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Ian, This patch adds separate timers for each of the three linker passes (initial, middle, final). I find them useful for investigating (at a coarse level) where --threads is helping. It doesn't necessarily need to get checked in, but I thought I'd ask if you think it could be generally useful. For links out of tmpfs, it turns out that the entire speed up due to multi-threading is in pass 3. -cary * gold/gold.cc: Include timer.h. (queue_middle_tasks): Stamp time. (queue_final_tasks): Likewise. * gold/main.cc (main): Store timer in parameters. Print timers for each pass. * gold/parameters.cc (Parameters::Parameters): Initialize timer_. (Parameters::set_timer): New function. (set_parameters_timer): New function. * gold/parameters.h (Parameters::set_timer): New function. (Parameters::timer): New function. (Parameters::timer_): New data member. (set_parameters_timer): New function. * gold/timer.cc (Timer::stamp): New function. (Timer::get_pass_time): New function. * gold/timer.h (Timer::stamp): New function. (Timer::get_pass_time): New function. (Timer::pass_times_): New data member.
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gold-pass-timers-patch.txt
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