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Tom Zanussi 794e43b56c perf/live-mode: Handle payload-less events 
Some events, such as the PERF_RECORD_FINISHED_ROUND event consist of
only an event header and no data.  In this case, a 0-length payload
will be read, and the 0 return value will be wrongly interpreted as an
'unexpected end of event stream'.

This patch allows for proper handling of data-less events by skipping
0-length reads.

Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
LKML-Reference: <1273038527.6383.51.camel@tropicana>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-05-09 13:49:52 +02:00
..
include
perf tools: Don't use code surrounded by __KERNEL__
2010-05-02 12:00:44 -03:00
scripting-engines
perf/scripts: Tuple was set from long in both branches in python_process_event()
2010-04-02 21:32:16 +02:00
abspath.c
perf: Enable more compiler warnings
2009-08-16 10:47:47 +02:00
alias.c
perf_counter tools: Add more warnings and fix/annotate them
2009-07-01 12:49:48 +02:00
bitmap.c
perf tools: Don't use code surrounded by __KERNEL__
2010-05-02 12:00:44 -03:00
build-id.c
perf: 'perf kvm' tool for monitoring guest performance from host
2010-04-19 12:37:24 +03:00
build-id.h
perf build-id: Move the routine to find DSOs with hits to the lib
2010-02-04 09:33:26 +01:00
cache.h
perf newt: Properly restore the screen when error exiting
2010-03-22 18:47:34 +01:00
callchain.c
perf callchains: Store the map together with the symbol
2010-03-26 08:52:57 +01:00
callchain.h
perf callchains: Store the map together with the symbol
2010-03-26 08:52:57 +01:00
color.c
perf hist: Replace ->print() routines by ->snprintf() equivalents
2010-04-02 16:28:15 -03:00
color.h
perf hist: Replace ->print() routines by ->snprintf() equivalents
2010-04-02 16:28:15 -03:00
config.c
perf: Enable more compiler warnings
2009-08-16 10:47:47 +02:00
cpumap.c
perf tools: Fix sparse CPU numbering related bugs
2010-03-11 13:36:53 +01:00
cpumap.h
perf tools: Fix sparse CPU numbering related bugs
2010-03-11 13:36:53 +01:00
ctype.c
perf tools: Move graph_line and graph_dotted_line from top
2009-11-23 21:55:20 +01:00
debug.c
perf: Fix endianness argument compatibility with OPT_BOOLEAN() and introduce OPT_INCR()
2010-04-14 11:26:44 +02:00
debug.h
perf: Fix endianness argument compatibility with OPT_BOOLEAN() and introduce OPT_INCR()
2010-04-14 11:26:44 +02:00
debugfs.c
perf trace: Clean up find_debugfs()
2009-12-28 10:36:36 +01:00
debugfs.h
perf tools: Mount debugfs automatically
2009-12-28 10:36:36 +01:00
environment.c
perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/
2009-06-06 20:33:43 +02:00
event.c
perf report: Make dso__calc_col_width agree with hist_entry__dso_snprintf
2010-05-05 09:49:48 -03:00
event.h
perf: Introduce a new "round of buffers read" pseudo event
2010-05-09 13:43:42 +02:00
exec_cmd.c
perf: Enable more compiler warnings
2009-08-16 10:47:47 +02:00
exec_cmd.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
generate-cmdlist.sh
perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/
2009-06-06 20:33:43 +02:00
header.c
perf: Fix performance issue with perf report
2010-05-04 10:54:09 -03:00
header.h
perf/live: don't synthesize build ids at the end of a live mode trace
2010-05-02 12:04:05 -03:00
help.c
perf_counter tools: Add more warnings and fix/annotate them
2009-07-01 12:49:48 +02:00
help.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
hist.c
perf: 'perf kvm' tool for monitoring guest performance from host
2010-04-19 12:37:24 +03:00
hist.h
perf: 'perf kvm' tool for monitoring guest performance from host
2010-04-19 12:37:24 +03:00
hweight.c
perf tools: Don't use code surrounded by __KERNEL__
2010-05-02 12:00:44 -03:00
levenshtein.c
perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/
2009-06-06 20:33:43 +02:00
levenshtein.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
map.c
perf machine: Adopt some map_groups functions
2010-04-27 21:21:18 -03:00
map.h
perf symbols: Add machine helper routines
2010-04-29 15:25:23 -03:00
