linux_dsm_epyc7002/kernel/trace
Steven Rostedt 553552ce17 tracing: Combine event filter_active and enable into single flags field
The filter_active and enable both use an int (4 bytes each) to
set a single flag. We can save 4 bytes per event by combining the
two into a single integer.

   text	   data	    bss	    dec	    hex	filename
4913961	1088356	 861512	6863829	 68bbd5	vmlinux.orig
4894944	1018052	 861512	6774508	 675eec	vmlinux.id
4894871	1012292	 861512	6768675	 674823	vmlinux.flags

This gives us another 5K in savings.

The modification of both the enable and filter fields are done
under the event_mutex, so it is still safe to combine the two.

Note: Although Mathieu gave his Acked-by, he would like it documented
 that the reads of flags are not protected by the mutex. The way the
 code works, these reads will not break anything, but will have a
 residual effect. Since this behavior is the same even before this
 patch, describing this situation is left to another patch, as this
 patch does not change the behavior, but just brought it to Mathieu's
 attention.

v2: Updated the event trace self test to for this change.

Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: Masami Hiramatsu <mhiramat@redhat.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-05-14 14:33:22 -04:00
..
blktrace.c tracing: Allow events to share their print functions 2010-05-14 14:20:32 -04:00
ftrace.c tracing: Let tracepoints have data passed to tracepoint callbacks 2010-05-14 09:50:34 -04:00
Kconfig Merge branch 'tracing/core' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into tracing/core 2010-02-27 10:06:10 +01:00
kmemtrace.c tracing: Allow events to share their print functions 2010-05-14 14:20:32 -04:00
Makefile perf: Drop the obsolete profile naming for trace events 2010-03-10 14:47:18 +01:00
power-traces.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ring_buffer_benchmark.c ring-buffer: Make benchmark handle missed events 2010-04-27 13:26:58 -04:00
ring_buffer.c ring-buffer: Wrap open-coded WARN_ONCE 2010-05-04 12:23:47 -04:00
trace_boot.c tracing: add filter event logic to special, mmiotrace and boot tracers 2009-09-12 23:34:04 -04:00
trace_branch.c tracing: Allow events to share their print functions 2010-05-14 14:20:32 -04:00
trace_clock.c tracing: Fix lockdep warning in global_clock() 2010-03-29 15:16:44 -04:00
trace_entries.h hw-breakpoints: Rewrite the hw-breakpoints layer on top of perf events 2009-11-08 15:34:42 +01:00
trace_event_perf.c tracing: Remove duplicate id information in event structure 2010-05-14 14:33:15 -04:00
trace_events_filter.c tracing: Combine event filter_active and enable into single flags field 2010-05-14 14:33:22 -04:00
trace_events.c tracing: Combine event filter_active and enable into single flags field 2010-05-14 14:33:22 -04:00
trace_export.c tracing: Remove duplicate id information in event structure 2010-05-14 14:33:15 -04:00
trace_functions_graph.c tracing: Allow events to share their print functions 2010-05-14 14:20:32 -04:00
trace_functions.c tracing: switch function prints from %pf to %ps 2009-09-17 15:53:40 -04:00
trace_hw_branches.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2009-12-14 09:58:24 -08:00
trace_irqsoff.c tracing: Add graph output support for irqsoff tracer 2010-04-27 12:36:53 -04:00
trace_kprobe.c tracing: Combine event filter_active and enable into single flags field 2010-05-14 14:33:22 -04:00
trace_ksym.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
trace_mmiotrace.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
trace_nop.c tracing/ftrace: make nop-tracer use polling wait for events on pipe 2009-03-23 09:22:15 +01:00
trace_output.c tracing: Allow events to share their print functions 2010-05-14 14:20:32 -04:00
trace_output.h tracing: Allow events to share their print functions 2010-05-14 14:20:32 -04:00
trace_printk.c tracing: Remove markers 2009-09-18 21:22:08 +02:00
trace_sched_switch.c tracing: Let tracepoints have data passed to tracepoint callbacks 2010-05-14 09:50:34 -04:00
trace_sched_wakeup.c tracing: Let tracepoints have data passed to tracepoint callbacks 2010-05-14 09:50:34 -04:00
trace_selftest_dynamic.c ftrace: fix dynamic ftrace selftest 2008-05-23 21:13:23 +02:00
trace_selftest.c tracing: Dump either the oops's cpu source or all cpus buffers 2010-04-21 23:11:42 +02:00
trace_stack.c tracing: Fix circular dead lock in stack trace 2010-02-02 10:20:18 -05:00
trace_stat.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
trace_stat.h tracing/stat: Add stat_release() callback 2009-07-10 12:14:05 +02:00
trace_syscalls.c tracing: Remove duplicate id information in event structure 2010-05-14 14:33:15 -04:00
trace_sysprof.c perf events, x86/stacktrace: Make stack walking optional 2009-12-17 09:56:19 +01:00
trace_workqueue.c tracing: Let tracepoints have data passed to tracepoint callbacks 2010-05-14 09:50:34 -04:00
trace.c tracing: Allow events to share their print functions 2010-05-14 14:20:32 -04:00
trace.h tracing: Combine event filter_active and enable into single flags field 2010-05-14 14:33:22 -04:00