Arnaldo Carvalho de Melo 218d61110f perf top: Do not use overwrite mode by default ... Enabling --overwrite mode allows us to to use just the most recent records, which helps in high core count machines such as Knights Landing/Mill, but right now is being disabled by default as the pausing used in this technique is leading to loss of metadata events such as PERF_RECORD_MMAP which makes 'perf top' unable to resolve samples, leading to lots of unknown samples appearing on the UI. Enabling this may be useful if you are in such machines and profiling a workload that doesn't creates short lived threads and/or doesn't uses many executable mmap operations. Work is being planed to solve this situation, till then, this will remain disabled by default. Reported-by: David Miller <davem@davemloft.net> Acked-by: Kan Liang <kan.liang@intel.com> Link: https://lkml.kernel.org/r/4f84468f-37d9-cf1b-12c1-514ef74b6a48@linux.intel.com Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Fixes: ebebbf0823 ("perf top: Switch default mode to overwrite mode") Link: https://lkml.kernel.org/n/tip-ehvf77vi1si9409r7p4wx788@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		2018-10-31 09:57:31 -03:00
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android.txt	perf tools: Update android build documentation	2016-07-04 20:27:27 -03:00
asciidoc.conf	perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/	2009-06-06 20:33:43 +02:00
asciidoctor-extensions.rb	perf Documentation: Support for asciidoctor	2018-04-26 13:47:10 -03:00
build-xed.txt	perf script: Add --insn-trace for instruction decoding	2018-10-24 15:29:50 -03:00
Build.txt	perf build: Add build documentation	2015-02-12 17:53:00 -03:00
callchain-overhead-calculation.txt	perf tools: Document --children option in more detail	2015-04-29 10:38:06 -03:00
examples.txt	perf record: Remove -f/--force option	2013-07-08 17:37:25 -03:00
intel-bts.txt	perf tools: Add Intel BTS support	2015-08-21 11:34:10 -03:00
intel-pt.txt	perf scripts python: call-graph-from-sql.py: Rename to exported-sql-viewer.py	2018-10-23 14:26:44 -03:00
itrace.txt	perf script: Make itrace script default to all calls	2018-10-24 15:29:54 -03:00
jit-interface.txt	perf symbols: Add description of JIT interface	2012-08-13 14:55:02 -03:00
jitdump-specification.txt	perf jit: Add jitdump format specification document	2016-10-24 11:07:41 -03:00
Makefile	perf Documentation: Fix out-of-tree asciidoctor man page generation	2018-09-18 10:17:16 -03:00
manpage-1.72.xsl	perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/	2009-06-06 20:33:43 +02:00
manpage-base.xsl	perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/	2009-06-06 20:33:43 +02:00
manpage-bold-literal.xsl	perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/	2009-06-06 20:33:43 +02:00
manpage-normal.xsl	perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/	2009-06-06 20:33:43 +02:00
manpage-suppress-sp.xsl	perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/	2009-06-06 20:33:43 +02:00
perf-annotate.txt	perf annotate: Add --percent-type option	2018-08-08 15:55:53 -03:00
perf-archive.txt	perf archive: Remove duplicated 'runs' in man page	2013-12-09 15:21:45 -03:00
perf-bench.txt	perf bench mem: Rename 'routine' to 'function'	2015-10-19 16:10:25 -03:00
perf-buildid-cache.txt	perf buildid-cache: Support --purge-all option	2018-04-26 09:30:26 -03:00
perf-buildid-list.txt	perf report: Accept fifos as input file	2011-12-23 17:01:03 -02:00
perf-c2c.txt	perf c2c record: Record physical addresses in samples	2018-03-16 13:52:57 -03:00
perf-config.txt	perf annotate: Allow setting the offset level in .perfconfig	2018-04-13 10:00:05 -03:00
perf-data.txt	perf tools: Correct title markers for asciidoctor	2018-03-07 10:26:32 -03:00
perf-diff.txt	perf diff: Add -q/--quiet option	2017-02-20 11:47:08 -03:00
perf-evlist.txt	perf evlist: Document missing --force option	2017-11-16 14:50:07 -03:00
perf-ftrace.txt	perf tools: Correct title markers for asciidoctor	2018-03-07 10:26:32 -03:00
perf-help.txt	perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/	2009-06-06 20:33:43 +02:00
perf-inject.txt	perf inject: Document missing options	2017-11-16 14:50:05 -03:00
perf-kallsyms.txt	perf tools: Correct title markers for asciidoctor	2018-03-07 10:26:32 -03:00
perf-kmem.txt	perf kmem: Document a missing option & an argument	2018-02-16 14:55:42 -03:00
perf-kvm.txt	perf tools: Configurable per thread proc map processing time out	2015-06-19 18:27:13 -03:00
perf-list.txt	perf list: Add missing documentation for --desc and --debug options	2018-07-24 14:49:57 -03:00
perf-lock.txt	perf lock: Document missing options	2017-11-16 14:50:04 -03:00
perf-mem.txt	perf mem: Document incorrect and missing options	2018-04-23 11:59:18 -03:00
perf-probe.txt	perf probe: Support escaped character in parser	2017-12-27 12:15:55 -03:00
perf-record.txt	perf, tools: Use correct articles in comments	2018-07-16 00:21:03 +02:00
perf-report.txt	perf report: Add --percent-type option	2018-08-08 15:55:54 -03:00
perf-sched.txt	perf sched: Fix documentation for timehist	2018-04-12 10:33:36 -03:00
perf-script-perl.txt	perf tools: Correct title markers for asciidoctor	2018-03-07 10:26:32 -03:00
perf-script-python.txt	perf script python: Add dict fields introduction to Documentation	2018-06-06 15:40:10 -03:00
perf-script.txt	perf script: Implement --graph-function	2018-10-24 15:29:55 -03:00
perf-stat.txt	perf stat: Add --interval-clear option	2018-06-07 15:53:36 -03:00
perf-test.txt	perf test: Add -F/--dont-fork option	2016-06-30 18:27:45 -03:00
perf-timechart.txt	perf timechart: Document missing --force option	2017-11-16 14:50:06 -03:00
perf-top.txt	perf top: Do not use overwrite mode by default	2018-10-31 09:57:31 -03:00
perf-trace.txt	perf trace: Introduce per-event maximum number of events property	2018-10-22 14:27:12 -03:00
perf-version.txt	perf version: Add man page	2018-04-02 13:52:23 -03:00
perf.data-file-format.txt	perf tools: Fix perf.data format description of NRCPUS header	2018-05-30 15:40:26 -03:00
perf.txt	perf tools: Handle -h and -v options	2015-10-05 16:36:18 -03:00
perfconfig.example	perf config: Show default report configuration in example and docs	2016-09-01 09:44:13 -03:00
tips.txt	perf c2c: Add a tip about cacheline events	2017-12-05 15:43:55 -03:00