The multi-core tag has no wiki summary.
-1
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2answers
48 views
Multi-CPU server with CPUs of differing core counts
Is it possible to have a multi-CPU server where the CPUs do not necessarily have the same number of core counts?
For example, a group of 4 at dual core and a group of four at quad core?
This ...
-1
votes
1answer
30 views
Tracking down high CPU core utilisation
I have a system with 24 cores and for some reason only the first core is at 100% utilisation while the others are in the range of 20-25%.
I would like to get all processes that are running on the ...
1
vote
0answers
41 views
Zend Server using only 1 of 8 cpu cores
My understanding is that Apache (and hence Zend Server) should automatically send requests to all available cores. However, on our client's virtualized CentOS server, only one core is fielding ...
0
votes
2answers
400 views
Execute curl requests in parallel in bash
What is the best way to execute 5 curl requests in parallel from a bash script? I can't run them in serial for performance reasons.
1
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2answers
186 views
Is there a limitations to the number of cores on Windows 7 64 operating system?
Is there a limitation to the number of cores a Windows 7 64 bit operating system can support? I am planning to use that as render server. Rendering software is truly multi-threaded. I am getting a 32 ...
0
votes
2answers
188 views
Linux: One cpu core is always in 0 use
Today I notice a very strange thing. One cpu core is always in 0 use
.
Is it a bug?
Cpu0 : 0.0%us, 0.0%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi,100.0%si, 0.0%st
Cpu1 : 37.7%us, 44.4%sy, 0.0%ni, ...
0
votes
0answers
170 views
Why does CentOS Linux use cpu/core #1 so much more in a 4-core system?
I've been watching top and htop for awhile on a very active server and I am wondering why linux does not automatically use cpu affinity better?
CPU #1 (actually core #1 of 4) is used much more ...
0
votes
0answers
56 views
Using multiple cores on IIS7
We have an ASP.NET MVC appplication that is hosted on a multicore system.
The performance increased dramatically when we set the application pool in IIS to use multiple processes (webgarden)
Because ...
4
votes
1answer
294 views
Difference between Processors and CPU core
can any one please clarify the difference between actual no of processors and CPU cores.
in my case i am having Intel Xeon® Processor E5620 as per intels product page: its having
# of Cores 4
# of ...
1
vote
0answers
103 views
making use of multiple cores with autobench/httperf
I would like to benchmark a powerfull webcluster with autobench. The problem is that autobench (which uses httperf) can only use one core, thus limiting the amount of load that a client can put on the ...
0
votes
4answers
287 views
Web- and DB-Server: High clock rate and less cores vs. less clock rate and many cores
I am currently looking into setting up a new infrastructure for a hosting project of mine. Basically it will be managed hosting with a strong focus on Django-based apps. All will be Linux-based of ...
2
votes
4answers
216 views
Should I expect a great increase in Oracle performance in terms of handling multiple requests switching from single to dual core?
We have an Oracle database of roughly 100 GB that runs on top of a Windows Server 2k3R2 VM in ESX in a 1 socket, 1 core configuration. Whenever it has to handle a major query it seems to get "pegged" ...
1
vote
1answer
510 views
Nginx worker_processes and multi core cpu's - Do Hyper-threading cores count?
Quite often, when reading about the recommended worker_processes for nginx it is stated that this should be set to the numbers of cores the server hosting nginx has.
We were wondering if we should ...
-4
votes
1answer
108 views
Hyperthreading can only create two threads? [closed]
HyperThreading can only create two cores/threads ?
More can not be created by design or is there any other limitation ?
0
votes
1answer
185 views
On Multiple Processors sytem, System load is high while most of CPUS are idle
See the following output of "top". Any idea?
top - 17:33:25 up 7 days, 28 min, 4 users, load average: 12.04, 8.35, 6.30
Tasks: 477 total, 2 running, 474 sleeping, 0 stopped, 1 zombie
Cpu0 ...
2
votes
1answer
282 views
CPU Throttling on Opteron 6272 in Windows
I'm in the process of attempting to benchmark a multithreaded application on my new HP Proliant Server which has an 2x Opteron 6272 and 64gb of ram.
When I run the application on a desktop machine (a ...
