JP2003099161A - Activation system for information processing system - Google Patents

Abstract

(57) [Problem] To provide a start-up system of an information processing system in which the load of an inrush current at the time of power-on is distributed with a simple configuration and the start-up time of the system is minimized. A plurality of information processing units 24-1, 24 are provided.
2,..., 24-n in the information processing system, a current consumption measuring means 12 for measuring a current consumption value of the information processing system, and a current consumption value of the information processing system outputted by the current consumption measuring means 12 Consumption current storage means 16 for storing the current consumption value in a predetermined cycle, a consumption current comparison means 17 for comparing the consumption current value outputted by the consumption current measuring means 12 with the consumption current value outputted by the consumption current storage means 16, Each unit 2 based on the comparison result by the means 17
4-1, 24-2,..., 24-n.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boot system for an information processing system, and more particularly to a boot system for an information processing system that minimizes boot time.

[0002]

2. Description of the Related Art Generally, in order to prevent a situation in which an LSI in a system fails or a power supply device fails due to an overcurrent flowing in a power supply device or a power supply source of a system, Equipped with current protection circuit.
When the overcurrent is detected, the overcurrent protection circuit is configured to stop the supply of the current, or to prevent the supply of a current value equal to or more than a predetermined current value.

On the other hand, in general, an electronic component typified by a microprocessor or a memory has a large inrush current or a large inrush current as compared with a steady state immediately after the power is turned on or at the moment when the reset state is released and the operation is started. Transient current flows.

In such a case, the above-mentioned overcurrent protection circuit operates and the current is not normally supplied, so that a problem such as a system stop occurs.

Conventionally, for example, the following method has been proposed as a method for preventing the system from going down due to an inrush current at the time of starting.

According to the first method, an information processing unit constituting the information processing system is activated at a constant cycle, and its configuration is shown in FIG. As an example, there are five information processing units.

In FIG. 5, information processing units 24-2
8, current supply means 19 to 23 for supplying a current to each of the information processing units 24 to 28 are connected,
The start control means 15 and the current supply means 19 to 23 are connected by the first to fifth current supply control signals to instruct the current supply means 19 to 23 whether or not to supply the current. There is. Furthermore, the clock signal generating means 18
Notifies the activation control means of a fixed period.

On the other hand, FIG. 6 shows a time chart when each of the information processing units 24 to 28 of the above-mentioned information processing system is activated at a constant cycle.

In FIG. 6, the clock signal as shown in FIG. 2 (a), which is the output of the clock signal generating means 18, becomes a "HIGH" (hereinafter referred to as "H") level at every constant period T. Therefore, the activation control means 15 is informed of the constant period. Further, the first to fifth current supply control signals indicate "supply stop instruction" in the initial state. Here, when the system start instruction signal is changed from the “stop instruction” to the start instruction by turning on the switch 13,
The clock signal of the activation control means 15 is "LOW".
Every time it changes from (hereinafter referred to as “L”) to “H”, the first current supply control signal, the second current supply control signal, the third current supply control signal, the fourth current supply control signal, the fifth current supply control In the order of the signals, change from "supply stop" to "supply". Subsequently, the current supply means 19 to 23 supply operating currents to the information processing units 24 to 28 via the first to fifth distribution lines.
Therefore, since the current supply times of the information processing units 24 to 28 are different, the inrush current of the entire system becomes smaller than that when the current supply to the information units 24 to 28 is started simultaneously.

In the second method, for example, Japanese Patent Laid-Open No.
00-207069 discloses an automatic power-on system that minimizes the time required for power-on.

FIG. 7 is a schematic block diagram showing an example of the above-mentioned automatic power-on system, which will be described with reference to the drawing.

First, the information processing units 50-1 to 50-1 are connected to the automatic power-on / off device 32 from the service processor 31.
The maximum inrush current value of 50-n and the allowable inrush current value are read in advance. These are the service processor 3
1, the information processing units 50-1 to 50-n are added to a table of configuration information or the like necessary for power control of the information processing units 50-1 to 50-n.

Here, the automatic operation control device 33 turns on the switch SW1 of the distribution board 35, and the automatic power-on / off device 32 which receives the power-on instruction from the service processor 11 causes each of the information processing units 50-1. Power-on instructions are sequentially issued to the power control modules 42 to 50-n from the information processing unit 50-1, for example.
The maximum inrush current value of 0-1 (the past actual value is stored) and the allowable inrush current value of the system are added.

