cpu stress test

Preface: Modern CPUs all have pipelines and branch prediction functions. The accuracy of CPU branch prediction can reach more than 98%. However, if the prediction fails, the pipeline fails and the performance loss is very serious. For details about the branch prediction technology used by the CPU, refer: History and current example of research by processor branch Branch Same-time multi-thread Processors Us

Tags: end ORC step Installation tutorial proc IPY Post Network flagsThis is the second part of the Caffe Beginner series , designed to help more students who are interested in deep learning! The first section can refer to the following address:Caffe Beginner First: Detailed procedure for installing Caffe (CPU) +python on Ubuntu14.04 (pro-Test success, 20180524 update)OK, let's start our tutorial!Objective:B

first, high CPU test 　　1. Sample Code Static voidMain (string[] args) {console.clear (); Console.WriteLine ("to the command line, switch to the WinDbg directory, and execute ADPLUS-HANG-PN highcpu.exe-o c:\\dumps"); Console.WriteLine ("If you want to stop, press CTRL + C to end the program"); Console.WriteLine ("===================================================="); while(true) {console

I think many of my friends will find that their mysql occupies a large amount of internal and cpu resources. To solve this problem, most of us will directly reduce the number of mysql accesses and connections and directly generate static or cache files, below I have more ways to solve mysql's high CPU and memory usage. In order to install the mysql environment for testing, after installation, it is found th

I accidentally saw an article on the 51 homepage about "creating CPU load or pressure through command line". I thought it was good to record it first and make notes for future use!It is very simple, just a command:# Cat/dev/urandom | md5sumThen through top observation, the CPU value is really high, indicating that the test is successful!Graph and truth ^_^650) Th

Test and solution for high memory usage and high CPU usage of MySQL. The changes are as follows: Innodb_buffer_pool_size = 576 M-> 256 M InnoDB Engine Buffer occupies a large proportion, the first is to use it to open the knifeQuery_cache_size = 100 M-> 16 M query CacheTmp_table_size = 102 M-> 64 M temporary table sizeKey_buffer_size = 256 m-> 32 M After the mysql service is restarted, the virtual memory is

the setting. Default is 2402, Tune to 512-1024 best innodb_additional_mem_pool_size=8m defaults to 2M innodb_flush_log_at_trx_commit=0 wait until Innodb_log_buffer _size queue full and then unified storage, the default is 1 innodb_log_buffer_size=4m default to 1M Innodb_thread_concurrency=8 your server CPU several set to a few, the default is 8 key_buffer_size=256m defaults to 218 to 128 best tmp_table_size=64m to 64-256 for 16M read_buffer_si

)#perform the test process multiple times defRun (self): whileSelf.counter >0:self.testprocess () self.counter= Self.counter-1Time.sleep (3) #gets the current timestamp defGetCurrentTime (self): CurrentTime= Time.strftime ("%y-%m-%d%h:%m:%s", Time.localtime ())returncurrenttime#Storage of Data defsavedatatocsv (self): CSVFile= File ('Cpustatus.csv','WB') Writer=Csv.writer (csvfile) writer.writerows (self.alldata) csvfile.close ()if __name_

MySQL server CPU consumption is high1. Description of the problemA simple interface, according to the incoming number segment query number attribution, run Performance test script, 20 concurrent MySQL CPU is very high, monitoring found only a SELECT statement, and the table is indexed2. Cause of the problemQuery Statement index not hit causesSelect at the beginni

Calculation of the following series of mathematical calculations can be performed too few times in 1s.#include "stdio.h" #include "time.h" int i, J, L, K, m, jj;jj = 2342;k = 31455;l = 16452;m = 9823;i = 1000000;void Main () {I NT Warp_count = 0;int max_warp = 1000;long int count = 0;time_t b_second,l_second;time_t rawtime;struct TM * Timeinfo;whil E (1) {B_second = time (null); L_second = B_second+1;while ((b_second=time (null)) CPU Compute Performan

Symptom: A CPU for the Intel Celeron 2.0GHz of the computer, the previous one really used normally, the most recent post on the self-test when the frequency of the CPU turned to the L GHz, and "Defaults CMOS Setup Loaded" prompted information; After entering the CMOS set of CPU parameters, the system normally shows the