Andi Kleen
fdfbbd07e9
perf: Add generic transaction flags ...
Add a generic qualifier for transaction events, as a new sample
type that returns a flag word. This is particularly useful
for qualifying aborts: to distinguish aborts which happen
due to asynchronous events (like conflicts caused by another
CPU) versus instructions that lead to an abort.
The tuning strategies are very different for those cases,
so it's important to distinguish them easily and early.
Since it's inconvenient and inflexible to filter for this
in the kernel we report all the events out and allow
some post processing in user space.
The flags are based on the Intel TSX events, but should be fairly
generic and mostly applicable to other HTM architectures too. In addition
to various flag words there's also reserved space to report an
program supplied abort code. For TSX this is used to distinguish specific
classes of aborts, like a lock busy abort when doing lock elision.
Flags:
Elision and generic transactions (ELISION vs TRANSACTION)
(HLE vs RTM on TSX; IBM etc. would likely only use TRANSACTION)
Aborts caused by current thread vs aborts caused by others (SYNC vs ASYNC)
Retryable transaction (RETRY)
Conflicts with other threads (CONFLICT)
Transaction write capacity overflow (CAPACITY WRITE)
Transaction read capacity overflow (CAPACITY READ)
Transactions implicitely aborted can also return an abort code.
This can be used to signal specific events to the profiler. A common
case is abort on lock busy in a RTM eliding library (code 0xff)
To handle this case we include the TSX abort code
Common example aborts in TSX would be:
- Data conflict with another thread on memory read.
Flags: TRANSACTION|ASYNC|CONFLICT
- executing a WRMSR in a transaction. Flags: TRANSACTION|SYNC
- HLE transaction in user space is too large
Flags: ELISION|SYNC|CAPACITY-WRITE
The only flag that is somewhat TSX specific is ELISION.
This adds the perf core glue needed for reporting the new flag word out.
v2: Add MEM/MISC
v3: Move transaction to the end
v4: Separate capacity-read/write and remove misc
v5: Remove _SAMPLE. Move abort flags to 32bit. Rename
transaction to txn
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1379688044-14173-2-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-10-04 10:06:08 +02:00
idle: Enable interrupts in the weak arch_cpu_idle() implementation
2013-06-14 23:01:05 +02:00
kgdb/sysrq: fix inconstistent help message of sysrq key
2013-04-30 17:04:10 -07:00
perf: Add generic transaction flags
2013-10-04 10:06:08 +02:00
kernel: replace strict_strto*() with kstrto*()
2013-09-12 15:38:03 -07:00
Remove GENERIC_HARDIRQ config option
2013-09-13 15:09:52 +02:00
ACPI and power management fixes for 3.12-rc1
2013-09-12 11:22:45 -07:00
TTY/Serial driver patches for 3.12-rc1
2013-09-03 11:38:36 -07:00
sched/balancing: Fix cfs_rq->task_h_load calculation
2013-09-20 11:59:39 +02:00
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-09-18 11:24:49 -05:00
Not much changes for the 3.12 merge window. The major tracing changes
2013-09-09 14:42:15 -07:00
kernel/hz.bc: ignore.