Further, for example, the power supply control module 42 of the information processing unit 50-1 which has received the turn-on instruction reads the total inrush current value of the current system from the current measuring device 36 via the power supply control bus 34, If the sum of that value and the actual maximum inrush current of the own device 50-1 does not exceed the allowable inrush current value of the system, the relay SW2 of the power bulk 41 is made to make the information processing unit 50-1.
Turn on the power. At the same time, the power supply control module 42 notifies the automatic power-on / off device 32 of the power-on completion response of the information processing unit 50-1. Upon receipt of the notification, the automatic power-on / off device 32 similarly sequentially turns on the information processing units, such as 50-2 to 50-n. If the sum of the current values exceeds the allowable inrush current value of the system, wait until the value falls within the allowable current value.

Subsequently, when the total inrush current value of the system becomes equal to or less than the allowable current value, the power-on of the information processing unit 50-1 is completed and the following information is sent to the automatic power-on / off device 32. Processing unit eg 50-
A request to restart the input instruction for any of 2 to 50-n is notified. Therefore, the automatic power on / off device 32
Therefore, the unauthorized waiting time for load distribution of inrush current at power-on is deleted.

[0016]

However, the method of activating at a constant cycle according to the above-mentioned first conventional method is caused by different rush times of the respective information processing units, the influence of surrounding conditions, or individual differences. Due to the influence, it is necessary to consider the variation in the time until the rush current disappears, and if it is adjusted to the longer one, it is necessary to lengthen the fixed period.

When the fixed period is lengthened, the system start-up time becomes a product of the fixed period multiplied by the number of information processing units, so that the system start-up time becomes long.

On the other hand, in the automatic power-on system of the second method, the sum of the total inrush current value, which is the current value of the current, and the actual inrush current value of the information processing unit which is going to turn on the power source is obtained before the power source is turned on. Therefore, there is a problem that an accurate and precise current measuring device is required and the configuration for realizing the information processing system becomes very complicated. Furthermore, it is necessary to store the actual rush current of each information processing unit in the service processor 31 in advance, and if even one of the information processing units fails and is replaced with another information processing unit, the service processor 31 is replaced with the other information processing unit. There was a problem that it was very troublesome because the actual rush current value stored had to be rewritten.

The present invention has been proposed based on the above-mentioned conventional circumstances, in which the load distribution of the inrush current at power-on is performed with a simple structure, the system startup time is short, and the influence of individual differences is exerted. An object is to provide an activation system of an information processing system that does not need to be considered.

[0020]

In order to achieve the above object, the present invention provides an information processing system comprising a plurality of information processing units, wherein the current consumption measuring means measures the current consumption value of the information processing system. And a current consumption storage means for storing the current consumption value of the information processing system output by the current consumption measurement means in a predetermined cycle, the current consumption value output by the current consumption measurement means, and the current consumption storage means output It is characterized in that it is provided with consumption current comparing means for comparing the consumption current value and start control means for turning on the power source corresponding to each unit based on the comparison result by the consumption current comparing means.

According to this structure, the current consumption value of the information processing system including a plurality of information processing units is measured, and the current consumption value is stored in a predetermined cycle to store the current consumption value. It is possible to compare the current consumption value and the stored current consumption value which is the past current consumption value, and sequentially start the information processing units based on the comparison.

Further, in the present invention, the activation control means is
It is characterized in that the power supply for at least one of the information processing units is controlled to be turned on in synchronization with the predetermined cycle.

According to this structure, the information processing unit can be activated in synchronization with a predetermined cycle.

Further, according to the present invention, the start-up control unit controls the start-up control when the current consumption value output by the current consumption measuring unit is smaller than the current consumption value output by the current consumption storage unit. The means is characterized in that the power supplies of the plurality of information processing units are sequentially turned on.

According to this structure, the current consumption value output from the consumption current measuring means is compared with the stored consumption current value which is the past consumption current value, and the current consumption value is decreased. If so, the information processing units can be sequentially activated.

Further, according to the present invention, the current consumption comparing means determines that the current consumption value output by the current consumption measuring means is smaller than the current consumption value output by the current consumption storing means at least twice. The above-mentioned activation control means sequentially turns on the power sources of the plurality of information processing units when the above-mentioned detections are continuously performed.

According to this structure, the current consumption value output by the current consumption measuring means is compared with the stored current consumption value which is the past current consumption value, and the current consumption value is stored twice or more continuously. It is possible to detect that the current consumption value of 1 is decreased and sequentially start the information processing units when the rush current at the time of start is stable.

