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Questions tagged [multiprocessing]

17 questions
14
votes
2 answers

Two different Intel xeon e5 24xx on one dual-socket motherboard

Can I use two different e5 24xx on one dual socket motherboard or must the CPU's be identical?
user3447070
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4
votes
1 answer

Shell script: the child process do not terminate in linux

I have written a shell script to initiate three background process in the same time. In shell script I am trying to wait for all children to finish their job and then the parent job to terminate. But, with some reason I see the the sleeping…
user269867
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4
votes
1 answer

Adding vCPUs to an existing OS install

The VM configuration dialog in ESXi 5 warns me that if I change the number of vCPUs after the guest OS is installed, the sky will fall - ahem - it 'might make my virtual machine unstable.' I know that certain CPU instructions involved in thread…
Kevin
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2
votes
1 answer

LImiting overall memory usage for child processes

I have a long-running script that launches several child processes on a Linux machine with 8GB of memory. After a few hours of running, it takes up nearly 90% of memory, and this makes other services, like SSH, unresponsive when it starts disk…
Cerin
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2
votes
1 answer

Python multithreading not working on VPS server

I am running an python multithreaded application with multiple processes which scrapes data from some websites. While running on my localhost It works great, but on the vps server I am using( Centos 5.8, 2.6 GHZ with 4 cores) performs very slow.…
Sabirul Mostofa
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2
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1 answer

Apache could not be stablely support more than 200 visitors at the same time. How to set mpm module?

The server seems not be able to support almost two or three hundred people visiting at the same time. We upload some new codes in Nov. 29the and people saw 404 Not Found frequently ever since that day. First we thought that just because there are…
user534644
1
vote
0 answers

Worker processes in Celery

I have a CPU intensive Celery task and within one of the task it can be further parallelized using joblib. By default, starting a worker with celery, will create a pool with number of max concurrency equal to number of CPUs/cores (which is 36 in my…
Coderji
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1
vote
1 answer

How are threads distributed among cores in a multi-processor system?

I'm currently checking out the limits of a server application on a system with two 12-core processors, i.e. 24 cores. (Hyper-threading currently disabled). I'm running 12 UDP receive-heavy instances of that same app on that box, and it maxes out all…
Evgeniy Berezovsky
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1
vote
2 answers

Apache executed only one request and all other requestes wait first to finish

I have a basic install of Apache2 server and PHP5.3 on my local Ubuntu machine. I created file index.php and put sleep 30 seconds in it When i run "localhost/index.php" in web browser, request are waiting…
tasmaniski
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1
vote
2 answers

Is Apache 2.2.21 multi processor aware on Windows Server 2003?

I am running a webserver currently on a single CPU on a windows 2003 machine. I'm thinking of adding another processor to increase performance, as some of the web apps on the server are slowing down. Will Apache be able to even the load across the…
Imran Azad
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1
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3 answers

Is NFS capable of preserving order of operations?

I have a diskless host 'A', that has a directory NFS mounted on server 'B'. A process on A writes to two files F1 and F2 in that directory, and a process on B monitors these files for changes. Assume that B polls for changes faster than A is…
JustJeff
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0 answers

What is the actual meaning of a "C" suffix in a 2nd generation Scalable Xeon CPU (Platinum, Gold, etc)

I have an HP Z6 Workstation with a Xeon Gold 6253CL CPU (purchased from eBay) and I would like to upgrade it to a dual-CPU configuration. I have added the 2nd CPU riser card but, for selecting the processor I need help understanding Intel's part…
Eusebio Rufian-Zilbermann
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1
vote
2 answers

Benefits of hyperthreading for multiprocessing?

I'm managing a compute node in a HTC cluster. The node is a 56 cores / 112 threads dual Xeon machine, and the typical workload consists of many instances of single threaded Monte Carlo simulation jobs. Benchmarks show that the throughput scales…
Nicola Mori
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0
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1 answer

HAProxy uniform balancing between processes

We using nbproc 10 for multiprocess HAProxy. Server with Intel(R) Xeon(R) CPU E5-1650 v3 @ 3.50GHz. In config: nbproc 10 cpu-map 1 0 cpu-map 2 1 cpu-map 3 2 cpu-map 4 3 cpu-map 5 4 cpu-map 6 5 cpu-map 7 6 cpu-map 8 7 cpu-map 9 8 …
artful
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0
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1 answer

Can you put different CPUs in a dual-cpu motherboard?

I have an ASUS KCMA-D8 motherboard with two Socket C32 CPU sockets. Only one is used right now. Can if put a different (better) CPU in the other socket and have the motherboard use both? Or do motherboards with two CPU sockets require that both CPUs…
Thomas Johnson
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