1
vote
2answers
904 views
VMware ESXi Virtual Machine configuration for hyperthreading
I have a Xeon E3-1230 processor, which has 4 physical cores, but has hyperthreading so an operating system running on it sees 8 logical cores.
I installed VMware ESXi and am creating virtual machines ...
1
vote
1answer
74 views
Assigning cores to VM in vSphere
Complete vSphere newbie here...
Background:
So, I have a 12 core machine with 24 VMs on it. Currently, all the processing power is shared between these VMs equally.
The question:
Can I configure ...
1
vote
2answers
616 views
Will all cores be used on an i7 when running SQL Server 2008 R2 Standard
I have a server with an Intel Core i7 processor (4 cores). If I view processor activity in Task Manager I see that there are 8 cores. I believe that this is because of hyperthreading (please correct ...
0
votes
3answers
164 views
How can I run command and select core to be used
I have a command to run (in this case is a php5 script) and I would like to know if there is something to run this command and select the core to be runed.
What I want to do is to run 1 command per ...
0
votes
4answers
936 views
How to force a process to run on a particular cpu?
I know that taskset can be used to force a process to run on a particular cpu.
How can I force tomcat to run on a particular CPU?
I then want to run apache bench on a seperate CPU.
Update
I ...
-3
votes
3answers
324 views
Why do I need six cores in a cpu for a server? [closed]
I was getting specs for dell server and one cpu is an Intel Xeon with 6 cores, another 4 cores. What am I getting with this? Do I need six cores? What does that give me? I don't know what ...
0
votes
1answer
318 views
Tomcat performing terribly for no apparent reason
We're running a game application .WAR on Tomcat 6 on an Amazon EC2 server, 8 core processor, 7gb RAM. The application uses a MySQL database hosted on Amazon RDS.
This Facebook application takes ages ...
1
vote
2answers
544 views
Hyperthreading on multicore processors - is it of any use? [closed]
I know hyperthreading from the time long ago where the processors used to have only a single core. The technology was really usefull then. Right now, Intel is still offering hyperthreading with 6-core ...
3
votes
2answers
106 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 ...
2
votes
5answers
541 views
How can I move a process to a core or dedicate a process to a processor?
I have an Intel E5620 processor. I have used cat /proc/[pid]/stat to determine what processor the process was last run on (39th field). How can I ensure that a process is dedicated to a processor (I ...
1
vote
3answers
2k views
Setting up Apache to use multiple cores
Recently I have purchased a 6 core server which is running Ubuntu 10.04 and Apache. How do you set up apache to use all 6 cores and what is the best practice to do this?
Is it possible and if it is ...
7
votes
1answer
2k views
MySQL and Multi-Core processors
I'm running MySQL on win2008 server on a multi-core xeon processor.
It looks like it only uses a single core.
Is there something I need to configure to make it use all cores ?
The server is ...
2
votes
1answer
161 views
Q9650 vs. i7-870 for Server
One of our dedicated machines we use for hosting in London has exceeded the CPU usage, so I contacted the datacenter last week for a quote on an upgrade. We are hosting game servers, and most of these ...
2
votes
1answer
355 views
IIS 7.5 application pool CPU configuration
I have a web application that when runs on windows 2008 r2 data center edition and when the server is configured with a single core processor consumes 13 mb ram, when configured to run on dual core ...
1
vote
1answer
175 views
Java doesn't seem to utilize more than two cpus
In my current setup (debian squeeze x64, 6 cpus) neither java nor apache seem to utilitze the full potential of the server. The munin monitoring shows cpu usage never exceeds the 200% mark. We ran ...
1
vote
4answers
372 views
Free alternative to NI Real-Time Hypervisor?
Is there an free alternative to National Instruments' NI Real-Time Hypervisor? National Instruments provides both a Windows and Linux versions.
2
votes
2answers
387 views
How to find out if my debian server setup is a dual core or not?
I have access to root and would like to find out.
Thanks
1
vote
3answers
492 views
mpstat not showing all CPUs on CentOS 5.5 (64 bit)
I have two Quad Core XEON processors. When I run "mpstat" then it just shows combine figure of all CPUs like this:
12:16:44 AM CPU %user %nice %sys %iowait %irq %soft %steal %idle ...
