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Computing power of computer 51

Publish: 2021-04-27 19:18:11
1.

computing power is a measure of bitcoin network processing power. That is, the speed at which the computer calculates the output of the hash function. Bitcoin networks must perform intensive mathematical and encryption related operations for security purposes. For example, when the network reaches a hash rate of 10th / s, it can perform 10 trillion calculations per second

in the process of getting bitcoin through "mining", we need to find its corresponding solution M. for any 64 bit hash value, there is no fixed algorithm to find its solution M. we can only rely on computer random hash collisions. How many hash collisions can a mining machine do per second is the representative of its "computing power", and the unit is written as hash / s, This is called workload proof mechanism pow

< H2 > extended data

computing power provides a solid foundation for the development of big data, and the explosive growth of big data poses a huge challenge to the existing computing power. With the rapid accumulation of big data in the Internet era and the geometric growth of global data, the existing computing power can no longer meet the demand. According to IDC, 90% of the global information data is generated in recent years. And by 2020, about 40% of the information will be stored by cloud computing service providers, of which 1 / 3 of the data has value

therefore, the development of computing power is imminent, otherwise it will greatly restrict the development and application of artificial intelligence. There is a big gap between China and the advanced level of the world in terms of computing power and algorithm. The core of computing power is the chip. Therefore, it is necessary to increase R & D investment in the field of computing power to narrow or even catch up with the gap with the developed countries in the world

unit of force

1 KH / S = 1000 hashes per second

1 MH / S = 1000000 hashes per second

1 GH / S = 1000000000 hashes per second

1 th / S = 100000000000 hashes per second

1 pH / S = 100000000000 hashes per second

1 eh / S = 100000000000 hashes per second

2. In the process of getting bitcoin through "mining", we need to find its corresponding solution M. for any 64 bit hash value, there is no fixed algorithm to find its solution M. we can only rely on computer random hash collisions. How many hash collisions a mining machine can do per second is the representative of its "computing power", and the unit is written as hash / s, This is the so-called proof of work mechanism (POW)
recently, bitcoin's network computing power has entered the era of P computing power (1P = 1024t, 1t = 1024g, 1g = 1024m, 1m = 1024k). In the soaring computing power environment, the arrival of P era means that bitcoin has entered a new stage of arms race. This is the meaning of computing power. I would like to know more about it Please accept)
3. 1. The meaning of CPU calculation once is that CPU performs "bit calculation" once, for example, 2 + 3 = 5, and binary is 0010 + 0011 = 0101. If there are three bits in total, the computer will calculate three times. 2. As for what this number is related to, that is, the higher the CPU frequency, the more the number of operations per unit time
4. There is no way to estimate the total computing power of computers all over the world, because everyone's computers, including CPUs, graphics cards and memory, are different. To calculate the total computing power of the world, I don't think anyone can do it.
5.

computing power refers to computing power, refers to that in the process of getting bitcoin through "mining", we need to find its corresponding solution M. for any 64 bit hash value, there is no fixed algorithm to find its solution M. we can only rely on computer random hash collisions. How many hash collisions can a mining machine do per second, is the representative of its "computing power". The unit is written as hash / s, which is the so-called proof of work mechanism (POW)

6. In fact, people will not let such a thing happen, because once someone controls 51% of the computing power of the whole network, the security and non tamperability of the system will be invalid, then the decentralization system of bitcoin will collapse, and the price of bitcoin will plummet or even return to zero, which is bad news for the participants of the whole network. Therefore, we will spontaneously control the distribution of computing power in the whole network, so as not to let one company dominate. Even when many people find that the computing power of a certain mine is too large, they will take the initiative to withdraw from the mine. Now the most powerful mining pool in the whole network accounts for about 25% of the whole network.
7. There is a binice digital trading platform with formal registration certificate, operation photo taking and supervision mechanism, safe access to gold and formal platform.
8. Bitcoin cash will not have 51% computing power attack. In theory, 51% computing power attack exists, but in practice, it is difficult to work. The reasons are as follows: at present, no single miner can account for more than 50% of the whole BCC network; 51% attack is a kind of technical activity, which is difficult to operate; The cost and benefit of 51% attack are asymmetric, and 51% attack will lead to double spending of transactions. However, most of the trading platforms have implemented strict real name authentication mechanism, which can not be realized in time; Once a miner has the ability to launch a 51% attack, supporters of other large blocks will switch their computing power to Bcc to prevent the occurrence of 51% attack; 51% of attacks will cause temporary confusion on the network, but it is not fatal, and will make the attacker become infamous.
9. Because 51 single-chip microcomputer is 8-bit, it can only be calculated by the maximum 8-bit, that is to say, if it exceeds 8-bit (256), the intermediate value will be stored in the register, so you have a large amount of calculation like you. Some single-chip microcomputers, like 32-bit, just complete a multiplication instruction, while 51 needs many, and in terms of execution time, 51 belongs to low frequency, which is a bit slow, Because 51's instruction execution cycle is relatively slow
10. long unsigned int pp1=0;

is the declaration method wrong? It's signed long int PP1 = 0

is array m [] declarative? You have to perform forced type conversion before operation. Your expression just overflows. For example, m [4] * 6553665536 is 0x10000, which is no longer 16 bit int data. It's strange that there is no error

so try this:

PP1 = (unsigned long) m [0] + (unsigned long) m [1] * 16 + (unsigned long) m [2] * 256 + m [3] * 4096 + (unsigned long) M [4] * 65536 + (unsigned long) m [5] * 1048576;
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