89 lines
1.9 KiB
C++
89 lines
1.9 KiB
C++
#include "master.hpp"
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namespace factor
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{
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profiling_sample::profiling_sample(factor_vm *vm,
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cell sample_count,
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cell gc_sample_count,
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context *ctx)
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:
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sample_count(sample_count),
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gc_sample_count(gc_sample_count),
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ctx(ctx)
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{
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vm->record_callstack_sample(&callstack_begin, &callstack_end);
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}
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void factor_vm::record_sample()
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{
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cell recorded_sample_count;
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cell recorded_gc_sample_count;
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recorded_sample_count = safepoint_sample_count;
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recorded_gc_sample_count = safepoint_gc_sample_count;
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if (recorded_sample_count == 0 && recorded_gc_sample_count == 0)
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return;
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/* Another sample signal could be raised while we record these counts */
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FACTOR_ATOMIC_SUB(&safepoint_sample_count, recorded_sample_count);
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FACTOR_ATOMIC_SUB(&safepoint_gc_sample_count, recorded_gc_sample_count);
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samples.push_back(profiling_sample(
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this,
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recorded_sample_count,
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recorded_gc_sample_count,
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ctx
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));
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}
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void factor_vm::record_callstack_sample(cell *begin, cell *end)
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{
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*begin = sample_callstacks.size();
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stack_frame *frame = ctx->callstack_bottom - 1;
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while (frame >= ctx->callstack_top) {
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sample_callstacks.push_back((code_block*)frame->entry_point - 1);
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frame = frame_successor(frame);
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}
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*end = sample_callstacks.size();
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}
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void factor_vm::set_sampling_profiler(bool sampling_p)
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{
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if (sampling_p == sampling_profiler_p)
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return;
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if (sampling_p)
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start_sampling_profiler();
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else
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end_sampling_profiler();
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}
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void factor_vm::start_sampling_profiler()
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{
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safepoint_sample_count = 0;
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safepoint_gc_sample_count = 0;
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samples.clear();
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samples.reserve(10*FACTOR_PROFILE_SAMPLES_PER_SECOND);
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sample_callstacks.reserve(100*FACTOR_PROFILE_SAMPLES_PER_SECOND);
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sampling_profiler_p = true;
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start_sampling_profiler_timer();
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}
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void factor_vm::end_sampling_profiler()
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{
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end_sampling_profiler_timer();
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record_sample();
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sampling_profiler_p = false;
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}
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void factor_vm::primitive_sampling_profiler()
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{
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set_sampling_profiler(to_boolean(ctx->pop()));
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}
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}
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