| Title: | DIGITAL UNIX (FORMERLY KNOWN AS DEC OSF/1) |
| Notice: | Welcome to the Digital UNIX Conference |
| Moderator: | SMURF::DENHAM |
| Created: | Thu Mar 16 1995 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 10068 |
| Total number of notes: | 35879 |
Hello, We exactly want to know how ps command gets these values. We are not heading nowhere with repsect to this issue. In the rusage structure there are three fields 1.) ru_ixrss 2.) ru_idrss 3.) ru_isrss which of these fields do we need to access inorder to get the value returned by ps -u rss.None of the above rss fields give the exact value that ps -u rss gives . Do we need to do some calculation for getting the value, if so please tell us. There is no field corresponding to virtual memory used .( ps -o vsz ) Thanks in Advance Pankaj Gupta
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 8846.1 | NETRIX::"[email protected]" | Shashi Mangalat | Tue Feb 18 1997 22:58 | 11 | |
ps does not use getrusage() to get either RSS or VSZ values. It uses the task_info() Mach IPC to get them. Mach interfaces are not supported and are used only in the base system. The getrusage() rss values are not the actual resident set size at the time of call. It is the "integral rss in KB/seconds" according to the source code. Whatever it is supposed to indicate, I don't think you can depend on it. --shashi [Posted by WWW Notes gateway] | |||||