linux/tools/perf
Andi Kleen a198996c7a perf bench: Fix memcpy benchmark for large sizes
The glibc calloc() function has an optimization to not explicitely
memset() very large calloc allocations that just came from mmap(),
because they are known to be zero.

This could result in the perf memcpy benchmark reading only from
the zero page, which gives unrealistic results.

Always call memset explicitly on the source area to avoid this problem.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Hitoshi Mitake <h.mitake@gmail.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Link: http://lkml.kernel.org/n/tip-pzz2qrdq9eymxda0y8yxdn33@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2013-07-22 12:41:56 -03:00
..
arch perf tools: Fix build on non-glibc systems due to libio.h absence 2013-03-15 13:05:13 -03:00
bench perf bench: Fix memcpy benchmark for large sizes 2013-07-22 12:41:56 -03:00
config perf tools: Use default include path notation for libtraceevent headers 2013-07-12 13:45:54 -03:00
Documentation perf diff: Add generic order option for compute sorting 2013-07-12 13:54:16 -03:00
python perf python: Use attr.watermark in twatch.py 2012-01-30 18:38:23 -02:00
scripts perf script: Fix broken include in Context.xs 2013-07-10 13:47:00 -03:00
tests perf tests: Check proper prev_state size for sched_switch tp 2013-07-17 12:34:53 -03:00
ui perf tools: Move hist_entry__period_snprintf into stdio code 2013-07-12 13:54:18 -03:00
util perf evsel: Handle ENODEV on default cycles event 2013-07-22 12:03:57 -03:00
.gitignore perf tools: Ignore compiled python binaries 2012-09-07 12:10:58 -03:00
bash_completion perf tools: Complete tracepoint event names 2012-10-04 12:44:52 -03:00
builtin-annotate.c perf tools: Add support for weight v7 (modified) 2013-04-01 12:19:43 -03:00
builtin-bench.c perf tools: Make numa benchmark optional 2013-01-30 10:36:21 -03:00
builtin-buildid-cache.c perf buildid-cache: Add --update option 2013-02-14 14:59:27 -03:00
builtin-buildid-list.c perf symbols: Generalize filter in __fprintf_buildid methods 2012-12-09 08:46:07 -03:00
builtin-diff.c perf diff: Add generic order option for compute sorting 2013-07-12 13:54:16 -03:00
builtin-evlist.c perf evlist: Pass the event_group info via perf_attr_details 2013-02-06 18:09:28 -03:00
builtin-help.c perf help: Fix --help for builtins 2012-10-22 12:35:49 -02:00
builtin-inject.c perf tools: Remove event types framework completely 2013-07-15 16:28:22 -03:00
builtin-kmem.c perf tools: struct thread has a tid not a pid 2013-07-12 13:53:50 -03:00
builtin-kvm.c perf kvm: Handle realloc failures 2013-05-28 16:24:04 +03:00
builtin-list.c perf list: List kernel supplied event aliases 2013-07-12 13:53:53 -03:00
builtin-lock.c perf record: Remove -f/--force option 2013-07-08 17:37:25 -03:00
builtin-mem.c perf tools: Add new mem command for memory access profiling 2013-04-01 12:21:44 -03:00
builtin-probe.c perf tools: Introduce tools/lib/lk library 2013-03-15 13:06:00 -03:00
builtin-record.c perf tools: Remove event types framework completely 2013-07-15 16:28:22 -03:00
builtin-report.c perf tools: Remove event types framework completely 2013-07-15 16:28:22 -03:00
builtin-sched.c perf tools: struct thread has a tid not a pid 2013-07-12 13:53:50 -03:00
builtin-script.c perf script: Fix named threads support 2013-07-22 11:55:53 -03:00
builtin-stat.c perf stat: Fix per-socket output bug for uncore events 2013-07-08 18:01:46 -03:00
builtin-timechart.c perf timechart: Remove event types framework only user 2013-07-15 16:14:47 -03:00
builtin-top.c perf report/top: Add option to collapse undesired parts of call graph 2013-07-12 13:53:55 -03:00
builtin-trace.c perf tools: struct thread has a tid not a pid 2013-07-12 13:53:50 -03:00
builtin.h perf tools: Add new mem command for memory access profiling 2013-04-01 12:21:44 -03:00
command-list.txt perf tools: Add new mem command for memory access profiling 2013-04-01 12:21:44 -03:00
CREDITS perf_counter tools: Add CREDITS file for Git contributors 2009-06-24 19:54:29 +02:00
design.txt perf tools: Update ioctl documentation for PERF_IOC_FLAG_GROUP 2012-05-31 11:38:42 -03:00
Makefile perf tools: Fix 'make tools/perf' 2013-07-17 10:40:02 -03:00
MANIFEST perf tools: Introduce tools/lib/lk library 2013-03-15 13:06:00 -03:00
perf-archive.sh perf archive: Make 'f' the last parameter for tar 2012-09-17 13:10:42 -03:00
perf.c perf tools: Convert needless static variable to local 2013-04-01 12:22:48 -03:00
perf.h perf tools: Add support for weight v7 (modified) 2013-04-01 12:19:43 -03:00