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| author | philippe <philippe@a5019735-40e9-0310-863c-91ae7b9d1cf9> | 2012-01-17 22:27:47 +0000 |
|---|---|---|
| committer | philippe <philippe@a5019735-40e9-0310-863c-91ae7b9d1cf9> | 2012-01-17 22:27:47 +0000 |
| commit | 5928d3955bb3ce844bbd0fb84a81ba95bbbc154b (patch) | |
| tree | 9ce2638eb1791c31ccb4d70f5367742d589a9473 | |
| parent | 6643e96a72e8530a7c8830c02ffb2fb4aee74c88 (diff) | |
| download | valgrind-5928d3955bb3ce844bbd0fb84a81ba95bbbc154b.tar.gz | |
Add a perf test to measure the speed (and memory) of PDB handling.
* modified perf/heap.c so that it optionally creates a partially defined bytes every N bytes
* created perf/heap_pdb4.vgperf calling heap 4 (so one byte on 4 is PDB in what heap allocates).
before/after pool alloc, here are the performances on a ppc64. So, it looks like
pool alloc also significantly improves the speed of PDB handling.
perl perf/vg_perf --vg=../pool_alloc --vg=../before_pool_trunk_untouched --reps=5 perf/heap_pdb4.vgperf
-- heap_pdb4 --
heap_pdb4 pool_alloc:0.41s no: 3.0s ( 7.3x, -----) me:11.9s (29.0x, -----)
heap_pdb4 before_pool_trunk_untouched:0.41s no: 3.1s ( 7.6x, -3.7%) me:16.9s (41.1x,-41.7%)
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12342 a5019735-40e9-0310-863c-91ae7b9d1cf9
| -rw-r--r-- | perf/Makefile.am | 1 | ||||
| -rw-r--r-- | perf/heap.c | 15 | ||||
| -rw-r--r-- | perf/heap_pdb4.vgperf | 2 |
3 files changed, 17 insertions, 1 deletions
diff --git a/perf/Makefile.am b/perf/Makefile.am index ad5ceac60..66b0ed05d 100644 --- a/perf/Makefile.am +++ b/perf/Makefile.am @@ -10,6 +10,7 @@ EXTRA_DIST = \ fbench.vgperf \ ffbench.vgperf \ heap.vgperf \ + heap_pdb4.vgperf \ many-loss-records.vgperf \ many-xpts.vgperf \ sarp.vgperf \ diff --git a/perf/heap.c b/perf/heap.c index c84f6cbfc..8b38bec22 100644 --- a/perf/heap.c +++ b/perf/heap.c @@ -7,9 +7,16 @@ char* arr[NLIVE]; -int main ( void ) +int main ( int argc, char* argv[] ) { int i, j, nbytes = 0; + int pdb = 0; + int jpdb; + + if (argc > 1) { + pdb = atoi(argv[1]); + } + printf("initialising\n"); for (i = 0; i < NLIVE; i++) arr[i] = NULL; @@ -22,6 +29,12 @@ int main ( void ) if (arr[j]) free(arr[j]); arr[j] = malloc(nbytes); + if (pdb > 0) { + // create some partially defined bytes in arr[j] + for (jpdb=0; jpdb<nbytes; jpdb = jpdb+pdb) { + arr[j][jpdb] &= (jpdb & 0xff); + } + } // Cycle through the sizes 0,8,16,24,32. Zero will get rounded up to // 8, so the 8B bucket will get twice as much traffic. diff --git a/perf/heap_pdb4.vgperf b/perf/heap_pdb4.vgperf new file mode 100644 index 000000000..30ed0f2c3 --- /dev/null +++ b/perf/heap_pdb4.vgperf @@ -0,0 +1,2 @@ +prog: heap +args: 4 |