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 17% for write with over 30% kernel cycles reduced on ICX 160 cores configuration with v6.10-rc4. v1 -> v2: 1. Rebased the patch set to latest v6.10-rc4 and updated the performance results. 2. Updated patch 1 to resolve the bug identified by Mateusz Guzik with rlimit check and ensure allocated fd is greater than start. 3. Updated patch 3 to remove sanity_check directly per the alignment with maintainer Yu Ma (3): fs/file.c: add fast path in alloc_fd() fs/file.c: conditionally clear full_fds fs/file.c: remove sanity_check from alloc_fd() fs/file.c | 46 ++++++++++++++++++++++++---------------------- 1 file changed, 24 insertions(+), 22 deletions(-) base-commit: 6ba59ff4227927d3a8530fc2973b80e94b54d58f -- 2.43.0