Further, according to the present invention, in the consumed current comparing means, the consumed current value output by the consumed current measuring means is smaller than the consumed current value output by the consumed current storage means, and both of the above are present. When the difference in current consumption value is larger than a specific threshold value, the activation control means sequentially turns on the power sources of the plurality of information processing units.

According to this structure, the difference between the current consumption value output by the consumption current measuring means and the stored consumption current value which is the past consumption current value is obtained, and when the difference is positive, that is, , When the current consumption value is small, the difference between the current consumption value and the past consumption current value is compared with a threshold value, and it is detected that the difference in the consumption current value is larger than the threshold value. The information processing units can be sequentially activated when the rush current at the time of activation is stable.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. It should be noted that the following embodiment is an example in which the present invention is embodied, and does not limit the technical scope of the present invention. (Embodiment 1) FIG. 1 is a schematic functional block diagram of an information processing system in the present embodiment 1, and FIG. 2 is a time chart showing an operation state of the information processing system.

As shown in FIG. 1, the information processing system according to the present embodiment includes a current supply means 11 for supplying current to the entire information processing system, and a consumption for measuring current consumption of the entire information processing system. Current measuring means 12
And a switch 13 for performing an ON / OFF operation to start the information processing system.

Further, the information processing system operates to the main control means 14 for controlling the activation of the system and the information processing units 24-1, 24-2, ... Current supply means 19-1, 19-2, ...
19-n and the above-mentioned current supply means 19-1, 19-2,
..., information processing units 24-1, 24-2, which perform information processing by receiving operating current supply from 19-n,
24-n.

Further, the main control means 14 for controlling the activation of the system comprises a consumption current storage means 16, a consumption current comparing means 17, and a activation control means 15, and further, each of the means has a clock. It is provided with a clock signal generating means 18 for supplying a signal.

By the way, the supply path of the operating current is as follows. That is, the current supply means 11 of the information processing system supplies the operating current of the entire information processing system via the common distribution line, and the current supply means 19-1, 1
, 9-n are supplied with operating current from the current supply means 11 via a common distribution line. Furthermore, each current supply means 19-1, 19-2, ..., 19
-N is the current supply means 19-1, 19-2, ...
.., 19-n from the start control means 15
Is controlled by the nth current supply instruction signal,
~ When the nth current supply instruction signal is "H", the information processing units 24-1, 24-2, ..., 24 are connected via the respective distribution lines.
-N operating current is supplied, and when the first to nth current supply instruction signals are "L", the information processing units 24-1, 24
Supply of the operating current to -2, ..., 24-n is stopped.

The operation of the system and the above configuration will be described in more detail below with reference to the time chart showing the operating state of the information processing system of FIG.

In FIG. 2, at the time A when the switch 13 is turned "ON", the system activation signal becomes "H" level and the system is activated. The activation control means 15 operates every time the clock signal becomes “H”, recognizes that the system activation signal becomes “H” at time B, and sets the first current supply instruction signal to “H” level. , Activates the current supply means 24-1. Then, the current supply means 1 supplies an operating current to the information processing unit 24-1 via the distribution line to activate the information processing unit 24-1.

By the way, when the information processing unit 24-1 is activated, the consumption current amount of the system measured by the consumption current measuring means 12 is rapidly increased by the inrush current when the information unit 24-1 is activated and then decreased. Turn around,
The operating current becomes stable at the point where it has dropped completely. The above can be said for general equipment using a computer or the like.

In FIG. 2, the information processing unit 24-1
The current consumption value output by the current consumption measuring unit 12 was 40 mA before the start-up, but after the information processing unit 24-1 was started up, it temporarily increased to 230 mA and then decreased to 110 mA. .

That is, since the inrush current value of the information processing unit 1 is a value obtained by subtracting 40 mA from 230 mA,
It becomes 190 mA.

In FIG. 2, the information processing units 24-1 and 24
The number of -2, ..., 24-n is n, but now,
For example, the number of information processing units forming the information processing system is 5, the inrush current is 190 mA, and the allowable current value of the system is 600 mA.

Under the conditions as described above, when all five information processing units are activated at the same time, the inrush current becomes 950 mA, which is a value obtained by multiplying 190 mA by 5.
The current consumption value of the entire information processing system becomes 990 mA, which is a value obtained by adding the current consumption value of 40 mA before activation, exceeds the allowable current value of 600 mA of the system, and causes a failure such as stopping the information system.

