The function array_sum below computes a sum of an array. Please write a version that uses multiple threads to compute the sum in parallel. (Hint: use pthread_create and pthread_join in the pthread library)
double array_sum(double *arr, int len) {
double sum = 0;
for(int i=0; i
sum += arr[i];
return sum;
}
Answers
The modified code provided demonstrates how to compute the sum of an array using multiple threads in parallel.
To compute the sum of an array using multiple threads in parallel, you can divide the array into equal-sized chunks and assign each chunk to a separate thread. Each thread will compute the sum of its assigned chunk, and the partial sums will be combined to obtain the final sum. Here's an example of how you can modify the array_sum function to achieve parallel computation using pthreads:
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
// Structure to hold the data for each thread
typedef struct {
double *arr;
int start;
int end;
double partialSum;
} ThreadData;
// Thread function to compute the sum of a chunk of the array
void* sumChunk(void* arg) {
ThreadData* data = (ThreadData*) arg;
double sum = 0;
// Compute the sum of the assigned chunk
for (int i = data->start; i < data->end; i++) {
sum += data->arr[i];
}
data->partialSum = sum;
pthread_exit(NULL);
}
// Function to compute the sum of an array using multiple threads
double array_sum(double* arr, int len, int numThreads) {
double sum = 0;
// Create an array of thread IDs and thread data
pthread_t threads[numThreads];
ThreadData threadData[numThreads];
// Calculate the chunk size
int chunkSize = len / numThreads;
int remainingElements = len % numThreads;
// Assign chunks to threads
int start = 0;
int end;
for (int i = 0; i < numThreads; i++) {
end = start + chunkSize;
if (i < remainingElements) {
end++;
}
threadData[i].arr = arr;
threadData[i].start = start;
threadData[i].end = end;
// Create a thread for each chunk
pthread_create(&threads[i], NULL, sumChunk, (void*) &threadData[i]);
start = end;
}
// Wait for all threads to finish and accumulate the partial sums
for (int i = 0; i < numThreads; i++) {
pthread_join(threads[i], NULL);
sum += threadData[i].partialSum;
}
return sum;
}
int main() {
int len = 10;
double arr[10] = {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0};
int numThreads = 4;
double sum = array_sum(arr, len, numThreads);
printf("Sum: %.2f\n", sum);
return 0;
}
In this modified code, the array_sum function takes an additional parameter numThreads to specify the number of threads to be used for parallel computation. The array is divided into chunks, each assigned to a separate thread. Each thread computes the sum of its assigned chunk, and the partial sums are accumulated to obtain the final sum.
This implementation assumes that the number of elements in the array (len) is evenly divisible by the number of threads (numThreads). If this is not the case, you may need to adjust the logic for dividing the array into chunks.
Learn more about multiple threads visit:
https://brainly.com/question/32006060
#SPJ11
Related Questions
Why would a company want to utilize a wildcard certificate for their servers? to increase the certificate's encryption key length to reduce the certificate management burden to secure the certificate's private key to extend the renewal date of the certificate see all questions back next question
Answers
a company would want to utilize a wildcard certificate for their servers to reduce the certificate management burden.
In this case, you're not dealing with multiple installations, various renewal dates, and ongoing certificate additions as your business expands. You only have control over one certificate. Simple!
Similar to how Wildcards are more affordable than securing each sub-domain separately, they are also significantly simpler from a technical and administrative perspective to safeguard your online footprint.
Follow the link below to see other measures for securing a server
https://brainly.com/question/27807243
#SPJ4
Which kind of a person will you be if you prove to be accountable for your actions?
Answers
Answer: You would be a person of integrity.
Explanation: Look up Integrity for details.
PLEASE HELP, THIS IS FROM FLVS AND THE SUBJECT IS SOCAL MEADA. YES THAT IS A CORSE.
