Ingo Molnar 6db175c733 perf bench: Remove the prefaulting complication from 'perf bench mem mem*' ... So 'perf bench mem memcpy/memset' has elaborate code to measure memcpy()/memset() performance both with freshly allocated buffers (which includes initial page fault overhead) and with preallocated buffers. But the thing is, the resulting bandwidth results are mostly meaningless, because page faults dominate so much of the cost. It might make sense to measure cache cold vs. cache hot performance, but the code does not do this. So remove this complication, and always prefault the ranges before using them. Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1445241870-24854-6-git-send-email-mingo@kernel.org [ Remove --no-prefault, --only-prefault from docs, noticed by David Ahern ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		2015-10-19 16:03:31 -03:00
..
arch	perf tests: Add Intel CQM test	2015-10-05 16:56:07 -03:00
bench	perf bench: Remove the prefaulting complication from 'perf bench mem mem*'	2015-10-19 16:03:31 -03:00
config	Merge branch 'perf/urgent' into perf/core, to pick up fixes before applying new changes	2015-09-18 09:24:01 +02:00
Documentation	perf bench: Remove the prefaulting complication from 'perf bench mem mem*'	2015-10-19 16:03:31 -03:00
python	perf python: Support the PERF_RECORD_SWITCH event	2015-10-07 19:41:50 -03:00
scripts	perf tools: Add more documentation to export-to-postgresql.py script	2015-09-28 16:53:07 -03:00
tests	perf test: Suppress libtraceevent warnings	2015-10-19 14:58:10 -03:00
trace/strace/groups	perf trace: Add read/write to the file group	2015-09-04 13:22:06 -03:00
ui	perf hists browser: Add 'm' key for context menu display	2015-10-12 23:29:14 -03:00
util	perf test: Suppress libtraceevent warnings	2015-10-19 14:58:10 -03:00
.gitignore	perf tools: Add Intel PT instruction decoder	2015-08-17 11:11:36 -03:00
Build	perf trace: Support 'strace' syscall event groups	2015-07-20 15:16:32 -03:00
builtin-annotate.c	perf env: Rename some leftovers from rename to perf_env	2015-09-14 12:50:20 -03:00
builtin-bench.c	perf bench futex: Add lock_pi stresser	2015-07-20 17:49:51 -03:00
builtin-buildid-cache.c	perf buildid: Introduce sysfs/filename__sprintf_build_id	2015-08-28 14:53:50 -03:00
builtin-buildid-list.c	perf buildid: Introduce sysfs/filename__sprintf_build_id	2015-08-28 14:53:50 -03:00
builtin-data.c	perf data: Support using -f to override perf.data file ownership for 'convert'	2015-04-02 13:18:52 -03:00
builtin-diff.c	perf callchain: Allow disabling call graphs per event	2015-08-12 13:20:28 -03:00
builtin-evlist.c	perf evlist: Support using -f to override perf.data file ownership	2015-04-02 13:18:45 -03:00
builtin-help.c	perf tools: Add the bash completion for listing subsubcommands of perf help	2015-03-19 13:49:39 -03:00
builtin-inject.c	perf inject: Add --strip option to strip out non-synthesized events	2015-09-28 17:19:51 -03:00
builtin-kmem.c	perf machine: Add method for common kernel_map(FUNCTION) operation	2015-09-30 18:34:29 -03:00
builtin-kvm.c	tools lib api fs: Replace debugfs/tracefs objects interface with fs.c	2015-09-14 12:50:15 -03:00
builtin-list.c	perf list: Do event name substring search as last resort when no events found	2015-10-01 12:12:22 -03:00
builtin-lock.c	perf machine: Protect the machine->threads with a rwlock	2015-05-08 16:19:27 -03:00
builtin-mem.c	perf mem: Fill in the missing session freeing after an error occurs	2015-07-01 17:53:49 -03:00
builtin-probe.c	perf probe: Allow probing on kmodules without dwarf	2015-10-02 15:59:23 -03:00
builtin-record.c	perf record: Change 'record.samples' type to unsigned long long	2015-10-02 16:11:08 -03:00
builtin-report.c	perf callchain: Switch default to 'graph,0.5,caller'	2015-10-05 17:59:43 -03:00
builtin-sched.c	perf sched: Add option to merge like comms to lat output	2015-05-27 12:21:45 -03:00
builtin-script.c	perf script: Make scripting_max_stack value allow for synthesized callchains	2015-09-28 17:09:41 -03:00
builtin-stat.c	perf stat: Reduce min --interval-print to 10ms	2015-10-02 17:07:55 -03:00
builtin-timechart.c	perf tools: Elliminate alignment holes	2015-05-18 10:17:33 -03:00
builtin-top.c	perf top: Register idle thread	2015-10-01 09:54:33 -03:00
builtin-trace.c	perf evsel: Propagate error info from tp_format	2015-09-15 09:48:33 -03:00
builtin.h	perf tools: Add new 'perf data' command	2015-02-25 12:42:25 -03:00
command-list.txt	perf tools: Add new 'perf data' command	2015-02-25 12:42:25 -03:00
CREDITS
design.txt	perf tools: Update some code references in design.txt	2014-03-18 18:17:06 -03:00
Makefile	perf build: Fix single target build dependency check	2015-06-22 11:27:09 -03:00
Makefile.perf	tools build: Build fixdep helper from perf and basic libs	2015-09-28 15:50:55 -03:00
MANIFEST	perf tools: Add include/err.h into MANIFEST	2015-09-22 10:47:05 -03:00
perf-archive.sh
perf-completion.sh	perf tools: Avoid confusion with preloaded bash function for perf bash completion	2015-03-19 13:53:27 -03:00
perf-read-vdso.c	perf tools: Build programs to copy 32-bit compatibility	2014-10-29 10:32:48 -02:00
perf-sys.h	perf tools: Move generic barriers out of perf-sys.h	2015-05-08 16:05:08 -03:00
perf-with-kcore.sh	perf tools: Fix perf-with-kcore handling of arguments containing spaces	2015-08-06 16:48:27 -03:00
perf.c	perf tools: Handle -h and -v options	2015-10-05 16:36:18 -03:00
perf.h	perf record: Add ability to name registers to record	2015-08-31 18:01:33 -03:00