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09bdec20a0
freebsd-skq/sys/kern
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Mateusz Guzik 09bdec20a0 locks: slightly depessimize lockstat 
The slow path is always taken when lockstat is enabled. This induces
rdtsc (or other) calls to get the cycle count even when there was no
contention.

Still go to the slow path to not mess with the fast path, but avoid
the heavy lifting unless necessary.

This reduces sys and real time during -j 80 buildkernel:
before: 3651.84s user 1105.59s system 5394% cpu 1:28.18 total
after: 3685.99s user 975.74s system 5450% cpu 1:25.53 total
disabled: 3697.96s user 411.13s system 5261% cpu 1:18.10 total

So note this is still a significant hit.

LOCK_PROFILING results are not affected.
2018-03-17 19:26:33 +00:00
..
bus_if.m
capabilities.conf allow posix_fallocate in capability mode 2017-10-12 15:45:53 +00:00
clock_if.m
cpufreq_if.m
device_if.m Teach makeobjops.awk to accept PROLOG and EPILOG blocks before 2017-12-31 09:23:19 +00:00
genassym.sh Don't prefix zero with 0x in assym.s. 2017-04-13 15:43:44 +00:00
imgact_aout.c Use C99 designated initializers for struct execsw 2018-03-13 13:09:10 +00:00
imgact_binmisc.c Use C99 designated initializers for struct execsw 2018-03-13 13:09:10 +00:00
imgact_elf32.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
imgact_elf64.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
imgact_elf.c Use C99 boolean type for translate_osrel 2018-03-13 16:40:29 +00:00
imgact_gzip.c Use C99 designated initializers for struct execsw 2018-03-13 13:09:10 +00:00
imgact_shell.c Use C99 designated initializers for struct execsw 2018-03-13 13:09:10 +00:00
inflate.c SPDX: use the Beerware identifier. 2017-11-30 20:33:45 +00:00
init_main.c Use per-domain locks for vm page queue free. Move paging control from 2018-02-06 22:10:07 +00:00
init_sysent.c Regen after r330517. 2018-03-05 17:02:50 +00:00
kern_acct.c spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
kern_alq.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_clock.c make SW_WATCHDOG dynamic 2018-01-03 00:56:30 +00:00
kern_clocksource.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_condvar.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_conf.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_cons.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
kern_context.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_cpu.c Revert r327828, r327949, r327953, r328016-r328026, r328041: 2018-01-21 15:42:36 +00:00
kern_cpuset.c Copyout a whole int to cpuset_domain's policy pointer. 2018-03-09 00:50:40 +00:00
kern_ctf.c Revert r327828, r327949, r327953, r328016-r328026, r328041: 2018-01-21 15:42:36 +00:00
kern_descrip.c Use long for the last argument to VOP_PATHCONF rather than a register_t. 2018-01-17 22:36:58 +00:00
kern_dtrace.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_dump.c make SW_WATCHDOG dynamic 2018-01-03 00:56:30 +00:00
kern_environment.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_et.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_event.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_exec.c exec_map_first_page: fix an inverse condition introduced in r254138 2018-02-07 21:51:59 +00:00
kern_exit.c Reduce contention on the proctree lock during heavy package build. 2018-02-20 02:18:30 +00:00
kern_fail.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_ffclock.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_fork.c Reduce contention on the proctree lock during heavy package build. 2018-02-20 02:18:30 +00:00
kern_hhook.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_idle.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_intr.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_jail.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_khelp.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_kthread.c Instrument thread creations for the the benefit of the TSLOG framework. 2017-12-31 09:24:11 +00:00
kern_ktr.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_ktrace.c Decode kevent structures logged via ktrace(2) in kdump. 2017-11-25 04:49:12 +00:00
kern_linker.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_lock.c lockmgr: save on sleepq when cmpset fails 2018-03-05 00:30:07 +00:00
