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author | Andrew Waterman <waterman@cs.berkeley.edu> | 2016-08-10 12:46:09 -0700 |
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committer | Andrew Waterman <waterman@cs.berkeley.edu> | 2016-08-10 12:46:09 -0700 |
commit | 0a7862c79ffcf931d5369d50b15774cc1ec8f396 (patch) | |
tree | 8e703ef3164e19938b773982094373e6c8f10ea2 /pk | |
parent | 7520a474199df8b9ef7cee32eebcea7577813814 (diff) | |
download | riscv-pk-0a7862c79ffcf931d5369d50b15774cc1ec8f396.zip riscv-pk-0a7862c79ffcf931d5369d50b15774cc1ec8f396.tar.gz riscv-pk-0a7862c79ffcf931d5369d50b15774cc1ec8f396.tar.bz2 |
when -s is passed, print time, instret, cycle, and CPI
Diffstat (limited to 'pk')
-rw-r--r-- | pk/boot.h | 4 | ||||
-rw-r--r-- | pk/pk.c | 9 | ||||
-rw-r--r-- | pk/syscall.c | 12 |
3 files changed, 19 insertions, 6 deletions
@@ -20,7 +20,9 @@ typedef struct { size_t brk_max; size_t mmap_max; size_t stack_top; - size_t t0; + size_t time0; + size_t cycle0; + size_t instret0; } elf_info; extern elf_info current; @@ -13,7 +13,7 @@ static void handle_option(const char* s) switch (s[1]) { case 's': // print cycle count upon termination - current.t0 = 1; + current.cycle0 = 1; break; default: @@ -105,8 +105,11 @@ static void run_loaded_program(size_t argc, char** argv, uintptr_t kstack_top) STACK_INIT(uintptr_t); - if (current.t0) // start timer if so requested - current.t0 = rdcycle(); + if (current.cycle0) { // start timer if so requested + current.time0 = rdtime(); + current.cycle0 = rdcycle(); + current.instret0 = rdinstret(); + } trapframe_t tf; init_tf(&tf, current.entry, stack_top); diff --git a/pk/syscall.c b/pk/syscall.c index 8d9a661..85139e4 100644 --- a/pk/syscall.c +++ b/pk/syscall.c @@ -15,8 +15,16 @@ typedef long (*syscall_t)(long, long, long, long, long, long, long); void sys_exit(int code) { - if (current.t0) - printk("%ld cycles\n", rdcycle() - current.t0); + if (current.cycle0) { + size_t dt = rdtime() - current.time0; + size_t dc = rdcycle() - current.cycle0; + size_t di = rdinstret() - current.instret0; + + printk("%ld ticks\n", dt); + printk("%ld cycles\n", dc); + printk("%ld instructions\n", di); + printk("%d.%d%d CPI\n", dc/di, 10ULL*dc/di % 10, (100ULL*dc + di/2)/di % 10); + } shutdown(code); } |