Further, the consumption current storage means 16 stores the consumption current value output by the consumption current measuring means 12 every time the clock signal becomes "H", and the consumption current value one cycle past depending on the clock signal. Is output to the current consumption comparison means 17.

Further, the current consumption comparing means 17 has the current current consumption value output by the current consumption measuring means 12 and the current consumption value output by the current consumption storing means 16 which is one week past in terms of the clock signal. To compare. Here, if the current consumption value is smaller than the past current consumption value, that is, if the current consumption has decreased, the current consumption comparison means 17 outputs “H” to the start control means 15, On the contrary, if the current consumption value is larger than the past current consumption value, that is, if the current consumption has increased, "L" is output to the activation control means 15.

On the other hand, at the time of C in FIG. 2, for example, at the fall of the clock signal at the same time, the consumption current value immediately before the maximum value of the inrush current value output by the consumption current measuring means 17 is stored in the consumption current storage means 16. A value of 220 mA is written and the current consumption value is stored. Therefore, at the time of D in FIG.
Since the current consumption measuring means 12 outputs a value smaller than 0 mA, the current consumption comparing means 17 outputs "H" as the comparison result.

At the time of D in FIG. 2, the start control means 1
No. 5 recognizes that the current consumption has decreased because the comparison result of the current consumption comparison means 17 is “H”,
After the information unit 24-1, the information processing unit 24-
To activate No. 2, the second current supply instruction signal is set to "H". In response to the second current supply instruction signal becoming "H", the current supply means 19-2 supplies the operating current to the information processing unit 24-2 through the distribution line, and the information processing unit 24-2. To start. The above operation is performed by the clock signal D
It is done in sync with. In this way, the activation control means 15 sequentially synchronizes with the clock signal, the information processing unit 24-1, the information processing unit 24-2, ...
The information processing unit 24-n is activated.

As described above, the inrush current begins to decrease after passing the peak value and continues to decrease to the steady state. Therefore, the current consumption value of one cycle past and the current consumption current as viewed from the clock signal. By comparing with the value, it can be determined whether the power can be turned on next time.

If the inrush current of one information processing unit is small, for example, when starting the information processing unit 24-2, it is possible to control to start a plurality of information processing units simultaneously. For example, the allowable current of the system 6
If the inrush current of one information processing unit is about 150 mA or less, it is possible to simultaneously activate two or three information processing units.

By the way, when the time width of the clock signal in FIG. 2 is large, when the value of the inrush current is small, the value of the inrush current is taken into the consumption current storage means 16, and the peak value of the inrush current is stored. Sometimes it is difficult. In this case, the time width of the clock signal is narrowed, that is, the cycle of the clock signal is shortened, and the current consumption value output by the current consumption measuring means 12 is sampled.

It is also possible to perform control such that the peak value of the current consumption value is detected from the sampling value of the sampling result and the peak value is stored in the current consumption storage means 16. In this case, as described above, since it is determined whether or not the information processing unit may be activated in synchronization with the clock signal, the activation control means 15 determines the comparison result of the consumed currents at a time corresponding to D in FIG. Since it also becomes faster, it is possible to delay the above determination time by a method as in Embodiments 2 and 3 described later. (Second Embodiment) FIG. 3 is a schematic functional block diagram of the current consumption comparison means 17 in the second embodiment. Only the differences in the configuration from the first embodiment will be described below.

In the first embodiment, the consumed current measuring means 12
When the current consumption value output by the current consumption value is compared with the current consumption value output by the current consumption storage means 16, the comparison result is “H”, that is, the current consumption value output by the current consumption measurement means 12 is consumed. Even when the current consumption value output from the current storage means 16 becomes smaller than the current consumption value, it is possible that the inrush current at the time of start-up has not fallen yet and has not reached the steady state. The second embodiment is proposed assuming the above case.

As shown in FIG. 3, the current consumption comparing means 17
Is provided with a comparator 50, a delay device 51 for delaying one time, and an AND device 52. The output of the delay device 51 is set to the “L” level in the initial state when the information processing system is activated.

