Hi Don, 2014-04-23 (수), 08:58 -0400, Don Zickus: > On Wed, Apr 23, 2014 at 03:15:35PM +0900, Namhyung Kim wrote: > > On Tue, 22 Apr 2014 17:16:47 -0400, Don Zickus wrote: > > > ./perf mem record -a grep -r foo /* > /dev/null > > > ./perf mem report -F overhead,symbol_daddr,pid -s symbol_daddr,pid > > > --stdio > > > > > > I was thinking I could sort everything based on the symbol_daddr and pid. > > > Then re-sort the output to display the highest 'symbol_daddr,pid' pair. > > > But it didn't seem to work that way. Instead it seems like I get the > > > original sort just displayed in the -F format. > > > > Could you please show me the output of your example? > > > # To display the perf.data header info, please use --header/--header-only > # options. > # > # Samples: 96K of event 'cpu/mem-loads/pp' > # Total weight : 1102938 > # Sort order : symbol_daddr,pid > # > # Overhead Data Symbol Command: Pid > # ........ > ...................................................................... > # > 0.00% [k] 0xffff8807a8c1cf80 grep:116437 > 0.00% [k] 0xffff8807a8c8cee0 grep:116437 > 0.00% [k] 0xffff8807a8dceea0 grep:116437 > 0.01% [k] 0xffff8807a9298dc0 grep:116437 > 0.01% [k] 0xffff8807a934be40 grep:116437 > 0.00% [k] 0xffff8807a9416ec0 grep:116437 > 0.02% [k] 0xffff8807a9735700 grep:116437 > 0.00% [k] 0xffff8807a98e9460 grep:116437 > 0.02% [k] 0xffff8807a9afc890 grep:116437 > 0.00% [k] 0xffff8807aa64feb0 grep:116437 > 0.02% [k] 0xffff8807aa6b0030 grep:116437
Hmm.. it seems that it's exactly sorted by the data symbol addresses, so I don't see any problem here. What did you expect? If you want to see those symbol_daddr,pid pair to be sorted by overhead, you can use the one of -F or -s option only. IOW, "perf mem report -F overhead,symbol_daddr,pid" and "perf mem report -s symbol_daddr,pid" should show same result. FYI but "perf mem report -F overhead,symbol_daddr,pid -s symbol_addr,pid" will be different. It's due to a compatibility reason. If -s option is used without -F option, it'll prepend 'overhead' sort key to preserve old behavior (adds the fields to output but sort by overhead only). Thanks, Namhyung -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