newt.c
perf TUI: Move "Yes" button to before "No"
2010-04-08 11:34:25 -03:00
pager.c
perf_counter tools: Remove dead code
2009-06-27 06:06:39 +02:00
parse-events.c
Merge branch 'perf' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux-2.6 into perf/core
2010-05-08 10:02:57 +02:00
parse-events.h
perf: record TRACE_INFO only if using tracepoints and SAMPLE_RAW
2010-05-03 10:31:48 -03:00
parse-options.c
perf: Fix endianness argument compatibility with OPT_BOOLEAN() and introduce OPT_INCR()
2010-04-14 11:26:44 +02:00
parse-options.h
perf: Fix endianness argument compatibility with OPT_BOOLEAN() and introduce OPT_INCR()
2010-04-14 11:26:44 +02:00
path.c
perf: Enable more compiler warnings
2009-08-16 10:47:47 +02:00
PERF-VERSION-GEN
perf tools: Allow specifying O= to build files in a separate directory
2010-04-02 16:28:03 -03:00
probe-event.c
perf machine: Adopt some map_groups functions
2010-04-27 21:21:18 -03:00
probe-event.h
perf probe: Add --max-probes option
2010-04-26 15:35:20 -03:00
probe-finder.c
perf probe: Add --max-probes option
2010-04-26 15:35:20 -03:00
probe-finder.h
perf probe: Add --max-probes option
2010-04-26 15:35:20 -03:00
quote.c
perf: Fix read buffer overflow
2009-08-04 11:09:56 +02:00
quote.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
run-command.c
perf: Enable more compiler warnings
2009-08-16 10:47:47 +02:00
run-command.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
session.c
perf/live-mode: Handle payload-less events
2010-05-09 13:49:52 +02:00
session.h
perf: Provide a new deterministic events reordering algorithm
2010-05-09 13:43:42 +02:00
sigchain.c
perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/
2009-06-06 20:33:43 +02:00
sigchain.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
sort.c
perf tools: Fix accidentally preprocessed snprintf callback
2010-04-14 16:59:21 -03:00
sort.h
perf: 'perf kvm' tool for monitoring guest performance from host
2010-04-19 12:37:24 +03:00
strbuf.c
perf_counter tools: Add more warnings and fix/annotate them
2009-07-01 12:49:48 +02:00
strbuf.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
string.c
perf: Swap inclusion order of util.h and string.h in util/string.c
2010-04-04 16:40:42 +02:00
strlist.c
perf probe: Fix --del to update current event list
2009-12-15 20:22:01 +01:00
strlist.h
perf tools: Add for_each macros for strlist
2009-12-15 20:22:02 +01:00
svghelper.c
perf timechart: Improve the visual appearance of scheduler delays
2009-10-20 03:39:21 +02:00
svghelper.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
symbol.c
perf symbols: Add machine helper routines
2010-04-29 15:25:23 -03:00
symbol.h
perf symbols: Add machine helper routines
2010-04-29 15:25:23 -03:00
thread.c
perf symbols: Move more map_groups methods to map.c
2010-04-02 16:27:39 -03:00
thread.h
perf: 'perf kvm' tool for monitoring guest performance from host
2010-04-19 12:37:24 +03:00
trace-event-info.c
perf/record: simplify TRACE_INFO tracepoint check
2010-05-05 11:12:53 -03:00
trace-event-parse.c
perf: Fix warning while reading ring buffer headers
2010-05-01 04:31:48 +02:00
trace-event-read.c
Merge branch 'perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/core
2010-05-03 08:29:35 +02:00
trace-event-scripting.c
perf/scripts: Add Python scripting engine
2010-02-25 04:07:29 +01:00
trace-event.h
Merge branch 'perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/core
2010-05-03 08:29:35 +02:00
types.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
usage.c
perf top: Fall back to cpu-clock-tick hrtimer sampling if no cycle counter available
2009-06-07 17:31:52 +02:00
util.c
perf: Fix implicit declaration of getline in util.c
2010-01-17 07:53:09 +01:00
util.h
perf tools: Move the prototypes in util/string.h to util.h
2010-04-03 10:19:26 -03:00
values.c
perf: Fix memory leak: counterwidth
2010-01-13 10:09:15 +01:00
values.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
wrapper.c
perf tools: Remove unused wrapper routines
2009-11-24 16:37:03 +01:00