Here, after the switch 13 shown in FIG. 1 is turned on and the system start signal goes to the "H" level at time A in FIG. 2 to start the system, the consumption current measuring means 12 shown in FIG. 1 outputs. When the current consumption value to be consumed becomes smaller than the current consumption value output from the current consumption storage means 16 and the output of the comparator 50 constituting the current consumption comparison means 17 becomes the “H” level, that value is input to the delay device 51. To be done. Also,
A signal whose output from the comparator 50 is “H” is used as the write inhibit signal 58, and at the next time, the current consumption value output by the current consumption measuring unit 12 is stored in the current consumption storing unit via the write inhibit signal 58. Prohibit remembering. The value of the input is delayed by one time and appears as the output of the delay device 51. At this time, when the output of the comparator 50 becomes "H" level, both the output of the comparator 50 and the output of the delay device 51 are "H".
It becomes a level. Since both of these signals are input to the AND device 52, the output of the AND device 52 also becomes "H" level. This is equal to the current comparison result of the comparator 50 and 1
Both of the comparison results before the time point indicate that the current consumption value output by the current consumption measurement unit 12 is smaller than the current consumption value output by the current consumption storage unit 16. Also, A
When the output of the ND device 52 becomes "H", the current consumption value which is the output of the current consumption measuring means 12 is newly stored at the next time. Therefore, the content stored in the current consumption storing means 16 is cleared via the clear signal 57. I'll do it. As described above, the comparison result becomes small twice in a row, the "H" signal output from the AND means 52 is input to the activation control means 15, and the activation control means 15 has a current consumption value of two consecutive times. And recognize that it is decreasing. After that, the activation control means 15 detects that the comparison result is small twice in succession, so that the information processing units 24-1, 24, 24- are processed in the same procedure as in the first embodiment.
2, ..., 24-n are sequentially activated and controlled.

The above is the case where the current consumption value output by the current consumption measuring means 12 is smaller than the current consumption value output by the current consumption storing means 16 twice in a row.
In the case of the number of times or more, the number of connection stages of the delay device 51 may be increased. For example, in the case of three times, the number of connection stages of the delay device 51 is two.

With the above arrangement, the current consumption value output by the current consumption measuring means 12 is the current consumption storing means 16
Is smaller than the current consumption value output by the
Current consumption comparing means 17
Sends an "H" level signal to the activation control means 15. That is, the activation control means 15 operates after the time when the current consumption value output from the current consumption measuring means 12 is stored in the current consumption storing means 16 by the number of connection stages of the delay device 51. (Third Embodiment) FIG. 4 is a schematic functional block diagram of the current consumption comparing means 17 in the third embodiment. Only the difference in the configuration from the first or second embodiment will be described below.

As shown in FIG. 4, the current consumption comparing means 17 comprises a comparator 50, a register 53 for storing a threshold value, and a subtractor 54. The threshold value is the current comparison means 1
It is stored in the register 53 provided in the No. 7 in advance. As explained above, the information units 24-1, 2
In 4-2, ..., 24-n, the rush current after start-up starts to decrease after passing the peak value and continues to decrease to the steady state. Therefore, when viewed from the clock signal, one cycle or several weeks worth of past The difference between the current consumption value and the current consumption current value may be monitored to determine whether the power may be turned on next.

After the switch 13 shown in FIG. 1 is turned on and the system activation signal goes to the "H" level at time A in FIG. 2 to activate the system, the consumption current output by the consumption current measuring means 12 shown in FIG. The value is input to the minus input 56 of the subtractor 54, the consumption current value output from the consumption current storage means 16 is input to the plus input 55 of the subtractor 54, the difference between the two inputs is obtained from the subtractor 54, and When the output of the subtractor 54 is positive, that is, when the current consumption value output by the current consumption measuring means 12 is smaller than the current consumption value output by the current consumption storage means 16, the output of the subtractor 54 and the register 53 are stored. The comparator 50 performs comparison with the threshold value. When the difference between the consumption current value output by the consumption current measuring means 12 and the consumption current value output by the consumption current storage means 16 is larger than the threshold value, the consumption current comparing means outputs the "H" level.

Subsequently, the "H" level signal is input to the activation control means 15, and the activation control means 15 recognizes that the consumption current value output from the consumption current measuring means 12 is sufficiently small. Thereafter, the activation control means 15 receives the "H" level signal and processes the information processing units 24-1, 24-2, ..., 24 by the same procedure as in the first embodiment.
-N sequentially controls startup.

As described above, the inrush current after the start of the reduction starts to decrease after passing the peak value and continues to decrease to the steady state. Therefore, the difference between the past consumption current value and the current consumption current value is calculated. As a result of the monitoring, the activation control means 15 can control to turn on the power when the state is closer to the steady state. Further, if the above threshold value is set to a large value, the consumption current storage means 16 stores the consumption current measuring means 12
The start control means 15 performs the control operation after a delay of a plurality of cycles from the time at which the consumption current value, which is the output of, is stored. Furthermore, even if noise is transiently added to the inrush current after startup, the comparator 50 does not respond unless the threshold value is exceeded, so that the influence of noise can be prevented. Further, since the difference between the output current consumption value of the current consumption storage means 16 and the output of the current consumption measurement means 12 is observed, even if both current consumption values are similarly affected by noise, the noise The impact can be reduced.