Josh frequently posts in an online forum to talk about his favorite video game with other players. For the past few weeks, a poster he doesn't know has been harassing Josh in the forums, calling him names and publicly posting hateful messages toward Josh with the intent of starting an argument.
In this situation Josh should consider changing his forum screen name to avoid this cyberbully.
1. True
2. False
Answers
Assume that Publication is the root class of an inheritance tree. You want to form a linked list of different publications in the inheritance tree, including Book, Report, Newspaper, etc. What is the best way to create a linked list using PublListNode and Publication classes
Answers
The best way to create a linked list using PublListNode and Publication classes is the use of the PublListNode class contains the Publication class.
What is a root class?A root class is known to be inherited and it is one that defines an interface and behavior that are specific to all objects in any given hierarchy.
Note that The best way to create a linked list using PublListNode and Publication classes is the use of the PublListNode class contains the Publication class.
See options below
A.
The PublListNode class contains the Publication class.
B.
The Publication class is derived from the PublListNode class.
C.
The PublListNode class is derived from the Publication class.
D.
The Publication class contains the PublListNode class.
Learn more about root class from
https://brainly.com/question/14551375
#SPJ1
Consider the following code segment, which is intended to store the sum of all multiples of 10 between 10 and 100, inclusive (10 20 ... 100), in the variable total.
int x = 100;int total = 0;while( /* missing code */ ){total = total + x;x = x - 10;}Which of the following can be used as a replacement for /* missing code */ so that the code segment works as intended?A. x < 100.B. x <= 100.C. x > 10.D. x >= 10.E. x != 10.
Answers
The code segment illustrates the use of while loops
Loops are program statements that are used for repetitive and iterative operations
The missing statement in the code is x>= 0
The code is meant to add numbers from 10 to 100 (inclusive) with an increment of 10.
At the beginning of the program, variable x is initialized to 100, and it is reduced by 10 in the iteration until it gets to 10
So, the condition must be set to stop when the value of x is 10 i.e. x >= 0
i.e. the iteration must be repeated while x is greater than or equal to 10
Hence, the missing statement is (d) x >= 0
Read more about loops at:
brainly.com/question/16397886
you have a remote user who can connect to the internet but not to the office via their vpn client. after determining the problem, which should be your next step?
Answers
Do you think social media has negative effects on teens? Explain why or why not.
Answers
Answer:
yes and no
Explanation:
yes because some teens get addicted to social media
no because some social media is good
Answer:
Yes, Made teens feel they're living in the complete opposite of the person who's posting fun moments and happy moments as if they're living wayy better than the teen watching leading the teen to feel depressed
Explanation:
ANY ADVICE?
i have to spend summer ( and the next 4 years) with a family who hates me. what should I do.
Answers
Answer:
Talk to a close friend or adult that you trust and have the power and explain to them why you don't want to go. Good luck.
Answer:
You should try talking to a person that could maybe help you or a family member that you trust who will let you stay with them for the summer and 4 years. If you don't have any one else I would try being nice, or just ignore them and live on with your life. I don't really know what else to say sense I don't know your life experience.
Explanation:
Write a pseudocode algorithm that ask a user to enter three numbers. The program should calculate and print their average
Answers
Answer:
BEGIN
INPUT first_number, second_number, third_number
average = (first_number + second_number + third number)/ 3
PRINT average
END
Explanation:
That is the simplest answer one can create
which type of internet connection allows for the fastest speeds?
Answers
The quickest type of internet available is fibre. Large volumes of data are transmitted via light signals using bundles of fiber-optic strands that are wrapped in a reflective casing.
The majority of fibre internet plans offer speeds of 1,000 Mbps, however other providers can bring you speeds as high as 2,000 Mbps or even 6,000 Mbps. Long, delicately woven glass strands with an average diameter of a human hair make up fibre optics, often known as optical fibres. These strands are bundled together to form fibre optic cables. They are essential to the long-distance transmission of light signals. There are two main categories of fibre, and each one has a unique application. These are single-mode (SM) fibre, which has only one passage through a much smaller core, and multimode (MM) fibre, which has many paths through a larger core. In a typical fibre cable, each of the 12 groups of strands is enclosed in a tiny tube that is one of the 12 colours.
