cpu

What is the relationship between threads (in a Java or a C++ program) and number of cores in the CPU?

核能气质少年 提交于 2021-02-20 19:32:13
问题 Can someone shed some light on it? An i7 processor can run 8 threads but I am pretty sure we can create more than 8 threads in a JAVA or C++ program(not sure though). I have an i5 processor and while studying concurrency I have created 10 threads for assignments. I am just trying to understand how Core rating of CPU is related to threads. 回答1: The thread you are refering to is called a software thread ; and you can create as many software threads as you need, as long as your operating system

How does the communication between CPU happen?

六月ゝ 毕业季﹏ 提交于 2021-02-19 05:40:08
问题 Another question about L2/L3 caches explained that L3 can be used for inter process communication (IPC). Are there other methods/pathways for this communication to happen? The reason why it seems that there are other pathways is because Intel nearly halved the amount of L3 cache per core in their newest processor lineup (1.375 MiB per core in SKL-X) vs. previous generations (2.5 MiB per core in Broadwell EP). Per-core private L2 increased from 256k to 1M, though. 回答1: There are inter

Specify a special cpu for a thread in C#

自古美人都是妖i 提交于 2021-02-19 03:36:47
问题 I have 2 threads. I want to tell one of them to run on first cpu and the second one on the second cpu for example in a machine with two cpu. how can I do that? this is my code UCI UCIMain = new UCI(); Thread UCIThread = new Thread(new ThreadStart(UCIMain.main)); UCIThread.Priority = ThreadPriority.BelowNormal; UCIThread.Start(); and for sure the class UCI has a member function named main . I want to set this thread in 1st processor for example 回答1: I wouldn't recommend this, but if you really

Running Meteor Application on a Single Core

强颜欢笑 提交于 2021-02-18 18:56:21
问题 I am trying to run a meteor app on a remote host. The application works on my desktop, but when I run it on the remote host the meteor processes are either killed or they freeze. Here are a couple commands that are experiencing this issue: meteor meteor update meteor restart Each command is taking up about 99% of the cpu at the time of failure, so I suspect Ubuntu is killing the process. I believe that upgrading the CPU will fix these issues, but I want to get a second opinion before I buy

pytorch allocate memory for small size tensor on cpu and gpu but got error on a node with more than 400 GB

南笙酒味 提交于 2021-02-11 14:57:38
问题 I would like to build a torch.nn.embedding with tensors on databricks (the node is p2.8xlarge) by py3. My code: import numpy as np import torch from torch import nn num_embedding, num_dim = 14000, 300 embedding = nn.Embedding(num_embedding, num_dim) row, col = 800000, 302 t = [[x for x in range(col)] for _ in range(row)] t1 = torch.tensor(t) print(t1.shape) # torch.Size([800000, 302]) t1.dtype, t1.nelement() # torch.int64, 241600000 type(t1), t1.device, (t1.nelement() * t1.element_size())/

How to determine how much CPU load is produced from processes running under some user in Linux? [closed]

雨燕双飞 提交于 2021-02-08 05:15:42
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 9 years ago . Improve this question I would like to make a simple monitoring script that will record CPU load produced by user "abc" in a text file. vmstat, iostat, mpstat and free do not seem to have a capability to filter based on user name. Is it possible at all? EDIT : Btw. I'm running on Red Hat EL 6.0. 回答1: A simple way

How to determine how much CPU load is produced from processes running under some user in Linux? [closed]

左心房为你撑大大i 提交于 2021-02-08 05:14:43
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 9 years ago . Improve this question I would like to make a simple monitoring script that will record CPU load produced by user "abc" in a text file. vmstat, iostat, mpstat and free do not seem to have a capability to filter based on user name. Is it possible at all? EDIT : Btw. I'm running on Red Hat EL 6.0. 回答1: A simple way

What is the relationship between cpu.shares and cpu.cfs_quota_us in context of cgroup?

你。 提交于 2021-02-07 09:57:39
问题 I'm using centos6/7 and using cgroup to manage cpu resources. I have read through the RHEL document but have no answer to my question below: If I set both cfs_quota_us and shares among cgroups, then what will happen? (e.g. will cfs_quota_us take precedence over shares?) Thank you in anticipation! 回答1: My understanding is that for the same level of two cgroups (only), e.g.: foo | +- bar | +- baz Then bar and baz will firstly share the cpu occupied on foo according to cpu.share . Let's say the

Increasing C++ Program CPU Use

旧巷老猫 提交于 2021-02-07 08:00:43
问题 I have a program written in C++ that runs a number of for loops per second without using anything that would make it wait for any reason. It consistently uses 2-10% of the CPU. Is there any way to force it to use more of the CPU and do a greater number of calculations without making the program more complex? Additionally, I compile with C::B on a Windows computer. Essentially, I'm asking whether there is a way to make my program faster by increasing usage of CPU, and if so, how. 回答1: Assuming

Increasing C++ Program CPU Use

安稳与你 提交于 2021-02-07 07:58:32
问题 I have a program written in C++ that runs a number of for loops per second without using anything that would make it wait for any reason. It consistently uses 2-10% of the CPU. Is there any way to force it to use more of the CPU and do a greater number of calculations without making the program more complex? Additionally, I compile with C::B on a Windows computer. Essentially, I'm asking whether there is a way to make my program faster by increasing usage of CPU, and if so, how. 回答1: Assuming