2013-04-22 07:09:06 -07:00
fs: Fix hang with BSD accounting on frozen filesystem
2013-05-04 14:57:58 -04:00
async: rename and redefine async_func_ptr
2013-03-12 13:59:14 -07:00
audit: fix endless wait in audit_log_start()
2013-09-24 17:00:26 -07:00
audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent audit_names record
2013-07-09 10:33:19 -07:00
kernel/audit_tree.c:audit_add_tree_rule(): protect `rule' from kill_rules()
2013-06-12 16:29:46 -07:00
audit: Fix decimal constant description
2013-07-09 10:33:19 -07:00
audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent audit_names record
2013-07-09 10:33:19 -07:00
xfs: update for v3.12-rc1
2013-09-09 11:19:09 -07:00
Kill indirect include of file.h from eventfd.h, use fdget() in cgroup.c
2013-09-07 19:54:57 -04:00
cgroup: make css_for_each_descendant() and friends include the origin css in the iteration
2013-08-08 20:11:27 -04:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
2013-05-01 07:21:43 -07:00
proc: Supply PDE attribute setting accessor functions
2013-05-01 17:29:18 -04:00
arm: Fix build error with context tracking calls
2013-09-27 17:59:47 +02:00
ACPI / processor: Acquire writer lock to update CPU maps
2013-08-13 12:20:16 +02:00
Merge branch 'for-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2013-09-03 18:25:03 -07:00
ptrace: revert "Prepare to fix racy accesses on task breakpoints"
2013-07-09 10:33:26 -07:00
extable: skip sorting if the table is empty
2013-09-11 15:58:25 -07:00
Merge git://git.kvack.org/~bcrl/aio-next
2013-09-13 10:55:58 -07:00
freezer: set PF_SUSPEND_TASK flag on tasks that call freeze_processes
2013-07-30 14:05:06 +02:00
futex: Use freezable blocking call
2013-06-25 23:11:19 +02:00
userns: Kill nsown_capable it makes the wrong thing easy
2013-08-30 23:44:11 -07:00
kernel: delete __cpuinit usage from all core kernel files
2013-07-14 19:36:59 -04:00
hung_task debugging: Print more info when reporting the problem
2013-08-02 11:02:42 +02:00
jump_label: Split jumplabel ratelimit
2013-08-09 07:53:54 -07:00
kernel: kallsyms: memory override issue, need check destination buffer length
2013-04-15 15:17:26 +09:30
locking: Fix copy/paste errors of "ARCH_INLINE_*_UNLOCK_BH"
2013-05-28 08:50:00 +02:00
kexec: remove unnecessary return
2013-09-11 15:59:10 -07:00
usermodehelper: kill the sub_info->path[0] check
2013-07-03 16:08:02 -07:00
kprobes: allow to specify custom allocator for insn caches
2013-09-11 15:58:52 -07:00
kernel: replace strict_strto*() with kstrto*()
2013-09-12 15:38:03 -07:00
kthread: implement probe_kthread_data()
2013-04-30 17:04:02 -07:00
lglock: Update lockdep annotations to report recursive local locks
2013-07-12 13:51:19 +02:00
lockdep: remove task argument from debug_check_no_locks_held
2013-05-12 14:16:21 +02:00
Remove GENERIC_HARDIRQ config option
2013-09-13 15:09:52 +02:00
CONFIG_SYMBOL_PREFIX: cleanup.
2013-03-15 15:09:43 +10:30
kernel/modsign_pubkey.c: fix init const for module signing code
2013-09-11 15:58:21 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-09-05 08:50:26 -07:00
Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-09-04 08:18:19 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2013-09-07 14:35:32 -07:00
padata - Register hotcpu notifier after initialization
2013-08-29 14:37:59 +10:00
panic: call panic handlers before kmsg_dump
2013-09-11 15:59:30 -07:00
kernel/params: fix handling of signed integer types
2013-09-28 12:35:52 -07:00
pidns: Fix hang in zap_pid_ns_processes by sending a potentially extra wakeup
2013-08-30 17:30:37 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2013-09-07 14:35:32 -07:00
posix_timers: fix racy timer delta caching on task exit
2013-07-03 16:54:42 +02:00
posix-timers: Remove unused variable