1
vote
3answers
2k views
How to get Windows Server 2008 VM to use multiple cores
I have a Windows Server 2008 machine running in VirtualBox. On initial installation, only one processor was made available, but now I want to run it as a multiprocessor machine.
I have made all four ...
2
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4answers
1k views
rsync with multi-core server should go faster than it goes. Am I wrong?
I'm launching a rsync simple command between two servers. Both servers have two eth interfaces on bonding. When I send a big file from one server to the other with rsync I reach 130M/s transfer ...
2
votes
1answer
880 views
Many instances of sql express use all the same cpu?
Sql Server Express has the following major hardware limitations that has a consequence on performance:
1 CPU
1GB of memory
My question is: if on a multicore machine many instances of sql server ...
6
votes
4answers
853 views
need high performance /bin/sort; any suggestions?
Greetings,
I'm looking for a high performance /bin/sort drop in replacement. I know there is pbzip2 for using multiple cores, but is there a similar product for /bin/sort?
I've found distsort.sh, ...
3
votes
2answers
1k views
top in batch mode, need CPU% for every core
I know that after running top, I can press '1' and get a list of the CPUs with their utilization percentages. I suspect I can do this in batch mode too with the -b option, but I don't know how, and I ...
0
votes
2answers
779 views
Multicore license: ESX Vs Citrix Xenserver [duplicate]
Possible Duplicate:
Can you help me with my software licensing question?
VMware ESX is free for upto 6 cores per CPU only
Vsphere Advanced version is required for 12 CPU cores
does ...
1
vote
2answers
166 views
SQL server availability issue: large query stops other connections from connecting
I've got a high-spec (multicore, RAID) server running MS SQL 2008, with several databases on it. I have a low throughput process that periodically needs a small amount of information from one of the ...
2
votes
1answer
745 views
Can Windows 2008 64bit make use of a 6 core cpu?
There's a version of AMD Phenom CPU which is 6 cores. Would Windows 2008 64 bit & SQL Server 2008 64 bit make use of all the cores? Any special settings of the OS or sql server needed to benefit ...
2
votes
2answers
951 views
Running a VM on a hyperthreaded CPU
Is it better to run a VM on a dual core hyperthreaded machine as a four core or as a two core VM.
The hyperthreaded 'virtual' cores are not as fast as the real cores. Does this effect the VM?
4
votes
2answers
1k views
Xen - Make one guest OS have 2 cpus?
I have inherited a Xen setup. The dom0 and domU's are all linux. dom0 has 8 cores (or CPUs, I'm not sure). We want to run more stuff on one domU. I want to make it a multicore CPU, ie so that the domU ...
3
votes
4answers
5k views
Why does my Windows 7 VM running under Linux' KVM not use all the virtual processors?
All
I've had a problem on my server since I migrated one of my VM's from Windows 2008 Server to Windows 7 (ultimate): though I've assigned four cores to the VM and it even seems to see them, it seems ...
1
vote
3answers
5k views
More RAM or More Cores for a MySQL Database Server?
Here's the scenario, which I'd love your expert advice on:
I've got about 2GB of database currently, maybe double that in a year. I want the optimum server performance for the dedicated DB server I'm ...
1
vote
2answers
531 views
SQL Server 2005 preferring a single core per cpu?
HI folks,
I've a SQL Server 2005 system, with 4 cpus in it each with 4 cores. It's currently mainly utilising just 4 cores, ie 4 hover around 90% utilisation at peak and the others closer to 30%. I'm ...
1
vote
2answers
348 views
Two Xeon Processors with Different Clock Speeds on the Same Motherboard: Possible?
If I have a 2.0gHz Woodcrest 5130 Xeon and a 1.6gHz Woodcrest 5110 Xeon, can I put them both on the same motherboard?
The machine in question is a PowerEdge 2950.
0
votes
1answer
669 views
Hardware virtualization support for Core i7 + P55
I'm considering a hardware upgrade from AMD Opteron 1216 to a Core i7 920 or Core i7 860. I want to know if Hardware Virtualization (VT-X) is supported? I found the spec sheets online which say yes. ...
5
votes
2answers
9k views
Disable CPU cores in bios?
Is it possible to disable CPU (Intel) cores in BIOS, and if yes what HP/DELL (others?) 1U/2U servers would allow this?
It is becoming difficult to find new server hardware with dual core CPUs, most ...
