Fujitsu Corporation

Kensuke Watanabe

Koichiro Yamashita

Hiromasa Yamauchi

Takahisa Suzuki

Koji Kurihara

Masatoshi Haraguchi

Shun Kamatsuka

Yasunobu Tanimura

A compiler program causes a computer to execute optimization processing for an optimization target program. The optimization target program includes a loop including a vector store instruction and a vector load instruction for an array variable. The optimization processing includes (1) unrolling the vector store instruction and the vector load instruction in the loop by an unrolling number of times to generate a plurality of unrolled vector store instructions and a plurality of unrolled vector load instructions, and (2) scheduling to move an unrolled vector load instruction among the plurality of unrolled vector load instructions, which is located after a first unrolled vector store instruction that is located at first among the plurality of unrolled vector load instructions, before the first unrolled vector store instruction.

Compiler program, compiling method, information processing device

A memory access controller includes a semiconductor circuit configured to classify into a first group of cores having made an exclusive access request to shared memory and a second group of cores not having made an exclusive access request to the shared memory, multiple cores capable of accessing the shared memory; detect a core having completed the exclusive access among the first group of cores; and send to a core among the first group of cores and standing by for the exclusive access, a notification of release from a standby state, when detecting a core having completed the exclusive access.

Memory access controller, multi-core processor system, memory access control method, and computer product

Growing community of inventors

Yokohama, Japan

Kensuke Watanabe