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m1/perf/: added instrumentation for monitoring register allocation

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This commit is contained in:
Werner Almesberger 2011-09-18 06:56:00 -03:00
parent a66c9577b2
commit abd7de7265
1 changed files with 22 additions and 0 deletions
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22
m1/perf/sched.c
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@ -31,6 +31,8 @@
#include <hw/pfpu.h> #include <hw/pfpu.h>
#define REG_STATS
#ifdef DEBUG #ifdef DEBUG
#define Dprintf printf #define Dprintf printf
#else #else
@ -88,6 +90,9 @@ static struct sched_ctx {
struct list unscheduled; /* unscheduled insns */ struct list unscheduled; /* unscheduled insns */
struct list waiting; /* insns waiting to be scheduled */ struct list waiting; /* insns waiting to be scheduled */
struct list ready[PFPU_PROGSIZE]; /* insns ready at nth cycle */ struct list ready[PFPU_PROGSIZE]; /* insns ready at nth cycle */
#ifdef REG_STATS
int max_regs, curr_regs; /* allocation statistics */
#endif
} *sc; } *sc;
@ -211,6 +216,13 @@ static int alloc_reg(struct insn *setter)
reg = list_pop(&sc->unallocated); reg = list_pop(&sc->unallocated);
if (!reg) if (!reg)
abort(); abort();
#ifdef REG_STATS
sc->curr_regs++;
if (sc->curr_regs > sc->max_regs)
sc->max_regs = sc->curr_regs;
#endif
reg->vm_reg = vm_reg; reg->vm_reg = vm_reg;
pfpu_reg = reg-sc->pfpu_regs; pfpu_reg = reg-sc->pfpu_regs;
@ -238,6 +250,10 @@ static void put_reg(int vm_reg)
Dprintf(" free reg %d\n", regs[vm_idx].pfpu_reg); Dprintf(" free reg %d\n", regs[vm_idx].pfpu_reg);
#ifdef REG_STATS
sc->curr_regs--;
#endif
/* /*
* Prepend so that register numbers stay small and bugs reveal * Prepend so that register numbers stay small and bugs reveal
* themselves more rapidly. * themselves more rapidly.
@ -488,7 +504,13 @@ int gfpus_schedule(struct fpvm_fragment *frag, unsigned int *code,
init_scheduler_context(frag, reg); init_scheduler_context(frag, reg);
memset(code, 0, PFPU_PROGSIZE*sizeof(*code)); memset(code, 0, PFPU_PROGSIZE*sizeof(*code));
res = schedule(code); res = schedule(code);
#ifdef REG_STATS
printf("regs: %d/%d\n", sc->curr_regs, sc->max_regs);
#endif
free(sc->regs); free(sc->regs);
free(sc);
if (res < 0) if (res < 0)
return res; return res;
if (frag->vector_mode) if (frag->vector_mode)