Learn more about fiber-optic strands here
https://brainly.com/question/3182176
#SPJ4
what are some of the standard sql functions that can be used in the select clause?
Answers
SQL has a variety of built-in functions that can be used in the SELECT clause to manipulate and transform data. Some of the standard SQL functions that can be used in the SELECT clause include:
COUNT: used to count the number of rows in a result set.
SUM: used to calculate the sum of a numeric column in a result set.
AVG: used to calculate the average value of a numeric column in a result set.
MAX: used to find the maximum value in a result set.
MIN: used to find the minimum value in a result set.
CONCAT: used to concatenate two or more strings.
SUBSTR: used to extract a substring from a string.
UPPER: used to convert a string to uppercase.
LOWER: used to convert a string to lowercase.
ROUND: used to round a numeric value to a specified number of decimal places.
These are just a few examples of the many SQL functions available for use in the SELECT clause.
Learn more about SQL here:
https://brainly.com/question/13068613
#SPJ11
The line represents a visible line that represents features that can be seen
in the current view.
Continuous Thick Line
Pictorial Sketch Types
Aligned Section View
Chain Thin Line
Answers
The continuous thick line represents a sample that depicts features seen in the current view, which can be used to represent apparent contours and boundaries.
In this, the scribbled lines are used to generate contours and edges that are not visible from the outside.This line type is utilized in site plans for apparent outlines, general detailing, existing structures, and landscaping.Therefore, the answer is "continuous thick line".
Learn more about the line here:
brainly.com/question/26196994
As per the statement, the line represents the visible part of the features that can be seen in the current views as the line is a continuous thick line. Thus the option A is correct.
Which line represents a visible feature of current view.?The visible lines are those that make up most of the visible part of the features and are noted for the summary lines and refer to the specific views.
A continuous line can be easily seen and is visible for very far and hence this line is a sorrowing the side of the matter. It can be used to outline the object and is has a medium weight. Hence the visibility of the line is lone factor of the continuality and thickness.
Find out more information about the line represented.
brainly.com/question/12242745.
Can anyone please help me on these two questions it would really help xxx
Answers
Answer: No one can interpret or hack it.
Explanation:
Because there is nothing to hack.
take it from someone who hack their teachers laptop as a dare. It was so easy.
If a mistake is made on a project and needs to be fixed, the easiest way to find the mistake is to use the____ panel.
Answers
If a mistake is made on a project and needs to be fixed, the easiest way to find the mistake is to use the history panel.
What is the use of history panel?The History Panel is known to be a computer tool that is known to be used to make a chronological order of the top-down view of all that was done in course of a working session in Photoshop.
Note that the History panel often shows the way or the sequence of Photoshop states as it has been recorded in course of a Photoshop session and its aim is to let a person be able to handle and access the history records.
Hence, If a mistake is made on a project and needs to be fixed, the easiest way to find the mistake is to use the history panel.
Learn more about history from
https://brainly.com/question/21633419
#SPJ1
Clive wants to print the numbers 1 through 10, so he uses the following code.
for x in range(10):
print(x)
Why will he not get the output he wants?
1.Only the number 10 will print because he has only put 10 inside the parenthesis.
2.Python begins counting at 0, so the numbers 0 through 9 will print.
3.He will get a syntax error because he did not capitalize ‘For.’
4.Python begins counting at 0, so the numbers 0 through 10 will print
Answers
If Clive wants to print the numbers 1 through 10 with the code:
for x in range(10):
print (x)
He will not get the output he wants because python begins counting at 0, so the numbers 0 through 9 will print.
Code explanationThe code is represented in python.
