votes
1answer
48 views
What item-key to monitor when looking for CPU interrupts in Zabbix 1.8.2
What is the proper item-key to monitor when looking for CPU interrupts caused by NICs.
0
votes
2answers
133 views
KVM and virtual to physical CPU mapping
I'm a relative late comer to the virtualistion party, so you'll have to forgive me if this seems like an obvious question.
If I have a server with 12 cores available, does each KVM guest have access ...
0
votes
1answer
315 views
linux kernel 3.0.0 i7 CPU overheats and locks up
The server with i7 CPU (Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz) under linux kernel 3.0.0 (3.0.0-10-server) generally works properly, but when it is put under heavy load - it overheats (as shown by ...
