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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-01-19 21:11:28 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-01-19 21:13:24 +0000 |
| commit | 28c33c6f90016f494d387ff8e886632ad3b5dfc6 (patch) | |
| tree | 97e82321bd7ad6d117d3f5c5984c42dec6201dec /tests | |
| parent | 6cf9d911ab0887f481f25351ab480d44cf044e07 (diff) | |
igt/gem_exec_alignment: Fix off-by-one in evalation of find_last_bit()
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/gem_exec_alignment.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/tests/gem_exec_alignment.c b/tests/gem_exec_alignment.c index a45a7312..a18e23f7 100644 --- a/tests/gem_exec_alignment.c +++ b/tests/gem_exec_alignment.c @@ -85,10 +85,10 @@ static void many(int fd) if (count > file_max()) /* vfs cap */ count = file_max(); max_alignment = find_last_bit(gtt_size / count); - if (max_alignment <= 12) + if (max_alignment <= 13) max_alignment = 4096; else - max_alignment = 1ull << max_alignment; + max_alignment = 1ull << (max_alignment - 1); count = gtt_size / max_alignment / 2; igt_info("gtt_size=%lld MiB, max-alignment=%lld, count=%lld\n", @@ -125,7 +125,7 @@ static void many(int fd) igt_debug("testing %lld x alignment=%#llx [%db]\n", (long long)execbuf.buffer_count - 1, (long long)alignment, - find_last_bit(alignment)); + find_last_bit(alignment)-1); gem_execbuf(fd, &execbuf); for (i = 0; i < count; i++) igt_assert_eq_u64(execobj[i].alignment, alignment); @@ -185,7 +185,7 @@ static void single(int fd) igt_debug("starting offset: %#llx, next alignment: %#llx [%db]\n", (long long)execobj.offset, (long long)execobj.alignment, - find_last_bit(execobj.alignment)); + find_last_bit(execobj.alignment)-1); gem_execbuf(fd, &execbuf); igt_assert_eq_u64(execobj.offset % execobj.alignment, 0); } |