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| author | Howard Mao <zhehao.mao@gmail.com> | 2018-03-01 14:58:58 -0800 |
|---|---|---|
| committer | Howard Mao <zhehao.mao@gmail.com> | 2018-03-01 14:58:58 -0800 |
| commit | ecbb5a6cc530a98a6fe4d28c5ac1b0c891b11cb3 (patch) | |
| tree | d6598be03012e586110144d4b27a53c4a594606a | |
| parent | ffa920340430f62e767fb2397f4ee41ffaf441ce (diff) | |
| download | riscv-tests-cs152-sp18-lab3.zip riscv-tests-cs152-sp18-lab3.tar.gz riscv-tests-cs152-sp18-lab3.tar.bz2 | |
read branch count and mispredicts in setStatscs152-sp18-lab3
| -rw-r--r-- | benchmarks/common/syscalls.c | 9 | ||||
| -rw-r--r-- | benchmarks/common/util.h | 4 |
2 files changed, 12 insertions, 1 deletions
diff --git a/benchmarks/common/syscalls.c b/benchmarks/common/syscalls.c index 0a7d6b7..47d889d 100644 --- a/benchmarks/common/syscalls.c +++ b/benchmarks/common/syscalls.c @@ -33,7 +33,7 @@ static uintptr_t syscall(uintptr_t which, uint64_t arg0, uint64_t arg1, uint64_t return magic_mem[0]; } -#define NUM_COUNTERS 2 +#define NUM_COUNTERS 4 static uintptr_t counters[NUM_COUNTERS]; static char* counter_names[NUM_COUNTERS]; @@ -47,8 +47,15 @@ void setStats(int enable) counters[i++] = csr; \ } while (0) + if (enable) { + write_csr(mhpmevent3, 0x0401); + write_csr(mhpmevent4, 0x2001); + } + READ_CTR(mcycle); READ_CTR(minstret); + READ_CTR(mhpmcounter3); + READ_CTR(mhpmcounter4); #undef READ_CTR } diff --git a/benchmarks/common/util.h b/benchmarks/common/util.h index 081cfd6..70bd06e 100644 --- a/benchmarks/common/util.h +++ b/benchmarks/common/util.h @@ -80,11 +80,15 @@ static uintptr_t insn_len(uintptr_t pc) #define stringify(s) stringify_1(s) #define stats(code, iter) do { \ unsigned long _c = -read_csr(mcycle), _i = -read_csr(minstret); \ + unsigned long _b = -read_csr(hpmcounter9), _m = -read_csr(hpmcounter24); \ code; \ _c += read_csr(mcycle), _i += read_csr(minstret); \ + _b += read_csr(hpmcounter9), _m += read_csr(hpmcounter24); \ if (cid == 0) \ printf("\n%s: %ld cycles, %ld.%ld cycles/iter, %ld.%ld CPI\n", \ stringify(code), _c, _c/iter, 10*_c/iter%10, _c/_i, 10*_c/_i%10); \ + printf("%ld branches, %ld mispredicts, %ld.%ld mispredict rate\n", \ + _b, _m, _m/_b, (10*_m/_b)%10); \ } while(0) #endif //__UTIL_H |