Loongson processor is a made in China with independent property rights. The new generation of Loongson processors -- Loongson 3A4000 series will be released on December 24. Is is an improved version of Loongson 3A3000 series.
According to previous reports, the Loongson 3A4000 processor is still using the 28nm process, the frequency has been increased from 1.5GHz of the Loongson 3A3000 to 2.0GHz, the architecture has been upgraded to GS464V, and the matching chipset has also been upgraded to the Loongson 7A2000, 28nm process.
So how big is the performance improvement of the Loongson 3A4000 processor after the improvement? In fact, Loongson officially announced the performance level of the Loongson 3A4000 long ago.
Dr. Hu Weiwu, Chief Architect of Loongson, introduced the performance test of Loongson 3A4000 processor in the journal earlier this year. The test was performed on the FPGA simulation platform. The main frequency of the simulation 3A4000 and 3A3000 is 1GHz and the memory controller frequency is 500 MHz, the result is as follows:
Judging from the results, under the same main frequency, Loongson 3A4000 is 48.54% higher in fixed-point performance and 43.77% higher in floating-point performance than 3A3000, and the performance improvement in some tests exceeds 100%.
It should be noted that the above tests have not taken into account the 246-bit vector optimization supported by the Loongson 3A4000 processor. According to the performance test on the X86 platform, the compiler's automatic vectorization optimization can improve the fixed-point performance of the SPECCPU by about 5% and the floating-point performance. Increase by about 15%.
What about the performance level advantage of Loongson 3A3000? Dr. Hu Weiwu also compared the performance of the AMD K10 processor at 1.5GHz. The single-core and quad-core performance at the same frequency are basically at the same level as the K10.
In other words, the Loongson 3A4000 processor ’s IPC performance has exceeded 50% of AMD ’s K10 processor, but the actual frequency of AMD ’s K10 processor is very high. In this regard, there is still a large gap between domestically produced processors. The process performance is The biggest bottleneck.
In addition, the above tests are also compared at the same frequency of 1.5GHz. In fact, the Loongson 3A4000 uses the 28nm process of 3A3000. The optimized frequency is increased from 1.5GHz to 2.0GHz. Under the same process conditions, the performance of Loongson 3A4000 is twice that of 3A3000.
Dr. Hu Weiwu said that on this basis, if the more advanced process technology is used to increase the main frequency to 2.5 ~ 3.0GHz, the general processing performance of Loongson CPU can reach the level of the international mainstream CPU.
According to Loongson’s official roadmap, Loongson 3A4000 will be followed by Loongson 3A5000 (the server version is Loongson 3B5000), which is still a 4-core or 16-core GS464V architecture, but the process technology is upgraded to 12nm and the frequency is increased to 2.5GHz. It can really reach the level that mainstream desktop processors can use, and this time will probably wait until 2020.
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