May
26
In electronic technology, the pulse signal is a voltage according to a certain extent, a certain time interval for the pulse signal issued. Pulse signal as the time interval between the cycles; and in unit time (such as one second) with the number of pulses generated as the frequency. Cycles are described in the frequency of signals (including pulses) in unit time by the number of emerging pulse measurement name; the standard unit of measurement frequencies are Hz (Hz). The computer system clock frequency is a typical very accurate and stable pulse generator. Used in the mathematical expression of frequency "f" that there is the corresponding unit: Hz (Hz), kHz (kilohertz), MHz (megahertz), GHz (GHz). One of 1GHz = 1000MHz, 1MHz = 1000kHz, 1kHz = 1000Hz. Calculation of pulse signal cycle time of the conversion unit and the corresponding relations are: s (second), ms (milliseconds), μs (microseconds), ns (nanoseconds), one of: 1s = 1000ms, 1 ms = 1000μs, 1μs = 1000ns.
CPU's frequency, that is, the work of CPU core clock frequency (CPU Clock Speed). Usually are talking about a certain number of CPU MHz, and the number of MHz is "CPU's frequency." A lot of people think is the frequency of the CPU speed, is not true. CPU frequency of the figure in the CPU with the speed of shock pulses, and the actual CPU computing power and is not directly related. Frequency and the actual speed of operation of the relationship must exist, but there is no formula can determine the quantitative relationship between the two values, because of computational speed depends on CPU pipeline CPU performance in all aspects of target (cache, instruction set, CPU of the median and so on). Frequency is not directly represented because of computational speed, therefore, under certain circumstances, it is possible there will be a higher frequency of the CPU speed lower the actual situation. Such as AMD's AthlonXP series of CPU most of all have a lower frequency, to Intel's Pentium 4 series CPU higher frequency of the CPU performance, so to AthlonXP series CPU only PR value named. CPU frequency is therefore only one aspect of performance, while the CPU does not mean that the overall performance.
CPU does not mean that the frequency of the CPU speed, but increase the CPU frequency to improve computation speed is critical. For example, assume that a CPU in an implementation of a computing instructions per clock cycle, then when the CPU when running at 100MHz frequency, it will run at 50MHz clock speed twice as fast. Since more than 100MHz of the clock cycle of 50MHz clock cycle time reduced by half occupied, that is, the work of the CPU frequency at 100MHz implementation of a computing instruction time job is only 10ns at 50MHz frequency than when the shorter half of 20ns, natural computing doubled the speed of it quickly. Only the overall computer speed depends not only on the CPU to run faster, but also with other operation of the various sub-systems, and only improve at the same time frequency, the various sub-systems and the various sub-operating speed of data transmission speed between the can be improved, the overall computer speed can really be improved.
Improve job GHz CPU mainly by restrictions on the production process. Since the CPU is manufactured on the semiconductor silicon, silicon-on components in between the wires necessary to connect, because of state requirements in the high-frequency finer wires as short as possible in order to reduce stray capacitance wire interference distribution in order to ensure CPU computing right. Manufacturing process, therefore the restrictions are CPU frequency, one of the biggest obstacles to development.
CPU's frequency, that is, the work of CPU core clock frequency (CPU Clock Speed). Usually are talking about a certain number of CPU MHz, and the number of MHz is "CPU's frequency." A lot of people think is the frequency of the CPU speed, is not true. CPU frequency of the figure in the CPU with the speed of shock pulses, and the actual CPU computing power and is not directly related. Frequency and the actual speed of operation of the relationship must exist, but there is no formula can determine the quantitative relationship between the two values, because of computational speed depends on CPU pipeline CPU performance in all aspects of target (cache, instruction set, CPU of the median and so on). Frequency is not directly represented because of computational speed, therefore, under certain circumstances, it is possible there will be a higher frequency of the CPU speed lower the actual situation. Such as AMD's AthlonXP series of CPU most of all have a lower frequency, to Intel's Pentium 4 series CPU higher frequency of the CPU performance, so to AthlonXP series CPU only PR value named. CPU frequency is therefore only one aspect of performance, while the CPU does not mean that the overall performance.
CPU does not mean that the frequency of the CPU speed, but increase the CPU frequency to improve computation speed is critical. For example, assume that a CPU in an implementation of a computing instructions per clock cycle, then when the CPU when running at 100MHz frequency, it will run at 50MHz clock speed twice as fast. Since more than 100MHz of the clock cycle of 50MHz clock cycle time reduced by half occupied, that is, the work of the CPU frequency at 100MHz implementation of a computing instruction time job is only 10ns at 50MHz frequency than when the shorter half of 20ns, natural computing doubled the speed of it quickly. Only the overall computer speed depends not only on the CPU to run faster, but also with other operation of the various sub-systems, and only improve at the same time frequency, the various sub-systems and the various sub-operating speed of data transmission speed between the can be improved, the overall computer speed can really be improved.
Improve job GHz CPU mainly by restrictions on the production process. Since the CPU is manufactured on the semiconductor silicon, silicon-on components in between the wires necessary to connect, because of state requirements in the high-frequency finer wires as short as possible in order to reduce stray capacitance wire interference distribution in order to ensure CPU computing right. Manufacturing process, therefore the restrictions are CPU frequency, one of the biggest obstacles to development.