kern_lockf.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
kern_lockstat.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_loginclass.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_malloc.c Fix boot_pages exhaustion on machines with many domains and cores, where 2018-02-09 04:45:39 +00:00
kern_mbuf.c Implement NUMA support in uma(9) and malloc(9). Allocations from specific 2018-01-12 23:25:05 +00:00
kern_mib.c Make v_wire_count a per-cpu counter(9) counter. This eliminates a 2018-02-12 22:53:00 +00:00
kern_module.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_mtxpool.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_mutex.c locks: slightly depessimize lockstat 2018-03-17 19:26:33 +00:00
kern_ntptime.c
kern_osd.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_physio.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_pmc.c Revert r327828, r327949, r327953, r328016-r328026, r328041: 2018-01-21 15:42:36 +00:00
kern_poll.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_priv.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_proc.c Don't generate data in sysctl_out_proc unless we intend to copy out. 2018-02-25 15:16:58 +00:00
kern_procctl.c Kill all descendants of the reaper, even if they are descendants of a 2017-11-23 11:25:11 +00:00
kern_prot.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
kern_racct.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_rangelock.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_rctl.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_resource.c Always use atomic_fetchadd() when updating per-user accounting values. 2018-01-04 22:07:58 +00:00
kern_rmlock.c Clean up the SYSINIT_FLAGS definitions for rwlock(9) and rmlock(9). 2017-11-21 14:59:23 +00:00
kern_rwlock.c locks: slightly depessimize lockstat 2018-03-17 19:26:33 +00:00
kern_sdt.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_sema.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_sendfile.c Dequeue wired pages lazily. 2018-02-07 16:57:10 +00:00
kern_sharedpage.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_shutdown.c Return E2BIG if we run out of space writing a compressed kernel dump. 2018-03-08 17:04:36 +00:00
kern_sig.c Make killpg1 perform process validity checks without proc lock held. 2018-02-20 10:52:07 +00:00
kern_switch.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_sx.c locks: slightly depessimize lockstat 2018-03-17 19:26:33 +00:00
kern_synch.c Allow pause_sbt() to catch signals during sleep by passing C_CATCH flag. 2018-03-03 18:36:38 +00:00
kern_syscalls.c Reduce duplication in dynamic syscall registration code. 2018-02-20 18:08:57 +00:00
kern_sysctl.c Slightly bump the maximum OID path for loading tunable SYSCTLs. 2018-02-02 12:42:46 +00:00
kern_tc.c Use atomic_load(9) to read ppsinfo sequence numbers. 2017-12-19 10:05:45 +00:00
kern_thr.c Implement 'domainset', a cpuset based NUMA policy mechanism. This allows 2018-01-12 22:48:23 +00:00
kern_thread.c Implement 'domainset', a cpuset based NUMA policy mechanism. This allows 2018-01-12 22:48:23 +00:00
kern_time.c nanosleep(2): Fix bogus incrementing of rmtp by tc_tick_sbt on [EINTR]. 2018-02-14 18:43:50 +00:00
kern_timeout.c Remove some, but not all, assumptions that the BSP is CPU 0 and that CPUs 2017-11-25 23:41:05 +00:00
kern_tslog.c Code for recording timestamps of events, especially function entries/exits. 2017-12-31 09:21:01 +00:00
kern_umtx.c Use umtx_copyin_umtx_time32() in __umtx_op_lock_umutex_compat32(). 2018-03-06 01:52:04 +00:00
kern_uuid.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
kern_xxx.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
ksched.c spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
link_elf_obj.c Ignore relocation tables for non-memory-resident sections. 2018-02-05 23:35:33 +00:00
link_elf.c Do pass removing some write-only variables from the kernel. 2017-12-25 04:48:39 +00:00
linker_if.m
Make.tags.inc
Makefile Don't use an .OBJDIR for 'make sysent'. 2018-01-29 19:14:15 +00:00
makesyscalls.sh makesyscalls: permit a range of syscall numbers for UNIMPL 2018-01-30 18:29:38 +00:00
md4c.c SPDX: some uses of the RSA-MD license. 2017-12-13 16:30:39 +00:00
md5c.c
msi_if.m
p1003_1b.c spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
pic_if.m
