diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965/gen6_queryobj.c')
| -rw-r--r-- | src/mesa/drivers/dri/i965/gen6_queryobj.c | 28 |
1 files changed, 8 insertions, 20 deletions
diff --git a/src/mesa/drivers/dri/i965/gen6_queryobj.c b/src/mesa/drivers/dri/i965/gen6_queryobj.c index 98cbbff914..0014a67e71 100644 --- a/src/mesa/drivers/dri/i965/gen6_queryobj.c +++ b/src/mesa/drivers/dri/i965/gen6_queryobj.c @@ -219,30 +219,18 @@ gen6_queryobj_get_results(struct gl_context *ctx, /* The query BO contains the starting and ending timestamps. * Subtract the two and convert to nanoseconds. */ - query->Base.Result += 80 * (results[1] - results[0]); + query->Base.Result = brw_raw_timestamp_delta(brw, results[0], results[1]); + query->Base.Result = brw_timebase_scale(brw, query->Base.Result); break; case GL_TIMESTAMP: - /* Our timer is a clock that increments every 80ns (regardless of - * other clock scaling in the system). The timestamp register we can - * read for glGetTimestamp() masks out the top 32 bits, so we do that - * here too to let the two counters be compared against each other. - * - * If we just multiplied that 32 bits of data by 80, it would roll - * over at a non-power-of-two, so an application couldn't use - * GL_QUERY_COUNTER_BITS to handle rollover correctly. Instead, we - * report 36 bits and truncate at that (rolling over 5 times as often - * as the HW counter), and when the 32-bit counter rolls over, it - * happens to also be at a rollover in the reported value from near - * (1<<36) to 0. - * - * The low 32 bits rolls over in ~343 seconds. Our 36-bit result - * rolls over every ~69 seconds. - * - * The query BO contains a single timestamp value in results[0]. + /* The query BO contains a single timestamp value in results[0]. */ + query->Base.Result = brw_timebase_scale(brw, results[0]); + + /* Ensure the scaled timestamp overflows according to + * GL_QUERY_COUNTER_BITS */ - query->Base.Result = 80 * (results[0] & 0xffffffff); - query->Base.Result &= (1ull << 36) - 1; + query->Base.Result &= (1ull << ctx->Const.QueryCounterBits.Timestamp) - 1; break; case GL_SAMPLES_PASSED_ARB: |