pts/blogbench-1.1.0 is a benchmark designed to replicate the load of a real-world busy file server by multiple threads of random reads, writes, and rewrites. When running default configuration with multiple parallel threads, hot spin lock contention is observed from alloc_fd(), file_closed_fd() and put_unused_fd() around file_lock. These 3 patches are created to reduce the critical section of file_lock in alloc_fd() and close_fd(). As a result, pts/blogbench-1.1.0 has been improved by 32% for read and 15% for write with over 30% kernel cycles reduced on ICX 160 cores configuration with v6.8-rc6. Yu Ma (3): fs/file.c: add fast path in alloc_fd() fs/file.c: conditionally clear full_fds fs/file.c: move sanity_check from alloc_fd() to put_unused_fd() fs/file.c | 27 ++++++++++++++++----------- 1 file changed, 16 insertions(+), 11 deletions(-) -- 2.43.0
