New generation Java garbage collection tool: ZGC
JavaZGCZGC ZGCThe Z Garbage CollectorTBZGC JDK 11 JDK 15 Production ReadyZGC"Z"ZZGC ZFSZFSZFS Zettabyte File SystemJeff Bonwick Oracle ZGCZGC2018Oracle ZGC TB GC 10ms G1 15%202211Oracle ZGClive-set root-set TB 8MB-16TB ZGCZGC 10ms 2018 ZGCConcurrentTracing: CompactingSingle generation: Region-basedRegionNUMA-awareNUMANon-Uniform Memory AccessLoad barriersColored pointers2022 ZGCConcurrentRegion-basedRegionCompactingNUMA-awareNUMANon-Uniform Memory AccessUsing colored pointersUsing load barriers 2018 2022 ZGC Single generation G1G1 Region-based RegionRegionZGC G1ZGC Region-basedRegion-basedZGC G1ZGC Region :Small Region Region 2M 256KMedium Region Region 32M 256K 4MLarge Region Region: 2M 4MBCompactingCompacting ZGC CMSG1"-"NUMANUMANon-Uniform Memory Access CPU CPU CPUUniform Memory Access UMA CPU CPUNUMAUMANUMA ZGC NUMAColored pointersColored pointersJVMGC CMSG1 GC ZGC GC 64 JDK zGlobals_x86.cpp ZGC 31[0 ~ 41] 42-bits 4TB Java[42-45] 4-bits Metadata Bits Marked0Marked1RemappedFinalizable [46-63] 18-bits02[0 ~ 42] 43-bits 8TB Java[43-46] 4-bits Metadata Bits Marked0Marked1RemappedFinalizable [47-63] 17-bits03[0 ~ 43] 44-bits 16TB Java[44-47] 4-bits Metadata Bits Marked0Marked1RemappedFinalizable [48-63] 16-bits0 3 4-bits Marked0Marked1RemappedFinalizable 4Marked01-bitMarked11-bitRemapped1-bitFinalizable1-bitfinalizer Marked0Marked1RemappedZGC Marked0Marked1 RemappedZGC""GCGCLoad barriersLoad barriers JIT just-in-time compilation JVMjavaString n = person...
A plane crashed! Civil Aviation Department Notification Details
Civil Aviation Official NotificationA plane crashed into mud in ZhenjiangConducting investigations in accordance with the law and regulationsAccording to the East China Administration of Civil Aviation, on July 12, 2023, a sports aircraft, the Arrola SA60L/B-10LG, belonging to Yuanjing Flight (Wuxi) Aviation Services Co., Ltd...
What will you watch at the 11th Western China Electric Power Expo? Robot arm, 5G+AI, new display screen unveiled
Articulated robotic arms, like human hands, have elbow joints and are adept at replacing manual handling of items in narrow spaces; A transparent new type of display screen that can automatically adjust the light transmittance according to the intensity of ambient light. In the future, it can "turn" into a car's windshield...
When making phone calls, try not to press the video call button as there will be additional charges
When making phone calls, we usually pay attention to avoiding additional costs. However, many people may not be aware that the video call buttons on their phones may result in additional charges...
Planes from various countries prefer to take long detours rather than fly over Tibet. What is there over Tibet?
You may not have noticed that China has an airspace, and all planes in the world must deliberately avoid it, even if they take a long detour, they will not easily approach it. Why is this? This area is Tibet, known as the Roof of the World, with an average elevation of more than 4 kilometersIt is one of the most inhospitable places in the world and the largest aviation obstacle in the world...
China's first large-diameter double shield earth pressure combined shield machine started in Guangzhou
On July 13, the first large-diameter double shield earth pressure combined shield machine independently developed by China, "Tiebing Guanghua No. 6", successfully started at the No...
Elderly people trapped by smartphones, please wait for them in the smart age
As of the end of 2021, the number of elderly people aged 60 and above in China has reached 267 million, accounting for 18.9% of the total population...
Biomass "hot melt carbon rich" technology is an emerging technology, how should process design be carried out?
A Brief Introduction to Hard CoreEditor | Brief Introduction to Hard CoreprefaceAs a renewable energy source, biomass has a wide range of resource potential and environmental advantages. Its effective conversion into high value-added products is crucial for achieving sustainable development...
International Agency for Research on Cancer of WHO: Aspartame is a possible carcinogen
The Joint Expert Committee on Food Additives of the International Agency for Research on Cancer, the World Health Organization (WHO) and the Food and Agriculture Organization (FAO) recently released the assessment report on the health impact of sugar free sweetener Aspartame. The International Agency for Research on Cancer cited the "limited evidence" of carcinogenicity to human beings and classified Aspartame as one of the possible carcinogens to human beings...
US regulatory agencies are taking action for the first time! OpenAI officially investigated by FTC: generating false information poses risks
The Federal Trade Commission (FTC) may investigate OpenAI, the developer of the Chatbot ChatGPT, on consumer protection issues.On July 13 local time, CNN reported that the Federal Trade Commission of the United States was investigating whether OpenAI violated consumer protection laws, and asked OpenAI to provide a large number of records about the possibility of its processing personal data, providing inaccurate information to users, and "the risk of damage to consumers (including reputation damage)"...
New service model exposed, black silk short skirt "delivery girl"? One order for two hours, effortlessly earning over 10000 yuan per day
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Foreign media: Musk talked about AI, stating that China is interested in participating in the formulation of international rules and also stating that it is "a bit pro China"
Source: Global NetworkAccording to the Washington Times, Bloomberg and other foreign media reports, American entrepreneur Elon Musk talked about AI, China and other topics when he participated in the "Twitter Spaces" activity on the 12th local time. He stated that China is willing and ready to cooperate with the international community to formulate AI rules...