We loop through the number in the range 10.Then print the the looped numbers.Generally, python begins counting from 0. Therefore, the numbers that will be printed are as follows:
0123456789learn more on python here: https://brainly.com/question/26104476?referrer=searchResults
Which of the following identifies how an astrophysicist is different from an astronomer?
An astrophysicist is more concerned with the laws that govern the origins of stars and galaxies.
An astrophysicist applies physics principles to better understand astronomy.
An astronomer is more concerned with the processes that lead to the creation of stars and galaxies.
An astronomer applies astronomy principles to better understand physics.
Answers
Answer: An astrophysicist is more concerned with the laws that govern the origins of stars and galaxies.
Explanation:
Astrophysicists like Raj Koothrappali in the Big Bang Theory differ from astronomers in that they study the general universe to find out the laws that govern it as well as how it originated and evolved.
Astronomers on the other hand is more specific in their study of the universe and so you will find them focusing on certain planets or galaxies.
Which particular ISO/IEC 27000 series standard provides a detailed view of a broad set of security controls and control objectives which could potentially be applied within an organization? O ISO/IEC 27001 O ISO/IEC 27002 O ISO/IEC 27005 O ISO/IEC 27000
Answers
At a Glance: ISO 27000 Moreover, ISO 27000 provides an overview of an Information Security Management System (ISMS), identifying and outlining the logically ordered set of procedures that help enterprises align their information security with their business goals and objectives.
Given that there are thousands of security threats to your information systems every day, information security risk management is unavoidable. Organizations must maintain a close watch on all known and undiscovered dangers in order to protect themselves from potential financial and reputational harm brought on by cyber-attacks. Just because you haven't been attacked before doesn't imply you can't or won't be a victim in the future. Through increasing understanding of information security, ISO 27000 can provide comfort.
Learn more about objectives here:
https://brainly.com/question/11929974
#SPJ4
Take one action in the next two days to build your network. You can join a club, talk to new people, or serve someone. Write about this action and submit this as your work for the lesson. icon Assignment
Answers
Making connections is crucial since it increases your versatility.You have a support system of people you can turn to when things get tough so they can help you find solutions or in any other way.
What are the advantages of joining a new club?
Support Network - Joining a club or organization can help you develop a support network in addition to helping you make new acquaintances and meet people.Your teammates and friends will be there for you not only during practice but also amid personal difficulties. Working collaboratively inside a group, between groups, between communities, or between villages is known as network building.One method of creating a network is by forming a group. Attending events and conferences and developing connections with other attendees and industry speakers is one of the finest methods to build a strong network.In fact, the framework of many networking events and conferences encourages networking and connection opportunities. Personal networking is the process of establishing connections with organizations or individuals that share our interests.Relationship growth often takes place at one of the three levels listed below:Networks for professionals.Neighborhood networks.Personal networks. Reaching out is part of an active communication process that will help you learn more about the other person's interests, needs, viewpoints, and contacts.It is a life skill that needs to be actively handled in order to preserve or, more importantly, to advance a prosperous profession. various network types.PAN (personal area network), LAN (local area network), MAN (metropolitan area network), and WAN (wide area network) are the different types of networks.To learn more about network refer
https://brainly.com/question/28041042
#SPJ1
14. A film's rated speed is a measure of its ____ to light.
Answers
A film's rated speed, also known as ISO or ASA, is a measure of its sensitivity to light.
What is a Film's Rated Speed?The sensitivity of a film to light can be measured by its rated speed, which is also referred to as ISO or ASA. It is a standardized system used to determine how much light is required to produce a usable image on the film.
A higher ISO or ASA rating means the film is more sensitive to light and will require less light to produce a well-exposed image. This can be useful in low-light situations or when using fast shutter speeds.
However, a higher rating can also result in more visible grain or noise in the final image, so photographers must balance their need for sensitivity with the desired quality of the final image.
Learn more about rated speed of films on:
https://brainly.com/question/30454862
#SPJ1
. The lightness or brightness of a color is the _______.
