[ceph.git] / ceph / src / boost / libs / context / doc / performance.qbk

[/
          Copyright Oliver Kowalke 2014.
 Distributed under the Boost Software License, Version 1.0.
    (See accompanying file LICENSE_1_0.txt or copy at
          http://www.boost.org/LICENSE_1_0.txt
]

[section:performance Performance]

Performance of __boost_context__ was measured on the platforms shown in the
following table. Performance measurements were taken using `rdtsc` and
`boost::chrono::high_resolution_clock`, with
overhead corrections, on x86 platforms. In each case, cache warm-up was
accounted for, and the one running thread was pinned
to a single CPU. The code was compiled using the build options,
'variant = release cxxflags = -DBOOST_DISABLE_ASSERTS'.

[table Performance of context switch
    [[Platform] [ucontext_t] [execution_context (v1)] [execution_context (v2)]]
    [
        [x86_64 [footnote Intel Core2 Q6700]]
        [547 ns / 1433 cycles]
        [51 ns / 141 cycles]
        [7 ns / 18 cycles]
    ]
]


[endsect]
Commit	Line	Data
7c673cae FG	1	[/
	2	Copyright Oliver Kowalke 2014.
	3	Distributed under the Boost Software License, Version 1.0.
	4	(See accompanying file LICENSE_1_0.txt or copy at
	5	http://www.boost.org/LICENSE_1_0.txt
	6	]
	7
	8	[section:performance Performance]
	9
	10	Performance of __boost_context__ was measured on the platforms shown in the
	11	following table. Performance measurements were taken using `rdtsc` and
	12	`boost::chrono::high_resolution_clock`, with
	13	overhead corrections, on x86 platforms. In each case, cache warm-up was
	14	accounted for, and the one running thread was pinned
	15	to a single CPU. The code was compiled using the build options,
	16	'variant = release cxxflags = -DBOOST_DISABLE_ASSERTS'.
	17
	18	[table Performance of context switch
	19	[[Platform] [ucontext_t] [execution_context (v1)] [execution_context (v2)]]
	20	[
	21	[x86_64 [footnote Intel Core2 Q6700]]
	22	[547 ns / 1433 cycles]
	23	[51 ns / 141 cycles]
	24	[7 ns / 18 cycles]
	25	]
	26	]
	27
	28
	29	[endsect]