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@@ -4,31 +4,48 @@ Profile a single program giving stats for CPU, memory and other things (see man 2 getrusage). The standard input is closed for the child process, so programs like `cat` or `xargs` can't be profiled (for now). -## Example +The following list is the data that this software can tell you (on Linux +systems). The second list is all the features that are unmaintained for linux, +maybe on other systems it could be useful. + +* user CPU time used +* system CPU time used +* maximum resident set size +* page reclaims (soft page faults) +* page faults (hard page faults) +* block input operations +* block output operations +* voluntary context switches +* involuntary context switches + +### Unmaintained fields - > ./profile echo hello world - user CPU time used: 0 3333 - system CPU time used: 0 0 - residet set size used: 2336 +* integral shared memory size +* integral unshared data size +* integral unshared stack size +* swaps +* IPC messages sent +* IPC messages received +* signals received ## TODO -* [x] user CPU time used -* [x] system CPU time used -* [x] maximum resident set size -* [ ] integral shared memory size -* [ ] integral unshared data size -* [ ] integral unshared stack size -* [ ] page reclaims (soft page faults) -* [ ] page faults (hard page faults) -* [ ] swaps -* [ ] block input operations -* [ ] block output operations -* [ ] IPC messages sent -* [ ] IPC messages received -* [ ] signals received -* [ ] voluntary context switches -* [ ] involuntary context switches +* Express the CPU time on CPU cycles. +* Check if there are another function/library that could tell us more info about + a child process. + +## Example + + > ./profile thunar + user CPU time used: 0s 206666us + system CPU time used: 0s 49999us + residet set size used: 35864 + page reclaims (soft page faults): 3979 + page faults (hard page faults): 0 + block input operations: 0 + block output operations: 16 + voluntary context switches: 343 + involuntary context switches: 26 ## Copyright |