branch prediction

Understanding likely and unlikely in the Linux Kernel

by
Understanding likely and unlikely in the Linux Kernel

In the Linux kernel source code, the keywords likely and unlikely are frequently encountered. Upon examining the source code, it turns out that these two keywords are macros defined in the include/linux/compiler.h file of the kernel source (specifically in linux-3.11.0-rc1): Since CONFIG_PROFILE_ALL_BRANCHES is not defined, the definitions of the two macros are as follows: # … Read more

Breaking the Norm with a RISC-V Chip

by
Breaking the Norm with a RISC-V Chip

(Source: chipsandcheese)Condor Computing is a subsidiary of Andes Technology, dedicated to developing licensable RISC-V cores, with a business model similar to that of Arm and SiFive. Andes Technology established Condor in 2023, making it relatively young in the RISC-V field. However, Andes Technology had RISC-V design experience prior to the establishment of Condor and has … Read more