Class: RubyProf::FastCallTreePrinter

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby-prof/printers/fast_call_tree_printer.rb,
ext/ruby_prof/rp_fast_call_tree_printer.c

Overview

Optimized implementation of CallTreePrinter

Instance Method Summary collapse

Constructor Details

#initialize(result) ⇒ FastCallTreePrinter

Returns a new instance of FastCallTreePrinter.



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# File 'lib/ruby-prof/printers/fast_call_tree_printer.rb', line 10

def initialize(result)
  @result = result
  @output = nil
end

Instance Method Details

#determine_event_specification_and_value_scale ⇒ Object 



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# File 'lib/ruby-prof/printers/fast_call_tree_printer.rb', line 29

def determine_event_specification_and_value_scale
  @value_scales = []
  @event_specifications = ['events:']

  @result.measure_modes.each do |measure_mode|
    case measure_mode
      when RubyProf::PROCESS_TIME
        @value_scales << RubyProf::CLOCKS_PER_SEC
        @event_specifications << 'process_time'
      when RubyProf::WALL_TIME
        @value_scales << 1_000_000
        @event_specifications << 'wall_time'
      when RubyProf.const_defined?(:CPU_TIME) && RubyProf::CPU_TIME
        @value_scales << RubyProf.cpu_frequency
        @event_specifications << 'cpu_time'
      when RubyProf.const_defined?(:ALLOCATIONS) && RubyProf::ALLOCATIONS
        @value_scales << 1
        @event_specifications << 'allocations'
      when RubyProf.const_defined?(:MEMORY) && RubyProf::MEMORY
        @value_scales << 1
        @event_specifications << 'memory'
      when RubyProf.const_defined?(:GC_RUNS) && RubyProf::GC_RUNS
        @value_scales << 1
        @event_specifications << 'gc_runs'
      when RubyProf.const_defined?(:GC_TIME) && RubyProf::GC_TIME
        @value_scales << 1000000
        @event_specifications << 'gc_time'
      else
        raise "Unknown measure mode: #{measure_mode}"
    end
  end
end

#print(output = STDOUT, options = {}) ⇒ Object

Specify print options.

options - Hash table

:only_threads - list of threads to print



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# File 'lib/ruby-prof/printers/fast_call_tree_printer.rb', line 20

def print(output = STDOUT, options = {})
  @output = output
  @options = options

  determine_event_specification_and_value_scale
  print_headers
  print_threads
end

#print_headers ⇒ Object 



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# File 'lib/ruby-prof/printers/fast_call_tree_printer.rb', line 81

def print_headers
  @output << "#{@event_specifications.join(" ")}\n\n"
  # this doesn't work. kcachegrind does not fully support the spec.
  # output << "thread: #{thread.id}\n\n"
end

#print_thread(thread) ⇒ nil

Prints to @output the call tree of a thread

Returns:

  • (nil) 


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# File 'ext/ruby_prof/rp_fast_call_tree_printer.c', line 216

VALUE
prof_fast_call_tree_printer_print_thread(VALUE self, VALUE thread) {
    thread_data_t *thread_data = prof_get_thread(thread);

    VALUE output = rb_iv_get(self, "@output");
    VALUE value_scales_val = rb_iv_get(self, "@value_scales");

    Check_Type(value_scales_val, T_ARRAY);
    size_t value_scales_len = RARRAY_LEN(value_scales_val);

    call_tree_printer_vars *vars = call_tree_printer_vars_allocate(value_scales_len);
    vars->output = output;
    for(size_t i = 0; i < value_scales_len; i++) {
        vars->value_scales[i] = NUM2DBL(rb_ary_entry(value_scales_val, i));
    }

    print_methods_in_reverse(vars, thread_data->method_table);

    xfree(vars);

    return Qnil;
}

#print_threads ⇒ Object 



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# File 'lib/ruby-prof/printers/fast_call_tree_printer.rb', line 62

def print_threads
  # TODO: merge fibers of a given thread here, instead of relying
  # on the profiler to merge fibers.
  printable_threads.each do |thread|
    print_thread(thread)
  end
end

#printable_threads ⇒ Object 



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# File 'lib/ruby-prof/printers/fast_call_tree_printer.rb', line 70

def printable_threads
  if @options[:only_threads]
    only_thread_ids = @options[:only_threads].map(&:object_id)
    @result.threads.select do |t|
      only_thread_ids.include?(t.id)
    end
  else
    @result.threads
  end
end