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a198996c7a
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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
..
cgroup cgroups: fix cgroup_event_listener error handling 2013-01-08 10:00:44 -08:00
firewire tools/firewire: nosy-dump: check for allocation failure 2012-12-02 20:10:18 +01:00
hv tools: hv: Improve error logging in KVP daemon. 2013-06-17 15:54:59 -07:00
include/tools tools/include: use stdint types for user-space byteshift headers 2013-07-03 16:02:28 +02:00
lguest lguest: fix example launcher compilation for broken glibc headers. 2013-07-04 11:25:07 +09:30
lib tools lib traceevent: Port kbuffer parser routines 2013-07-12 13:52:16 -03:00
net filter: add minimal BPF JIT image disassembler 2013-03-21 11:35:41 -04:00
nfsd
perf perf bench: Fix memcpy benchmark for large sizes 2013-07-22 12:41:56 -03:00
power cpupower: Add Haswell family 0x45 specific idle monitor to show PC8,9,10 states 2013-07-05 01:52:19 +02:00
scripts tools: Get only verbose output with V=1 2013-07-08 17:31:34 -03:00
testing Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2013-07-09 18:24:39 -07:00
usb tools: usb: ffs-test: Fix build failure 2013-03-07 12:23:17 +08:00
virtio tools/virtio: move module license stub to module.h 2013-07-09 10:47:53 +09:30
vm tools/vm: Switch to liblk library 2013-03-15 13:06:01 -03:00
Makefile Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2013-05-01 14:08:52 -07:00