2013-04-18 12:51:19 +02:00
kernel: delete __cpuinit usage from all core kernel files
2013-07-14 19:36:59 -04:00
__ptrace_may_access() should not deny sub-threads
2013-09-11 15:59:01 -07:00
range: Do not add new blank slot with add_range_with_merge
2013-06-18 11:32:10 -05:00
rcu: Make call_rcu() leak callbacks for debug-object errors
2013-08-18 17:40:03 -07:00
Not much changes for the 3.12 merge window. The major tracing changes
2013-09-09 14:42:15 -07:00
rcu: Add const annotation to char * for RCU tracepoints and functions
2013-07-29 17:07:49 -04:00
rcu: Add const annotation to char * for RCU tracepoints and functions
2013-07-29 17:07:49 -04:00
rcu: Make rcutorture emit online failures if verbose
2013-08-20 11:38:45 -07:00
Merge branches 'doc.2013.08.19a', 'fixes.2013.08.20a', 'sysidle.2013.08.31a' and 'torture.2013.08.20a' into HEAD
2013-08-31 14:44:45 -07:00
nohz_full: Force RCU's grace-period kthreads onto timekeeping CPU
2013-08-31 14:44:02 -07:00
nohz_full: Force RCU's grace-period kthreads onto timekeeping CPU
2013-08-31 14:44:02 -07:00
rcutrace: single_open() leaks
2013-05-05 00:16:35 -04:00
kernel/reboot.c: re-enable the function of variable reboot_default
2013-09-24 17:00:26 -07:00
kernel: delete __cpuinit usage from all core kernel files
2013-07-14 19:36:59 -04:00
memcg: reduce function dereference
2013-09-12 15:38:02 -07:00
kernel/resource.c: remove the unneeded assignment in function __find_resource
2013-07-03 16:08:06 -07:00
locking/rtmutex/tester: Set correct permissions on sysfs files
2013-04-10 14:48:37 +02:00
rtmutex: Document rt_mutex_adjust_prio_chain()
2013-05-28 09:23:52 +02:00
Revert "rw_semaphore: remove up/down_read_non_owner"
2013-03-23 15:53:52 -07:00
seccomp: allow BPF_XOR based ALU instructions.
2013-03-26 11:07:19 +11:00
semaphore: use `bool' type for semaphore_waiter's up
2013-04-30 17:04:08 -07:00
kernel-wide: fix missing validations on __get/__put/__copy_to/__copy_from_user()
2013-09-11 15:58:18 -07:00
kernel/smp.c: quit unconditionally enabling irqs in on_each_cpu_mask().
2013-09-11 15:58:25 -07:00
kernel: delete __cpuinit usage from all core kernel files
2013-07-14 19:36:59 -04:00
Remove GENERIC_HARDIRQ config option
2013-09-13 15:09:52 +02:00
kernel/spinlock.c: add default arch_*_relax definitions for GENERIC_LOCKBREAK
2013-09-11 15:58:21 -07:00
userns: Kill nsown_capable it makes the wrong thing easy
2013-08-30 23:44:11 -07:00
unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE
2013-05-09 13:46:38 -04:00
perf: Enforce 1 as lower limit for perf_event_max_sample_rate
2013-10-04 10:06:07 +02:00
kernel: remove unnecessary head file
2013-06-26 18:01:46 +09:00
task_work: documentation
2013-09-11 15:58:27 -07:00
kernel/: rename random32() to prandom_u32()
2013-04-29 18:28:42 -07:00
sched: Rename sched.c as sched/core.c in comments and Documentation
2013-06-19 12:58:42 +02:00
kernel: delete __cpuinit usage from all core kernel files
2013-07-14 19:36:59 -04:00
Tracing updates for Linux 3.10
2013-04-29 13:55:38 -07:00
userns: Kill nsown_capable it makes the wrong thing easy
2013-08-30 23:44:11 -07:00
smp.h: move !SMP version of on_each_cpu() out-of-line
2013-09-11 15:58:25 -07:00
userns: Better restrictions on when proc and sysfs can be mounted
2013-08-26 19:17:03 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2013-09-07 14:35:32 -07:00
userns: Kill nsown_capable it makes the wrong thing easy
2013-08-30 23:44:11 -07:00
kernel: fix new kernel-doc warning in wait.c
2013-08-19 09:08:54 -07:00
watchdog: update watchdog_thresh properly
2013-09-24 17:00:25 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-09-06 09:36:28 -07:00
sched: Rename sched.c as sched/core.c in comments and Documentation
2013-06-19 12:58:42 +02:00
fdfbbd07e9