elapsedtime

问题 I'm doing a article about GPU speed up in cluster environment To do that, I'm programming in CUDA, that is basically a c++ extension. But, as I'm a c# developer I don't know the particularities of c++. There is some concern about logging elapsed time? Some suggestion or blog to read. My initial idea is make a big loop and run the program several times. 50 ~ 100, and log every elapsed time to after make some graphics of velocity. 回答1: Standard functions such as time often have a very low

问题 When I assess my program, I saw that at some point I get up to 100msec time lapse. I have searched every operation, but individually no operation was taking this time. Then I have noticed that wherever I do place cudaThreadSynchronize call, the first call takes 100 msec. Then I have written such an example below. When cudaThreadSynchronize is called at the first line, the elapsed time value at the end is found less than 1 msec. But if it is not called then it takes 110msec on average. int

问题 I have a SQL Server table that has a "Time" column. The table is a log table the houses status messages and timestamps for each message. The log table is inserted into via a batch file. There is an ID column that groups rows together. Each time the batch file runs it initializes the ID and writes records. What I need to do is get the elapsed time from the first record in an ID set to the last record of the same ID set. I started toying with select Max(Time) - Min(Time) from logTable where id

问题 Say we have a call-back timer function call_time(obj, event). I want to know the elapsed time (delt_time) during the execution of timer function once it is started. Furthermore, I want to use that elapsed time to decide if the function will be continued executing or be terminated (say delt_time > 60s). I want the timer function to determine the running time concurrently. By doing this way, the code knows when to terminate the program once it reaches to the threshold. Actually, I have asked a

问题 I’m working on a radar project using USRP N210 with UBX-40 daughterboard using MATLAB. I am facing a problem when I run the code for receiving the echo of the transmitted pulse. It is taking 4 seconds for the board to start receiving and collecting first sample, which doesn’t suit at all my case. After the first sample, receiving elapsed time for the other echoes is in milliseconds which not good because, echoes in radars should be received within microseconds or less and not seconds and

问题 I tried some codes by googling : clock_t start, end; start = clock(); //CODES GOES HERE end = clock(); std::cout << end - start <<"\n"; std::cout << (double) (end-start)/ CLOCKS_PER_SEC; but the result elapsed time always was 0, even with std::cout << (double) (end-start)/ (CLOCKS_PER_SEC/1000.0 ); Don't know why but when I get the similar in Java : getCurrentTimeMillis() it works well. I want it to show the milliseconds as maybe the computer compute so fast. 回答1: I don't think it's

问题 I have some big performance issues here So I would like to take some measurements on the gpu side. By reading this thread I wrote this code around my draw functions, including the gl error check and the swapBuffers() (auto swapping is indeed disabled) gl4.glBeginQuery(GL4.GL_TIME_ELAPSED, queryId[0]); { draw(gl4); checkGlError(gl4); glad.swapBuffers(); } gl4.glEndQuery(GL4.GL_TIME_ELAPSED); gl4.glGetQueryObjectiv(queryId[0], GL4.GL_QUERY_RESULT, frameGpuTime, 0); And since OpenGL rendering

问题 I have some big performance issues here So I would like to take some measurements on the gpu side. By reading this thread I wrote this code around my draw functions, including the gl error check and the swapBuffers() (auto swapping is indeed disabled) gl4.glBeginQuery(GL4.GL_TIME_ELAPSED, queryId[0]); { draw(gl4); checkGlError(gl4); glad.swapBuffers(); } gl4.glEndQuery(GL4.GL_TIME_ELAPSED); gl4.glGetQueryObjectiv(queryId[0], GL4.GL_QUERY_RESULT, frameGpuTime, 0); And since OpenGL rendering

问题 in Posting Before : I want to get response time on a simple math value if "button calculate" press, get sum value a and value b in textbox and also show how long to proceed that math calculation (response time) in textbox. BUT why my result always grow up / always up like in picture how to make result stable and less volatile ? the result when i click calculate button on a continuous picture coding button calculate Private Sub Button4_Click(sender As System.Object, e As System.EventArgs)

问题 I just tried to insert two rows with the current datetime and then calculated the elapsed time since that date. Here are the rows from my table after two insertions and using NOW() function to set the timestamp: mysql> select * from pendingActivations; +--------+------------+---------------------+ | userId | code | timestamp | +--------+------------+---------------------+ | 2 | aaa | 2010-08-23 17:04:02 | | 2345 | alkfjkla23 | 2010-08-23 16:59:53 | +--------+------------+---------------------