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Steven Rostedt 778c55d44e ring-buffer: record page entries in buffer page descriptor 
Currently, when the ring buffer writer overflows the buffer and must
write over non consumed data, we increment the overrun counter by
reading the entries on the page we are about to overwrite. This reads
the entries one by one.

This is not very effecient. This patch adds another entry counter
into each buffer page descriptor that keeps track of the number of
entries on the page. Now on overwrite, the overrun counter simply
needs to add the number of entries that is on the page it is about
to overwrite.

[ Impact: speed up of ring buffer in overwrite mode ]

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
 		2009-05-05 14:28:08 -04:00
..
Kconfig tracing: rename EVENT_TRACER config to ENABLE_EVENT_TRACING 2009-04-20 17:55:35 +02:00
Makefile tracing/events: move the ftrace event tracing code to core 2009-04-14 12:57:59 -04:00
blktrace.c blktrace: fix context-info when mixed-using blk tracer and trace events 2009-04-16 10:11:01 +02:00
ftrace.c ftrace: use module notifier for function tracer 2009-04-17 16:59:15 +02:00
kmemtrace.c tracing/filters: use ring_buffer_discard_commit() in filter_check_discard() 2009-04-14 00:00:56 +02:00
ring_buffer.c ring-buffer: record page entries in buffer page descriptor 2009-05-05 14:28:08 -04:00
trace.c tracing: export stats of ring buffers to userspace 2009-05-05 13:52:02 -04:00
trace.h tracing/filters: a better event parser 2009-04-29 14:06:11 +02:00
trace_boot.c tracing: use macros to denote usec and nsec per second 2009-04-07 14:43:06 +02:00
trace_branch.c tracing/filters: use ring_buffer_discard_commit() in filter_check_discard() 2009-04-14 00:00:56 +02:00
trace_clock.c tracing: fix four sparse warnings 2009-03-22 18:16:54 +01:00
trace_event_profile.c tracing/events: convert event call sites to use a link list 2009-04-14 12:58:00 -04:00
trace_event_types.h tracing/filters: distinguish between signed and unsigned fields 2009-04-29 14:06:03 +02:00
trace_events.c tracing/filters: a better event parser 2009-04-29 14:06:11 +02:00
trace_events_filter.c tracing/filters: a better event parser 2009-04-29 14:06:11 +02:00
trace_export.c tracing/filters: distinguish between signed and unsigned fields 2009-04-29 14:06:03 +02:00
trace_functions.c tracing/core: use appropriate waiting on trace_pipe 2009-02-18 01:40:20 +01:00
trace_functions_graph.c function-graph: add option to calculate graph time or not 2009-03-24 23:41:11 -04:00
trace_hw_branches.c tracing/filters: use ring_buffer_discard_commit() in filter_check_discard() 2009-04-14 00:00:56 +02:00
trace_irqsoff.c tracing: have latency tracers set the latency format 2009-03-04 22:15:30 -05:00
trace_mmiotrace.c tracing: use macros to denote usec and nsec per second 2009-04-07 14:43:06 +02:00
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/events: reuse trace event ids after overflow 2009-04-24 23:06:00 -04:00
trace_output.h tracing/events: move declarations from trace directory to core include 2009-04-14 12:57:58 -04:00
trace_power.c tracing/filters: use ring_buffer_discard_commit() in filter_check_discard() 2009-04-14 00:00:56 +02:00
trace_printk.c tracing/ftrace: factorize the tracing files creation 2009-04-07 14:43:07 +02:00
trace_sched_switch.c tracing/events: move trace point headers into include/trace/events 2009-04-14 22:05:43 -04:00
trace_sched_wakeup.c tracing/wakeup: move access to wakeup_cpu into spinlock 2009-04-23 23:01:36 -04:00
trace_selftest.c tracing: keep the tracing buffer after self-test failure 2009-03-22 15:17:21 +01:00
trace_selftest_dynamic.c ftrace: fix dynamic ftrace selftest 2008-05-23 21:13:23 +02:00
trace_stack.c tracing/ftrace: factorize the tracing files creation 2009-04-07 14:43:07 +02:00
trace_stat.c Merge branch 'linus' into tracing/core 2009-04-07 13:47:45 +02:00
trace_stat.h tracing: add handler to trace_stat 2009-03-24 23:22:58 -04:00
trace_syscalls.c tracing/syscalls: use a dedicated file header 2009-04-09 05:43:32 +02:00
trace_sysprof.c tracing/ftrace: factorize the tracing files creation 2009-04-07 14:43:07 +02:00
trace_workqueue.c Merge branch 'linus' into tracing/core 2009-04-07 13:47:45 +02:00