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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2015-12-19 17:05:32 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2015-12-20 13:02:02 +0000 |
| commit | 27e093dd1fe3c49389c302f1f3234a0769fd75dc (patch) | |
| tree | 15ce88dd950b1efa4b0805db79749a5c1936694f /benchmarks/gem_latency.c | |
| parent | c0942bf52866d3182cf2e6dcf7c6960098420aeb (diff) | |
benchmarks/gem_latency: Use RCS on Sandybridge
Reading BCS_TIMESTAMP just returns 0...
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'benchmarks/gem_latency.c')
| -rw-r--r-- | benchmarks/gem_latency.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/benchmarks/gem_latency.c b/benchmarks/gem_latency.c index 44839d4f..d1ff779e 100644 --- a/benchmarks/gem_latency.c +++ b/benchmarks/gem_latency.c @@ -44,6 +44,10 @@ static int done; static int fd; +static volatile uint32_t *timestamp_reg; + +#define REG(x) (volatile uint32_t *)((volatile char *)igt_global_mmio + x) +#define REG_OFFSET(x) ((volatile char *)(x) - (volatile char *)igt_global_mmio) struct consumer { pthread_t thread; @@ -92,8 +96,9 @@ struct producer { #define WIDTH 1024 #define HEIGHT 1024 +#define RCS_TIMESTAMP (0x2000 + 0x358) #define BCS_TIMESTAMP (0x22000 + 0x358) -#define CYCLES_TO_NS(x) (80*(x)) +#define CYCLES_TO_NS(x) (80.*(x)) #define CYCLES_TO_US(x) (CYCLES_TO_NS(x)/1000.) static uint32_t create_workload(int gen, uint32_t scratch, int factor) @@ -193,7 +198,7 @@ static void setup_latency(struct producer *p, int gen) map[i++] = 0x24 << 23 | 1; if (has_64bit_reloc) map[i-1]++; - map[i++] = BCS_TIMESTAMP; + map[i++] = REG_OFFSET(timestamp_reg); p->latency_dispatch.reloc[0].offset = i * sizeof(uint32_t); p->latency_dispatch.reloc[0].delta = 4000; p->latency_dispatch.reloc[0].target_handle = handle; @@ -238,11 +243,10 @@ static void setup_nop(struct producer *p, uint32_t batch) eb->rsvd1 = p->ctx; } -#define READ(x) *(volatile uint32_t *)((volatile char *)igt_global_mmio + x) static void measure_latency(struct producer *p, igt_stats_t *stats) { gem_sync(fd, p->latency_dispatch.exec[0].handle); - igt_stats_push(stats, READ(BCS_TIMESTAMP) - *p->last_timestamp); + igt_stats_push(stats, *timestamp_reg - *p->last_timestamp); } static void *producer(void *arg) @@ -251,7 +255,7 @@ static void *producer(void *arg) int n; while (!done) { - uint32_t start = READ(BCS_TIMESTAMP); + uint32_t start = *timestamp_reg; int batches; /* Control the amount of work we do, similar to submitting @@ -374,6 +378,16 @@ static int run(int seconds, intel_register_access_init(intel_get_pci_device(), false); + if (gen == 6) + timestamp_reg = REG(RCS_TIMESTAMP); + else + timestamp_reg = REG(BCS_TIMESTAMP); + + nrun = *timestamp_reg; + usleep(1); + if (*timestamp_reg == nrun) + return 77; + scratch = gem_create(fd, 4*WIDTH*HEIGHT); nop_batch = create_nop(); workload_batch = create_workload(gen, scratch, workload); |