diff options
Diffstat (limited to 'demo/perf.c')
| -rw-r--r-- | demo/perf.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/demo/perf.c b/demo/perf.c new file mode 100644 index 0000000..28a20c8 --- /dev/null +++ b/demo/perf.c @@ -0,0 +1,60 @@ +#include "demo.h" + +#define PERF_BASE(n) (0x30150000 | (0x40 * (n))) +#define PERF_CLEAR(n) (*(volatile unsigned *)PERF_BASE(n)) +#define PERF_MEM_READS(n) (*(const volatile unsigned *)PERF_BASE(n)) +#define PERF_MEM_WRITES(n) (*(const volatile unsigned *)(PERF_BASE(n) + 4)) +#define PERF_MEM_READ_CYCLES(n) (*(const volatile unsigned *)(PERF_BASE(n) + 8)) +#define PERF_MEM_WRITE_CYCLES(n) (*(const volatile unsigned *)(PERF_BASE(n) + 12)) +#define PERF_RING_READS(n) (*(const volatile unsigned *)(PERF_BASE(n) + 16)) +#define PERF_RING_INVALS(n) (*(const volatile unsigned *)(PERF_BASE(n) + 20)) +#define PERF_RING_READ_INVALS(n) (*(const volatile unsigned *)(PERF_BASE(n) + 24)) +#define PERF_RING_REPLIES(n) (*(const volatile unsigned *)(PERF_BASE(n) + 28)) +#define PERF_RING_FORWARDS(n) (*(const volatile unsigned *)(PERF_BASE(n) + 32)) +#define PERF_RING_CYCLES(n) (*(const volatile unsigned *)(PERF_BASE(n) + 36)) +#define PERF_IO_READS(n) (*(const volatile unsigned *)(PERF_BASE(n) + 40)) +#define PERF_IO_WRITES(n) (*(const volatile unsigned *)(PERF_BASE(n) + 44)) + +#define PERF_MIN_MASK 0x0000ffff +#define PERF_MAX_MASK 0xffff0000 +#define PERF_MAX_SHIFT 16 + +void perf_show(unsigned cpu) +{ + print("dumping performance counters for cpu%u", cpu); + + unsigned mem_reads = PERF_MEM_READS(cpu); + unsigned mem_writes = PERF_MEM_WRITES(cpu); + unsigned read_cycles = PERF_MEM_READ_CYCLES(cpu); + unsigned write_cycles = PERF_MEM_WRITE_CYCLES(cpu); + unsigned ring_reads = PERF_RING_READS(cpu); + unsigned ring_invals = PERF_RING_INVALS(cpu); + unsigned ring_read_invals = PERF_RING_READ_INVALS(cpu); + unsigned ring_replies = PERF_RING_REPLIES(cpu); + unsigned ring_forwards = PERF_RING_FORWARDS(cpu); + unsigned ring_cycles = PERF_RING_CYCLES(cpu); + unsigned io_reads = PERF_IO_READS(cpu); + unsigned io_writes = PERF_IO_WRITES(cpu); + + unsigned min_ring_cycles = ring_cycles & PERF_MIN_MASK; + unsigned max_ring_cycles = (ring_cycles & PERF_MAX_MASK) >> PERF_MAX_SHIFT; + unsigned min_read_cycles = read_cycles & PERF_MIN_MASK; + unsigned max_read_cycles = (read_cycles & PERF_MAX_MASK) >> PERF_MAX_SHIFT; + unsigned min_write_cycles = write_cycles & PERF_MIN_MASK; + unsigned max_write_cycles = (write_cycles & PERF_MAX_MASK) >> PERF_MAX_SHIFT; + unsigned ring_sends = ring_reads + ring_invals + ring_read_invals; + + print("requests: sends=%u forwards=%u replies=%u", ring_sends, ring_forwards, ring_replies); + print("requests sent: read=%u inval=%u read_inval=%u", ring_reads, ring_invals, ring_read_invals); + print("memory: misses=%u writebacks=%u", mem_reads, mem_writes); + print("uncached i/o: reads=%u writes=%u", io_reads, io_writes); + print("ring cycles: min=%u max=%u", min_ring_cycles, max_ring_cycles); + print("mem read cycles: min=%u max=%u", min_read_cycles, max_read_cycles); + print("mem write cycles: min=%u max=%u", min_write_cycles, max_write_cycles); +} + +void perf_clear(unsigned cpu) +{ + PERF_CLEAR(cpu) = 0; + print("cleared performance counters for cpu%u", cpu); +} |