perf bench: Make the mem/memcpy tests more user-friendly
authorHitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Fri, 20 Nov 2009 03:37:17 +0000 (12:37 +0900)
committerIngo Molnar <mingo@elte.hu>
Sun, 22 Nov 2009 08:41:06 +0000 (09:41 +0100)
commit12eac0bf0461910ae6dd7f071f156f75461a37cf
tree14c0b359ba8603f9bb40eb82b73c6de1acf8c1e9
parent827f3b4974c5db2968d4979fe6a0ae00ab37bdd8
perf bench: Make the mem/memcpy tests more user-friendly

mem-memcpy.c uses perf event system calls to obtain CPU clocks.
And it suddenly dies with BUG_ON() when it running on Linux
doesn't support perf event.

Also fail at calloc() can occur easily when too large
length is passed. Fail of calloc() causes sudden death
with assert().

These behaviours are not friendly. So I fixed the treating of
errors.

Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <1258688237-3797-1-git-send-email-mitake@dcl.info.waseda.ac.jp>
[ v2: improved a few small details ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
tools/perf/bench/mem-memcpy.c