zeit_t test_ucontext_zeit( zeit_t ov)
{
ctx::stack_allocator alloc;
::getcontext( & uc);
uc.uc_stack.ss_sp =
static_cast< char * >( alloc.allocate(ctx::default_stacksize() ) )
- ctx::default_stacksize();
uc.uc_stack.ss_size = ctx::default_stacksize();
::makecontext( & uc, f2, 7);
// cache warum-up
BOOST_PP_REPEAT_FROM_TO( 0, BOOST_PP_LIMIT_MAG, CALL_UCONTEXT, ~)
zeit_t start( zeit() );
BOOST_PP_REPEAT_FROM_TO( 0, BOOST_PP_LIMIT_MAG, CALL_UCONTEXT, ~)
zeit_t total( zeit() - start);
// we have two jumps and two measuremt-overheads
total -= ov; // overhead of measurement
total /= BOOST_PP_LIMIT_MAG; // per call
total /= 2; // 2x jump_to c1->c2 && c2->c1
return total;
}
zeit_t test_function_zeit( zeit_t ov)
{
boost::function< void() > fn( boost::bind( f3) );
// cache warum-up
BOOST_PP_REPEAT_FROM_TO( 0, BOOST_PP_LIMIT_MAG, CALL_FUNCTION, ~)
zeit_t start( zeit() );
BOOST_PP_REPEAT_FROM_TO( 0, BOOST_PP_LIMIT_MAG, CALL_FUNCTION, ~)
zeit_t total( zeit() - start);
// we have two jumps and two measuremt-overheads
total -= ov; // overhead of measurement
total /= BOOST_PP_LIMIT_MAG; // per call
total /= 2; // 2x jump_to c1->c2 && c2->c1
return total;
}
zeit_t test_zeit( zeit_t ov, coro::flag_fpu_t preserve_fpu)
{
# if defined(BOOST_USE_SEGMENTED_STACKS)
boost::coroutines::coroutine< void >::pull_type c( fn, coro::attributes( preserve_fpu) );
# else
coro::simple_stack_allocator< 8 * 1024 * 1024, 64 * 1024, 8 * 1024 > alloc;
boost::coroutines::coroutine< void >::pull_type c( fn, coro::attributes( preserve_fpu), alloc);
# endif
// cache warum-up
BOOST_PP_REPEAT_FROM_TO( 0, BOOST_PP_LIMIT_MAG, CALL_COROUTINE, ~)
zeit_t start( zeit() );
BOOST_PP_REPEAT_FROM_TO( 0, BOOST_PP_LIMIT_MAG, CALL_COROUTINE, ~)
zeit_t total( zeit() - start);
// we have two jumps and two measuremt-overheads
total -= ov; // overhead of measurement
total /= BOOST_PP_LIMIT_MAG; // per call
total /= 2; // 2x jump_to c1->c2 && c2->c1
return total;
}
zeit_t test_fcontext_zeit( zeit_t ov)
{
stack_allocator alloc;
fc = ctx::make_fcontext(
alloc.allocate(stack_allocator::default_stacksize()),
stack_allocator::default_stacksize(),
f1);
ctx::jump_fcontext( & fcm, fc, 7, pres_fpu);
// cache warum-up
BOOST_PP_REPEAT_FROM_TO( 0, BOOST_PP_LIMIT_MAG, CALL_FCONTEXT, ~)
zeit_t start( zeit() );
BOOST_PP_REPEAT_FROM_TO( 0, BOOST_PP_LIMIT_MAG, CALL_FCONTEXT, ~)
zeit_t total( zeit() - start);
// we have two jumps and two measuremt-overheads
total -= ov; // overhead of measurement
total /= BOOST_PP_LIMIT_MAG; // per call
total /= 2; // 2x jump_to c1->c2 && c2->c1
return total;
}
zeit_t test_fcontext_zeit( zeit_t ov)
{
ctx::stack_allocator alloc;
fc.fc_stack.base = alloc.allocate(ctx::default_stacksize());
fc.fc_stack.limit =
static_cast< char * >( fc.fc_stack.base) - ctx::default_stacksize();
ctx::make_fcontext( & fc, f1);
ctx::jump_fcontext( & fcm, & fc, 7, preserve_fpu);
// cache warum-up
BOOST_PP_REPEAT_FROM_TO( 0, BOOST_PP_LIMIT_MAG, CALL_FCONTEXT, ~)
zeit_t start( zeit() );
BOOST_PP_REPEAT_FROM_TO( 0, BOOST_PP_LIMIT_MAG, CALL_FCONTEXT, ~)
zeit_t total( zeit() - start);
// we have two jumps and two measuremt-overheads
total -= ov; // overhead of measurement
total /= BOOST_PP_LIMIT_MAG; // per call
total /= 2; // 2x jump_to c1->c2 && c2->c1
return total;
}
zeit_t operator()()
{
zeit_t start( zeit() );
return zeit() - start;
}
