fork

问题 I have a set of python processes that share a large object (sharing is done by forking the processes after initializing the object) I notice a strange memory leak: the process memory (VSZ and RSS) hardly change the total system memory increases steadily My guess is the shared object does change (it's 'logically' readonly, but it's possible that some internal private variables change even when just reading from it) - which causes memory pages to be copied is there a way to verify this? 回答1: To

问题 I have a set of python processes that share a large object (sharing is done by forking the processes after initializing the object) I notice a strange memory leak: the process memory (VSZ and RSS) hardly change the total system memory increases steadily My guess is the shared object does change (it's 'logically' readonly, but it's possible that some internal private variables change even when just reading from it) - which causes memory pages to be copied is there a way to verify this? 回答1: To

问题 I have a set of python processes that share a large object (sharing is done by forking the processes after initializing the object) I notice a strange memory leak: the process memory (VSZ and RSS) hardly change the total system memory increases steadily My guess is the shared object does change (it's 'logically' readonly, but it's possible that some internal private variables change even when just reading from it) - which causes memory pages to be copied is there a way to verify this? 回答1: To

问题 I have a set of python processes that share a large object (sharing is done by forking the processes after initializing the object) I notice a strange memory leak: the process memory (VSZ and RSS) hardly change the total system memory increases steadily My guess is the shared object does change (it's 'logically' readonly, but it's possible that some internal private variables change even when just reading from it) - which causes memory pages to be copied is there a way to verify this? 回答1: To

问题 If i use wait(null) , and i know (for sure) that the child will finish (exit) before we reach to wait(null) in the parent process , does the wait(null) block the parent process ?? I mean , the wait() won't get any signal right ? int main() { int pipe_descs[2] ; int i, n, p ; srand(time(NULL( ; pipe(pipe_descs) ; for (i = 0; i < 2; i++) { pid_t status = fork() ; if (status == 0) { n = rand() % 100; p = (int) getpid() ; write(pipe_descs[1], &n, sizeof(int)) ; write(pipe_descs[1], &p, sizeof(int

问题 If i use wait(null) , and i know (for sure) that the child will finish (exit) before we reach to wait(null) in the parent process , does the wait(null) block the parent process ?? I mean , the wait() won't get any signal right ? int main() { int pipe_descs[2] ; int i, n, p ; srand(time(NULL( ; pipe(pipe_descs) ; for (i = 0; i < 2; i++) { pid_t status = fork() ; if (status == 0) { n = rand() % 100; p = (int) getpid() ; write(pipe_descs[1], &n, sizeof(int)) ; write(pipe_descs[1], &p, sizeof(int

问题 I'm still very new to coding and Github and as such am a little confused with how forking repos works - so please forgive what may be a basic question. I've been working on a project with different pair partners all week and my current code base situation is as follows: My initial repo - https://github.com/timrobertson0122/yelp_clone This code was then forked and work continue on a second repo - (can't post url) That repo was subsequently forked and contains the most recent code, that I

问题 I am using this tutorial from website http://www.code2learn.com/2011/01/signal-program-using-parent-child.html and trying to understand why signal is not recieved by child? here is the code: #include <stdio.h> #include <signal.h> #include <stdlib.h> void sighup(); /* routines child will call upon sigtrap */ void sigint(); void sigquit(); void main() { int pid; /* get child process */ if ((pid = fork()) < 0) { perror("fork"); exit(1); } if (pid == 0) { /* child */ signal(SIGHUP,sighup); /* set

来源： https://stackoverflow.com/questions/53932577/why-is-there-an-extra-percent-sign-after-the-output

来源： https://stackoverflow.com/questions/53932577/why-is-there-an-extra-percent-sign-after-the-output