Answers
Answer: Value
Explanation:
Aaron keeps texting throughout his study session. Why should he minimize such distractions? Answers: 1. to recognize his priorities, 2. to avoid breaks, 3. to maintain his to-do list, 4. No or to stay focused. Can someone answer this in less than a hour.
Answers
Answer:
1
Explanation:
realize his priorites show him what was the wrong thing to do do so he realize he should focused on his study
He should stay focused to minimize such distractions. The correct option is D.
What is staying focused mean?To remain focused simply means to continue working on the current project.
To keep working toward whatever it is that you need to accomplish and to make sure that you maintain focus on that one task. Not multitasking at all.
A person is paying attention to something when they are focused on it. When a camera lens or your eyes are focused, the necessary corrections have been performed for clear vision. A beam of light is beaming on something when it is focused on it.
Aaron continues to text when he is studying. In order to reduce these distractions, he needs maintain focus.
Thus, the correct option is D.
For more details regarding staying focused, visit:
https://brainly.com/question/15633749
#SPJ6
solve each of the following a. 3x=27
Answers
Answer:
3^(x)=27 x=3
Explanation:
3x3x3 27
:)
3ˣ = 27
Factorise 27.
27 = 9 × 3
27 = 3 × 3 × 3
27 = 3³
So,
3ˣ = 27
=》ˣ = ³
3³ = 27
_____
Hope it helps ⚜
Here is a super challenge for you if you feel up for it. (You will need to work this out in Excel.) In 2017 the Islamic month of fasting, Ramadan, began on Friday, 26 May. What fraction of the year was this? (to 1 decimal place) Hint: Think carefully which start and end dates to use.
Answers
The date Friday 26, May 2017 represents 2/5 of the year 2017
From the question, we understand that Ramadan starts on Friday 26, May 2017.
Using Microsoft Office Excel, this date is the 146th day of the year in 2017.
Also, 2017 has 365 days.
This is so because 2017 is not a leap year.
So, the fraction of the year is:
\(\frac{146}{365}\)
Multiply the fraction by 73/73
\(\frac{146}{365} = \frac{146}{365} \times \frac{73}{73}\)
Simplify
\(\frac{146}{365} = \frac{2}{5}\)
Hence, the fraction of the year is 2/5
Read more about fractions and proportions at:
https://brainly.com/question/21602143
The fraction of the year that corresponds to the Islamic month of fasting, Ramadan, beginning on May 26, 2017, is 2/5.
Find out how many days passed from January 1, 2017, to May 26, 2017.
January has 31 daysFebruary has 28 daysMarch has 31 daysApril has 30 daysMay has 26 daysTotal days = 31 + 28 + 31 + 30 + 26
Total days = 146 days.
The total days in regular year:
The total days = 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31
The total days = 365 days.
The required fraction is calculated as:
Fraction = 146 days / 365 days
Fraction = 2 / 5
So, the fraction is 2 / 5.
Learn more about Fraction here:
https://brainly.com/question/10708469
#SPJ3
Check the devices that are external peripheral devices:
Answers
Answer:
Mouse, and keyboard
Explanation:
Common Sense
Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.
Which number represents the "on* state of a computer?
_ represents the "on" state of a computer.
Answers
Binary values are used to denote the 'ON' and 'OFF' state of a computer. The 'ON' state is denoted by the binary value '1'
The 'ON' state of a computer represents the mode when the computer system is running and can be used to perform computing operations. The binary values '0' and '1' are used to designate the ON and OFF state. When the computer is ON, it is designated by the binary value 1 ; while the OFF state is designated by the binary value 0.Therefore, the number which signifies the ON state of a computer is 1.
Learn more :https://brainly.com/question/4722254
which type of attack is wep extremely vulnerable to?
Answers
WEP is extremely vulnerable to a variety of attack types, including cracking, brute-force, IV (Initialization Vector) attack, and replay attack.
