The current state of Huaxin Technology's CPU business, Wang Anran is deeply touched.

In the previous life, AMD also experienced a period of dark i3 seconds of silence.

And now, not to mention Texas Instruments, which stands at the top of the pyramid for a while, even Intel's Pentium II processor and the lowest model Pentium II 266 can also be used by Huaxin Technology's Athlon and Athlon Pro types in full seconds.

There is no way, the manufacturing process is a hard injury, and no matter how fast the car runs, it can't be compared with an airplane.

For example, in terms of CPU cache, the L1 cache of the Intel Pentium II processor is 32kb, and the L2 cache is 512kb.

The highest-end Athlon-proCPU has a special 12kb first-level tracking cache on the first-level cache because of the manufacturing process, and the second-level cache is only a pitiful 128kb.

Therefore, Intel's CPU can squander the CPU's cache resources unscrupulously, while the Athlon CPU has to be budget-conscious.

However, no matter how careful you are, you can't keep up with other people's wealth, and the warehouse is three or four times larger than you, even if it is stacked indiscriminately, it is much larger than you.

Fortunately, the CPU cache is not simply a size, and there are two major indicators for evaluating the efficiency of the cache, one is whether the goods stored in the warehouse are effective, and you transport garbage in, even if the warehouse is larger than the performance, there is no gain.

The second is whether the goods can be brought out at the first time, which is the problem of hit rate.

In the early stage of branch prediction, the accuracy rate is about 60%, and after multiple misses, the CPU performance will be significantly reduced.

The super castrated TAGE branch provided by Huaxin Technology to Texas Instruments can predict a hit rate of 75%, which is much higher than Intel's current TYOP technology.

And Huaxin Technology itself, naturally not handing over all the guys who eat to Texas Instruments, teaching the apprentices, starving the master, Wang Anran is still very clear about this truth.

Huaxin Technology's Athlon™ Pro, the hit rate of data loading and branch prediction can reach 90%.

Coupled with an optimized instruction set architecture, it is like a sports car with a rocket engine, even if it can't catch up with the speed of an airplane, it is not very far behind.

However, there is no fist product, which always gives people the impression that the technology is weak, but fortunately, Texas Instruments has opened a window for Huaxin Technology to open 500nm and 180nm manufacturing process foundry business to Huaxin Technology.

Under the guidance of Wang Anran, the CPU business department with independent research and development capabilities has made rapid progress, and Wang Anran has just received a call from Rebus.

The Athlon-2 based on the 500-nanometer manufacturing process and the Venomon processor based on the 180-nanometer manufacturing process have both entered the finalization stage before tape-out production.

"It's only been three months, so it's not too rushed!"

"Mr. Wang, it's hard to say, so you have to come and check it. ”

Wang Anran originally planned to take half a year, but now the design progress has been increased by half.

Is it a good thing? Not necessarily.

The Intel Pentium processor is a case in point.

For a processor that was released in a hurry, the quality cannot be guaranteed.

When the problem erupts, it will definitely be a disaster for a company like Huaxin Technology that lacks foundation.

Therefore, Wang Anran was not happy.

You must know that the architecture of the second generation of Athlon CPU has a revolutionary change with the Athlon generation.

The first is to further explore the potential of the pipeline, and the depth of the entire pipeline has reached 20 levels, which raises a new height in CPU design.

It is important to know that increasing the depth of the pipeline can significantly improve the main frequency and execution speed, but in terms of efficiency, if there is no good design, it will often be greatly reduced.

Wang Anran has a profound experience of this.

The genuine Speeddragon Hanging Beat Ben Four is an example.

"I need all the technical information of Athlon II. ”

Half an hour later, technical leaders Gu Liang and Rebus Lianyi entered Wang Anran's office.

Gu Liang was holding a disc and something that looked like a lighter, which immediately attracted Wang Anran's attention.

"USB drive development successful?"

"We already have samples, and so far, there is no problem with using them. ”

"How much capacity?"

“8M。 ”

This capacity is completely chicken, and before the 3D stacking comes out, the current production process can only be like this.

"Mr. Wang, this is the driver, you have to install the driver first, and the computer can recognize and use it. ”

"USB storage drivers can be integrated into the system. ”

"How's the speed?"

"The maximum read speed can reach 4 m/s, and the maximum write speed can reach 1.2 m/s. ”

Wang Anran shook his head, this speed is miserable, but fortunately, the capacity is small, and I don't feel that the speed is slow, if the capacity reaches the G level, at this speed, copying a large file, wouldn't it be a pain to wait.

Fortunately, this is just the beginning.

The full set of data has more than 500M data, which is naturally not packed in a small USB flash drive, and the disc is out of the driver, which is naturally the information that Wang Anran needs.

Gu Liang and Rebus sat quietly on the side.

As a senior CPU architecture engineer, Wang Anran knows very well that the key to CPU chip design is?

In fact, hardware, to put it bluntly, is a fixed-line program, which uses transistors as the most basic unit to form logic gate circuits, and then integrates the designed hardware programs with circuits.

The key to check is whether there is a problem in the upper logic and whether there is an error in the circuit at the lower level.

There is no need to check the lower circuit, there are more than 10 million transistors, the task of verification is heavy, and the technical difficulty is low.

In the upper logic, the implementation mechanism of the computing unit, the processing process of the logic unit, the composition of the instruction set, the processing of branches, the decision writeback mechanism of registers, data exchange, interrupts, etc., are mainly examined......

In EDA software, there is a specific programming language to describe this.

Ten minutes, half an hour, an hour, three hours......

To Wang's surprise, he didn't even pick a thorn.

Even with a magnifying glass, I didn't find it.

What surprised him even more was that in the memory data exchange, the R&D personnel of the CPU division actually added a computing unit similar to memory processing.

According to this design, after the continuous failure of branch prediction, the computer will write the processing mechanism of this type of program to the memory integrated on the CPU, and automatically load it into the CPU L2 cache when the computer starts, reserving 16kb of logical space to set the forward and backward mechanism with counters.

This set of technology, Wang Anran has not prompted it!

"Who designed this one?"

Fu Yan put forward the idea, everyone thinks that this method can improve the accuracy of prediction in a specific environment, so it is adopted. ”

Wang Yiran nodded, who said that China has no talents, as long as you have confidence, abandon the idea of foreign slaves licking dogs, even in the semiconductor industry, dignified China can make foreigners look sideways.

"Reward, must be rewarded!"

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