Further, in the above description, the case where the activation is controlled by supplying the current is described. However, for example, the reset signal (from the current supplying means 19-1, 19-2, ..., 19-n is (Not shown) is an information processing unit 24-1,
It is also possible to supply it to 24-2, ..., 24-n to initialize the information processing units 24-1, 24-2 ,.

[0060]

As described above, according to the first information processing system start-up system of the present invention, the current consumption measuring means for measuring the current consumption of the information processing system and the consumption current value for storing the past current consumption value are stored. Since the current storage means and the consumption current comparison means for comparing the current consumption current and the past consumption current value are provided, a simple calculation of comparing the current consumption current and the past consumption current value, Since it is confirmed that the inrush current generated when activating multiple information processing units that make up the information processing system is small, the information processing units are activated in sequence, so there is an unnecessary waiting time when the information processing system is activated. Can be reduced, and the system startup time can be significantly reduced.

Next, according to the second information processing system start-up system of the present invention, since the current consumption comparing means is provided with the delay device, the current consumption current and the past current consumption value are continuously calculated. Then, it is possible to confirm that the current consumption current is smaller than the past current consumption value continuously, so that the information processing unit can be activated when the inrush current at the time of activation approaches the steady state.

Next, according to the startup system of the third information processing system of the present invention, since the current consumption comparison means is provided with the subtractor, the current consumption value and the past current consumption value are compared. The startup of the information processing unit can be controlled by comparing the difference with the threshold value, so that the information processing unit can be started when the inrush current at startup approaches a more steady state, and the inrush current after startup can also be performed. Even if noise is transiently added to the current, the influence of noise can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic functional block diagram of an information processing system according to a first embodiment of the present invention.

FIG. 2 is a time chart showing an operation state of the information processing system according to the first embodiment of the present invention.

FIG. 3 is a schematic functional block diagram of current consumption comparison means according to the second embodiment of the present invention.

FIG. 4 is a schematic functional block diagram of current consumption comparison means according to a third embodiment of the present invention.

FIG. 5 is a schematic functional block diagram of an information processing system according to a conventional embodiment.

FIG. 6 is a time chart showing an operation state of the information processing system in the conventional embodiment.

FIG. 7 is a functional schematic block diagram of an automatic power-on system according to a conventional embodiment.

[Explanation of symbols]

11 Current supply means for information processing system 12 Current consumption measuring means 15 Starting control means 16 Current consumption storage means 17 Current consumption comparison means 19-1 Current supply means 24-1 Information processing unit

Claims (5)

[Claims] 1. An information processing system comprising a plurality of information processing units, wherein current consumption measuring means for measuring a current consumption value of the information processing system, and consumption of the information processing system output by the current consumption measuring means. A consumption current storing means for storing a current value in a predetermined cycle; a consumption current comparing means for comparing the consumption current value output by the consumption current measuring means with the consumption current value output by the consumption current storage means; An activation system for an information processing system, comprising: an activation control unit that turns on a power source corresponding to each unit based on the comparison result by the comparison unit. 2. The activation system for an information processing system according to claim 1, wherein the activation control means performs control for turning on a power source corresponding to at least one of the information processing units in synchronization with the predetermined cycle. 3. The current consumption comparing means, when the current consumption value output by the current consumption measuring means is smaller than the current consumption value output by the current consumption storing means, the activation control means is configured to control the plurality of the current consumption values. The activation system of the information processing system according to claim 1, wherein the power supply of the information processing unit is sequentially turned on. 4. The current consumption comparing means continuously detects at least twice or more that the current consumption value output by the current consumption measuring means is smaller than the current consumption value output by the current consumption storing means. In this case, the start-up control means turns on the power supplies of the plurality of information processing units sequentially, and the start-up system of the information processing system according to claim 3. 5. The consumption current comparing means has a consumption current value output by the consumption current measuring means smaller than the consumption current value output by the consumption current storing means, and a difference between the consumption current values of the both. 3. The activation system of the information processing system according to claim 1, wherein the activation control unit sequentially turns on the power sources of the plurality of information processing units when the activation threshold value is larger than a specific threshold value.