posix4_mib.c spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
sched_4bsd.c Implement 'domainset', a cpuset based NUMA policy mechanism. This allows 2018-01-12 22:48:23 +00:00
sched_ule.c Restore UP build. 2018-02-23 18:26:31 +00:00
serdev_if.m
stack_protector.c
subr_acl_nfs4.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_acl_posix1e.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_autoconf.c Instrument "boot holds" for the benefit of the TSLOG framework. These 2017-12-31 09:23:52 +00:00
subr_blist.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
subr_bufring.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_bus_dma.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_bus.c Fix LINT build after r328508, add forgotten part in format string 2018-01-29 02:29:08 +00:00
subr_busdma_bufalloc.c Implement NUMA support in uma(9) and malloc(9). Allocations from specific 2018-01-12 23:25:05 +00:00
subr_capability.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_clock.c Replace the existing print_ct() private debugging function with a set of 2018-02-12 16:25:56 +00:00
subr_compressor.c Fix the test for SET_FOREACH termination. 2018-02-15 17:35:40 +00:00
subr_counter.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_devmap.c o Replace __riscv__ with __riscv 2017-08-07 14:09:57 +00:00
subr_devstat.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_disk.c SPDX: use the Beerware identifier. 2017-11-30 20:33:45 +00:00
subr_dummy_vdso_tc.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_eventhandler.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_fattime.c Use const pointers for input data not modified by clock utility functions. 2018-02-06 22:17:01 +00:00
subr_firmware.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_gtaskqueue.c subr_gtaskqueue: Fix braino from r330715 2018-03-10 01:53:42 +00:00
subr_hash.c Unsign some values related to allocation. 2018-01-22 02:08:10 +00:00
subr_hints.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_intr.c Fix compile error with option DEBUG. This is fallout from some long-ago 2017-08-16 16:51:55 +00:00
subr_kdb.c KDB: restart only CPUs stopped by KDB 2018-01-18 07:38:54 +00:00
subr_kobj.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_lock.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_log.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
subr_mchain.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
subr_module.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_msgbuf.c Do pass removing some write-only variables from the kernel. 2017-12-25 04:48:39 +00:00
subr_param.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
subr_pcpu.c Make v_wire_count a per-cpu counter(9) counter. This eliminates a 2018-02-12 22:53:00 +00:00
subr_pctrie.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_pidctrl.c Add a generic Proportional Integral Derivative (PID) controller algorithm and 2018-02-23 22:51:51 +00:00
subr_power.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_prf.c Use the TSLOG framework to record entry/exit timestamps for DELAY and 2017-12-31 09:24:41 +00:00
subr_prof.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
subr_rman.c
subr_rtc.c Fix bad indentation. Whitespace only, no functional changes. 2018-02-13 17:38:08 +00:00
subr_sbuf.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_scanf.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
subr_sfbuf.c Remove SFBUF_OPTIONAL_DIRECT_MAP and such hacks, replacing them across the 2018-01-19 17:46:31 +00:00
subr_sglist.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
subr_sleepqueue.c Do pass removing some write-only variables from the kernel. 2017-12-25 04:48:39 +00:00
subr_smp.c Use resume_cpus() instead of restart_cpus() to resume from ACPI suspension. 2017-12-21 09:17:48 +00:00
subr_stack.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_syscall.c spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
subr_taskqueue.c Revert r327828, r327949, r327953, r328016-r328026, r328041: 2018-01-21 15:42:36 +00:00
subr_terminal.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_trap.c spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
subr_turnstile.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_uio.c MIPS: Implement fue*word* and casueword* in assembly. 2018-03-12 22:10:06 +00:00
