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14 commits

Author SHA1 Message Date
hp.com!davidm
02c9034eb2 Tweak such that GCC v4 doesn't optimize it to the point where the
test fails (it managed to unravel the recursion in f1).

(Logical change 1.290)
2005-05-03 09:13:17 +00:00
mostang.com!davidm
50c2be0ca3 Undo some temporary testing hacks.
(Logical change 1.198)
2004-03-31 07:29:27 +00:00
mostang.com!davidm
e3eae74698 (gettime): Go back to gettimeofday(). clock_gettime() requires
librt which requires libpthread, which slows everything
	down.

(Logical change 1.197)
2004-03-31 01:53:04 +00:00
hp.com!davidm
3be31f5dcb Include <unistd.h> and <sys/resource.h>.
(KB): New macro.
(big): Lower the size to 64*MB.  Should be enough for another year... ;-)
(gettime): Fix typo and lower the assumed cache-line size from 64
	to 8 bytes just to be safe across platforms.
(measure_init): Lower N from 1000 to 100.
	(cursor): Add some padding between each unw_cursor_t to avoid
		benefitting from cache-line sharing.
	(uc): Likewise.
	Warm up the TLB before measuring the cold-cache cases.
(main): Unlimit the max. stack-size just in case.
	Write to "big" to ensure it's backed by real memory
	(not just by the zero page).

(Logical change 1.194)
2004-03-30 22:57:06 +00:00
mostang.com!davidm
fc7b49b983 (measure_init): Improve it so that we don't measure noise, such
as context-switches.

(Logical change 1.191)
2004-03-28 00:24:33 +00:00
mostang.com!davidm
96c6250626 Include <memory.h>.
(MB): New macro.
(big): New array.
(measure_unwind): Don't try to measure "init" step---it's too fast.
(f1): Likewise.
(doit): Likewise.
(sum): New function.
(measure_init): Measure unw_getcontext() and unw_local_init() here.
(main): Call measure_init(), adjust labels for doit() calls.

(Logical change 1.190)
2004-03-27 09:25:58 +00:00
mostang.com!davidm
c7fdc72fd6 Make number of iterations controllable via the second command-line
argument.
(gettime): Use clock_gettime() instead of gettimeofday() to get
	(potentially) better resolution.

(Logical change 1.186)
2004-03-20 09:54:28 +00:00
mostang.com!davidm
e1da718101 Add copyright notice.
(Logical change 1.157)
2004-01-21 06:36:35 +00:00
hp.com!davidm
5e446b24d7 (ITERATIONS): New macro.
(maxlevel): New global variable.
(measure_unwind): Return init/step times via arg pointers.
(f1): Pass through init/step pointers.
(doit): New function.
(main): Use doit() instead of open code.

(Logical change 1.130)
2003-11-27 06:52:54 +00:00
mostang.com!davidm
7a346fbf8c Measure with caching disabled, global caching, and thread-local
caching.

(Logical change 1.114)
2003-11-20 01:10:03 +00:00
hp.com!davidm
29f2f89a8f (measure_unwind): Return 0.
(Logical change 1.104)
2003-09-25 05:29:14 +00:00
hp.com!davidm
048d4239ae Collect 20 samples per run.
(Logical change 1.102)
2003-09-24 21:56:42 +00:00
mostang.com!davidm
12876ef781 (Logical change 1.98) 2003-09-24 05:02:14 +00:00
mostang.com!davidm
ee803e7acc Initial revision 2003-09-24 05:02:14 +00:00