d991fcb3b6
- Avoid atomics in more places. - Remove the per-descriptor mutex, and just use filedesc_t::fd_lock. It was only being used to synchronize close, and in any case we needed to take fd_lock to free the descriptor slot. - Optimize certain paths for the <NDFDFILE case. - Sprinkle more comments and assertions. - Cache more stuff in filedesc_t. - Fix numerous minor bugs spotted along the way. - Restructure how the open files array is maintained, for clarity and so that we can eliminate the membar_consumer() call in fd_getfile(). This is mostly syntactic sugar; the main functional change is that fd_nfiles now lives alongside the open file array. Some measurements with libmicro: - simple file syscalls are like close() are between 1 to 10% faster. - some nice improvements, e.g. poll(1000) which is ~50% faster. |
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|---|---|---|
| .. | ||
| Makefile | ||
| files.svr4_32 | ||
| sed.script | ||
| svr4_32_acl.h | ||
| svr4_32_dirent.h | ||
| svr4_32_exec.c | ||
| svr4_32_exec.h | ||
| svr4_32_exec_elf32.c | ||
| svr4_32_fcntl.c | ||
| svr4_32_fcntl.h | ||
| svr4_32_filio.c | ||
| svr4_32_fuser.h | ||
| svr4_32_hrt.h | ||
| svr4_32_ioctl.c | ||
| svr4_32_ioctl.h | ||
| svr4_32_ipc.c | ||
| svr4_32_ipc.h | ||
| svr4_32_lwp.c | ||
| svr4_32_lwp.h | ||
| svr4_32_misc.c | ||
| svr4_32_mod.c | ||
| svr4_32_net.c | ||
| svr4_32_resource.c | ||
| svr4_32_resource.h | ||
| svr4_32_schedctl.c | ||
| svr4_32_schedctl.h | ||
| svr4_32_siginfo.h | ||
| svr4_32_signal.c | ||
| svr4_32_signal.h | ||
| svr4_32_socket.c | ||
| svr4_32_socket.h | ||
| svr4_32_sockio.c | ||
| svr4_32_sockio.h | ||
| svr4_32_stat.c | ||
| svr4_32_stat.h | ||
| svr4_32_statvfs.h | ||
| svr4_32_stream.c | ||
| svr4_32_stropts.h | ||
| svr4_32_syscall.h | ||
| svr4_32_syscallargs.h | ||
| svr4_32_syscalls.c | ||
| svr4_32_sysent.c | ||
| svr4_32_termios.c | ||
| svr4_32_termios.h | ||
| svr4_32_time.h | ||
| svr4_32_timod.h | ||
| svr4_32_types.h | ||
| svr4_32_ucontext.h | ||
| svr4_32_ustat.h | ||
| svr4_32_util.h | ||
| syscalls.conf | ||
| syscalls.master | ||