subr_unit.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
subr_vmem.c Fix three miscalculations in amount of boot pages: 2018-02-07 18:32:51 +00:00
subr_witness.c Use per-domain locks for vm page queue free. Move paging control from 2018-02-06 22:10:07 +00:00
sys_capability.c Fix broken assertion in r329520. 2018-02-18 20:04:39 +00:00
sys_generic.c kern/sys_generic.c: style(9) return(foo) -> return (foo) 2018-02-24 01:15:33 +00:00
sys_pipe.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
sys_procdesc.c Fix reaping on process fd close broken after r329449 2018-02-20 20:19:38 +00:00
sys_process.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
sys_socket.c Ensure that the vnet is set when calling pru_sockaddr() and 2018-01-11 20:26:17 +00:00
syscalls.c Regen after r330517. 2018-03-05 17:02:50 +00:00
syscalls.master Remove remenants of 1990s efforts to let us run Net/OpenBSD binaries. 2018-03-05 17:02:16 +00:00
systrace_args.c Regenerate auto-generated files 2018-01-12 23:06:35 +00:00
sysv_ipc.c sysv_{ipc|shm}: update the NetBSD VCS tags to match nearer our files. 2017-12-31 03:34:00 +00:00
sysv_msg.c Rename kernel-only members of semid_ds and msgid_ds. 2018-03-02 22:10:48 +00:00
sysv_sem.c Rename kernel-only members of semid_ds and msgid_ds. 2018-03-02 22:10:48 +00:00
sysv_shm.c Correct/improve the descriptions if kern.ipc.(shmsegs,sema,msqids). 2018-02-18 19:19:36 +00:00
tty_compat.c Use the stack for temporary storage in OTIOCCONS. 2018-03-12 23:04:42 +00:00
tty_info.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
tty_inq.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
tty_outq.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
tty_pts.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
tty_tty.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
tty_ttydisc.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
tty.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
uipc_accf.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
uipc_debug.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
uipc_domain.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
uipc_mbuf2.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
uipc_mbuf.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
uipc_mbufhash.c
uipc_mqueue.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
uipc_sem.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
uipc_shm.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
uipc_sockbuf.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
uipc_socket.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
uipc_syscalls.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
uipc_usrreq.c Forgot to sort here in r328238. 2018-01-22 02:26:10 +00:00
vfs_acl.c Reduce duplication in __acl_*_(file|link). 2018-02-15 21:24:43 +00:00
vfs_aio.c Don't store shadow copies of per-process AIO limits. 2018-01-10 21:18:46 +00:00
vfs_bio.c Move the dirty queues inside the per-domain structure. This resolves a bug 2018-03-17 18:14:49 +00:00
vfs_cache.c Plug a name cache lock leak. 2017-12-01 22:51:02 +00:00
vfs_cluster.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
vfs_default.c Include error number in the "fsync: giving up on dirty" message 2018-02-23 21:57:10 +00:00
vfs_export.c Reverse the check to allocate the buffer if cached pointer is NULL. 2017-12-23 17:55:19 +00:00
vfs_extattr.c Reduce duplication in extattr_*_(file|link) syscalls. 2018-02-05 19:06:34 +00:00
vfs_hash.c sys/kern: adoption of SPDX licensing ID tags. 2017-11-27 15:20:12 +00:00
vfs_init.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
vfs_lookup.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
vfs_mount.c Use EVENTHANDLER_DIRECT_INVOKE for [un]mount events, for better performance. 2018-01-07 18:07:22 +00:00
vfs_mountroot.c Make root mount timeout logic work for filesystems other than ufs. 2018-03-10 22:07:57 +00:00
vfs_subr.c Further parallelize the buffer cache. 2018-02-20 00:06:07 +00:00
vfs_syscalls.c Use long for the last argument to VOP_PATHCONF rather than a register_t. 2018-01-17 22:36:58 +00:00
vfs_vnops.c sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
vnode_if.src Use long for the last argument to VOP_PATHCONF rather than a register_t. 2018-01-17 22:36:58 +00:00