Questions tagged [cpu-time]
103 questions
0
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1 answer
CPU Time Limit does not work in docplex api in python
I have set up docplex api in python and I am trying to run an optimization models. Based on IBM documentation, a CPU time limit can be set for the problem using the following command:
mdl.solve(TimeLimit=60)
However, this attribute does not work…
0
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0 answers
python multiprocessing yield quantum
I would like to make use of parallelization in my program by using the python multiprocessing library. For that purpose I want to check whether an action is right doable right now and if not yield the quantum of the current process and allow the…
Learner
- 1
0
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2 answers
CPU time in docplex - Python
Let us assume that I have created a mathematical model in python and want to solve it using the below code (the docplex library.)
start = time.perf_counter() # CPU time calculator of the CPLEX solver
# Obj 1
mdl.minimize(obj1)
solution =…
mdslt
- 155
- 1
- 10
0
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1 answer
Compute the "Time Complexity"
I hope you are doing well,
I am computing the Time Complexity of my algorithm which has three nested for, but I did a trick by putting an if in the latest for like:
for (i=0 ; i
Arash Marashian
- 3
- 3
0
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1 answer
How to get actual CPU time for some Python3 code
In general, I use time.time() to get CPU time for some my codes, for example:
import time
t_start = time.time()
my_code()
t_end = time.time()
cpu_usage_time = t_end - t_start
But actually, I don't know whether the cpu_usage_time is all used for my…
ShawnHe
- 15
- 3
0
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1 answer
RcppArmadillo function cpu times do not seem to scale linearly by increasing the data dimension and data size
I have written a function in both R and Rcpp, which basically just takes in a data-set x, a scale parameter gamma and a vector parameter beta, and hence returns the fitted probabilities. Below is the my code in…
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0 answers
Is using for loop faster for the computer than repeated instructions?
What I mean is which would be faster for a computer to execute.
The following code is in python3.
for in range(10):
print('billy bob')
OR
print('billy bob')
print('billy bob')
print('billy bob')
print('billy bob')
print('billy…
epiconan
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- 1
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0 answers
Does creating more threads and running them concurrently increase the CPU time of a process?
My question is why does running concurrently reduces execution time(compared to the sequential run of tasks in one thread)?
As every process has a CPU time, it is only possible if the CPU time is increased when multiple threads are created and are…
lynxx
- 544
- 3
- 18
0
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1 answer
Performance.now() in a multi threaded context
I need to use web workers for a demanding computation. I have const t0 = performance.now() and const t1 = performance.now() respectively at the beginning and the end of my code. I want to report t1 - t0 as the time required to perform the…
rucquoy
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- 2
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Conversion of function cputime to function tic toc
How to convert the cputime function to tic toc?
syms x
error = 0;
fun = 0;
N = 10;
b = 4;
a = 0;
f = (1+x)^(3/2);
f1 = @(y)(1+y)^(3/2);
t = cputime;
fun1 = double(int(f,x,a,b));
for N = 10:1000
fun = 0;
h = (b-a)/N;
for i = 0:h:4-h
…
عبدالكريم المطيري
- 17
- 1
0
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1 answer
What is the " Unit " of time returned by psutil.cpu_times()?
Is it seconds? I am trying to match it with the output of top -n 1 | grep Cpu command, and they look different!
>>> psutil.cpu_times()
scputimes(user=678.99, nice=2.15, system=405.34, idle=414554.14, iowait=12.95, irq=0.0, softirq=2.43, steal=95.2,…
Anjana Shivangi
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- 19
0
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1 answer
cpu time jumps a lot in virtual machine
I have a C++ program running with 20 threads (boost threads) on one of the RHEL6.5 systems virtualized in dell server. The result is deterministic, but the cpu time and wall time varies a lot in different runs. Sometimes, it takes 200s cpu time to…
Novak
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- 3
0
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1 answer
What takes less CPU time/ what is faster/smaller load? AddOrUpdate or if/else with TryAdd?
I have KeyValuePairs and i want to add the new value to a ConcurrentDictonary. If the key is not contained i want to add it.
But what is faster/better:
this:
dict.AddOrUpdate(pair.Key, pair.Value, (ok, ov) => pair.Value);
or this:
if…
0
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2 answers
grafana convert ps_cputime into percentage
I trying to plot memcached data in influxdb + grafana and i found ps_cputime is in microsecond.
How do i convert it in human readable format so easy to understand.
influxdb:
> select * from memcached_syst limit 10;
name: memcached_syst
time …
Satish
- 16,544
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- 149
0
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0 answers
isThreadCpuTimeSupported returning negative
I've been pulling my hair out over this. My program is supposed to measure the CPU time in searching a hashtable that uses a simple double hashing algorithm. However, ThreadMXBean keeps returning me -1. Any help is appreciated.
Snippet of…
Cheryl
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