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bigcode.c12-Mar-20152.6 KiB

bigcode1.vgperf12-Mar-201514

bigcode2.vgperf12-Mar-201522

bz2.c12-Mar-2015208.4 KiB

bz2.vgperf12-Mar-201510

fbench.c12-Mar-201525.1 KiB

fbench.vgperf12-Mar-201513

ffbench.c12-Mar-201510.2 KiB

ffbench.vgperf12-Mar-201514

heap.c12-Mar-20151 KiB

heap.vgperf12-Mar-201511

heap_pdb4.vgperf12-Mar-201519

Makefile.am12-Mar-2015726

Makefile.in12-Mar-201532.9 KiB

many-loss-records.c12-Mar-20155.3 KiB

many-loss-records.vgperf12-Mar-201590

many-xpts.c12-Mar-2015981

many-xpts.vgperf12-Mar-201564

README12-Mar-20153.1 KiB

sarp.c12-Mar-20151.3 KiB

sarp.vgperf12-Mar-201511

test_input_for_tinycc.c12-Mar-2015190.1 KiB

tinycc.c12-Mar-2015690.1 KiB

tinycc.vgperf12-Mar-201546

vg_perf12-Mar-201517.1 KiB

vg_perf.in12-Mar-201517.1 KiB

README

1=============================================================================
2Notes about performance benchmarks
3=============================================================================
4For each benchmark, here is a brief description and notes about its
5strengths and weaknesses.
6
7-----------------------------------------------------------------------------
8Artificial stress tests
9-----------------------------------------------------------------------------
10bigcode1, bigcode2:
11- Description: Executes a lot of (nonsensical) code.
12- Strengths:   Demonstrates the cost of translation which is a large part
13               of runtime, particularly on larger programs.
14- Weaknesses:  Highly artificial.
15
16heap:
17- Description: Does a lot of heap allocation and deallocation, and has a lot
18               of heap blocks live while doing so.
19- Strengths:   Stress test for an important sub-system; bug #105039 showed
20               that inefficiencies in heap allocation can make a big
21               difference to programs that allocate a lot.
22- Weaknesses:  Highly artificial -- allocation pattern is not real, and only
23               a few different size allocations are used.
24
25sarp:
26- Description: Does a lot of stack allocation and deallocation.
27- Strengths:   Tests for a specific performance bug that existed in 3.1.0 and
28               all earlier versions.
29- Weaknesses:  Highly artificial.
30
31-----------------------------------------------------------------------------
32Real programs
33-----------------------------------------------------------------------------
34bz2:
35- Description: Burrows-Wheeler compression and decompression.
36- Strengths:   A real, widely used program, very similar to the 256.bzip2
37               SPEC2000 benchmark.  Not dominated by any code, the hottest
38               55 blocks account for only 90% of execution.  Has lots of
39               short blocks and stresses the memory system hard.
40- Weaknesses:  None, really, it's a good benchmark.
41
42fbench:
43- Description: Does some ray-tracing.
44- Strengths:   Moderately realistic program.
45- Weaknesses:  Dominated by sin and cos, which are not widely used, and are
46               hardware-supported on x86 but not on other platforms such as
47               PPC.
48
49ffbench: 
50- Description: Does a Fast Fourier Transform (FFT).
51- Strengths:   Tests common FP ops (mostly adding and multiplying array
52               elements), FFT is a very important operation.
53- Weaknesses:  Dominated by the inner loop, which is quite long and flatters
54               Valgrind due to the small dispatcher overhead.
55
56tinycc:
57- Description: A very small and fast C compiler.  A munged version of
58               Fabrice Bellard's TinyCC compiling itself multiple times.
59- Strengths:   A real program, lots of code (top 100 blocks only account for
60               47% of execution), involves large irregular data structures
61               (presumably, since it's a compiler).  Does lots of
62               malloc/free calls and so changes that make a big improvement
63               to perf/heap typically cause a small improvement.
64- Weaknesses   None, really, it's a good benchmark.
65
66