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b5b8731219
This patch attempts to make the perf trace command-line for live-mode commands more user-friendly and consistent with other perf commands. The main change it makes is to allow <commands> to be run as part of perf trace live-mode commands, as other perf commands do, instead of the system-wide traces they're currently hard-coded to by the shell scripts. With this patch, the following live-mode trace now works as expected: $ perf trace rw-by-pid ls -al The previous system-wide behavior for this command would still be available by explicitly specifying -a: $ perf trace rw-by-pid -a ls -al and if no <command> is specified, the output is also system-wide: $ perf trace rw-by-pid Because live-mode requires both record and report steps to be invoked, it isn't always possible to know which args to send to the report and which to send to the record steps - mainly this is the case for report scripts with optional args - in those cases it would be necessary to use separate 'perf trace record' and 'perf trace report' steps. For example: $ perf trace syscall-counts ls Here we can't decide whether ls should be passed as a param to the syscall-counts script or whether we should invoke ls as a <command>. In these cases, we just say that we'll ignore optional script params and always interpret the extra arguments as a <command>. If the user instead wants the other interpretation, that can be accomplished by using separate record and report commands explicitly: $ perf trace record syscall-counts $ perf trace report syscall-counts ls So the rules that this patch implements, which seem to make the most intuitive sense for live-mode commands: - for commands with optional args and commands with no args, no args are sent to the report script, all are sent to the record step - for 'top' commands i.e. that end with 'top', <commands> can't be used - all extra args are send to the report script as params - for commands with required args, the n required args are taken to be the first n args after the script name and sent to the report script, and the rest are sent to the record step Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Acked-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> |
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| .. | ||
| arch | ||
| bench | ||
| Documentation | ||
| scripts | ||
| util | ||
| .gitignore | ||
| builtin-annotate.c | ||
| builtin-bench.c | ||
| builtin-buildid-cache.c | ||
| builtin-buildid-list.c | ||
| builtin-diff.c | ||
| builtin-help.c | ||
| builtin-inject.c | ||
| builtin-kmem.c | ||
| builtin-kvm.c | ||
| builtin-list.c | ||
| builtin-lock.c | ||
| builtin-probe.c | ||
| builtin-record.c | ||
| builtin-report.c | ||
| builtin-sched.c | ||
| builtin-stat.c | ||
| builtin-test.c | ||
| builtin-timechart.c | ||
| builtin-top.c | ||
| builtin-trace.c | ||
| builtin.h | ||
| command-list.txt | ||
| CREDITS | ||
| design.txt | ||
| feature-tests.mak | ||
| Makefile | ||
| MANIFEST | ||
| perf-archive.sh | ||
| perf.c | ||
| perf.h | ||