What is Initialization Vector?An Initialization Vector (IV) is a random number used in cryptography that helps to ensure the uniqueness and randomness of data used in an encryption process. The IV is typically used as part of an encryption algorithm, where it is combined with a secret key to encrypt a message. The IV is unique for each encryption session, and must be unpredictable and non-repeating. A good IV should not be reused across multiple encryption sessions, and it should be kept secret from anyone who does not have access to the decryption key. Without a good IV, a cryptographic system can be vulnerable to attacks such as replay attacks, where an attacker can gain access to the system by repeating an encrypted message.
To learn more about Initialization Vector
https://brainly.com/question/27737295
#SPJ4
Which of the following is an example of artificial intelligent agent/agents? a) Autonomous Spacecraft b) Human c) Robot d) All of the mentioned.
Answers
People could be categorized as agents. Sensors include things like the eyes, ears, skin, taste buds, and so on in contrast to effectors, which include the hands, fingers, legs, and mouth. Machines make up agents.
What is an artificial intelligence agent ?Artificial sweetening agents are substances that add sweetness to food. Our bodies do not gain calories from them. They have no negative effects on our physical health. Aspartame, sucrose, sucralose, and alitame are a few examples.Using sensors and actuators, an AI agent detects its surroundings and takes appropriate action. It senses its surroundings via sensors and responds to them with actuators. Simple reflex agent, model-based reflex agent, reflex agent with goals, reflex agent with utility, and learning agent.
The Hong Kong-based company Hanson Robotics created Sophia, a social humanoid robot. In mid-March 2016 during South by Southwest (SXSW) in Austin, Texas, the United States, Sophia made its first public appearance after being activated on February 14. George Devol created the first digitally controlled and programmable robot in 1954, which he named the Unimate. The contemporary robotics industry was later built on the foundations laid by this.
To learn more about artificial intelligent refer to :
https://brainly.com/question/20339012
#SPJ4
Which statement describes lossless compression?
OA. It is a method that converts temporary files into permanent files
for greater storage capacity.
B. It is a technique that accesses memory addresses to retrieve data.
C. It is a method that results in the loss of all the original data in a
file.
D. It is a technique that allows all of a file's data to be restored from
compressed data.
its d
Answers
D. It is a technique that allows all of a file's data to be restored from
compressed data. Lossless compression shrinks the image without sacrificing any crucial information.
More about lossless compressionA type of data compression known as lossless compression enables flawless reconstruction of the original data from the compressed data with no information loss. Since most real-world data exhibits statistical redundancy, lossless compression is feasible.
By utilizing a sort of internal shorthand to denote redundant material, lossless compression "packs" data into a smaller file size. Depending on the type of information being compressed, lossless compression can reduce an initial file that is 1.5 MB to roughly half that size.
Learn more about lossless compression here:
https://brainly.com/question/17266589
#SPJ1
Which of the following BEST describes a front-end developer?
Answers
Answer:
plz give me BRAINLIEST answer
Explanation:
Definition: Front end development manages everything that users visually see first in their browser or application. Front end developers are responsible for the look and feel of a site. ... As a front end developer you are responsible for the look, feel and ultimately design of the site.
A front-end developer is a type of software developer who specializes in creating the user interface (UI) and user experience (UX) of a website or application. They are responsible for translating design mock-ups and wireframes into functional code using programming languages such as HTML, CSS, and JavaScript.
Front-end developers work on the client-side of web development, focusing on the visual aspects and interactions that users see and experience directly. They ensure that the website or application is visually appealing, responsive, and user-friendly across different devices and browsers.
In addition to coding, front-end developers collaborate closely with designers and back-end developers to integrate the UI with the back-end systems and databases. They may also be involved in optimizing the performance and accessibility of the front-end code, as well as testing and debugging to ensure smooth functionality.
Learn more about databases on:
https://brainly.com/question/30163202
#SPJ6
Information that is sent across a network is divided into chunks called __________.
Answers
Answer:
Packets
Explanation: