linux.git/arch/x86/kernel/cpu/Makefile, branch v3.11

perf/x86/amd: AMD IOMMU Performance Counter PERF uncore PMU implementation

2013-06-19T11:04:53+00:00

Implement a perf PMU to handle IOMMU performance counters and events.
The PMU only supports counting mode (e.g. perf stat). Since the counters
are shared across all cores, the PMU is implemented as "system-wide" mode.

To invoke the AMD IOMMU PMU, issue a perf tool command such as:

  ./perf stat -a -e amd_iommu// 

or:

  ./perf stat -a -e amd_iommu/config=,config1=/ 

For example:

  ./perf stat -a -e amd_iommu/mem_trans_total/ 

The resulting count will be how many IOMMU total peripheral memory
operations were performed during the command execution window.

Signed-off-by: Suravee Suthikulpanit 
Signed-off-by: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1370466709-3212-3-git-send-email-suravee.suthikulpanit@amd.com
Signed-off-by: Ingo Molnar

Merge branch 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-04-30T15:41:21+00:00

Pull x86 paravirt update from Ingo Molnar:
 "Various paravirtualization related changes - the biggest one makes
  guest support optional via CONFIG_HYPERVISOR_GUEST"

* 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, wakeup, sleep: Use pvops functions for changing GDT entries
  x86, xen, gdt: Remove the pvops variant of store_gdt.
  x86-32, gdt: Store/load GDT for ACPI S3 or hibernation/resume path is not needed
  x86-64, gdt: Store/load GDT for ACPI S3 or hibernate/resume path is not needed.
  x86: Make Linux guest support optional
  x86, Kconfig: Move PARAVIRT_DEBUG into the paravirt menu

Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-04-30T14:41:01+00:00

Pull perf updates from Ingo Molnar:
"Features:

- Add "uretprobes" - an optimization to uprobes, like kretprobes are
an optimization to kprobes. "perf probe -x file sym%return" now
works like kretprobes. By Oleg Nesterov.

- Introduce per core aggregation in 'perf stat', from Stephane
Eranian.

- Add memory profiling via PEBS, from Stephane Eranian.

- Event group view for 'annotate' in --stdio, --tui and --gtk, from
Namhyung Kim.

- Add support for AMD NB and L2I "uncore" counters, by Jacob Shin.

- Add Ivy Bridge-EP uncore support, by Zheng Yan

- IBM zEnterprise EC12 oprofile support patchlet from Robert Richter.

- Add perf test entries for checking breakpoint overflow signal
handler issues, from Jiri Olsa.

- Add perf test entry for for checking number of EXIT events, from
Namhyung Kim.

- Add perf test entries for checking --cpu in record and stat, from
Jiri Olsa.

- Introduce perf stat --repeat forever, from Frederik Deweerdt.

- Add --no-demangle to report/top, from Namhyung Kim.

- PowerPC fixes plus a couple of cleanups/optimizations in uprobes
and trace_uprobes, by Oleg Nesterov.

Various fixes and refactorings:

- Fix dependency of the python binding wrt libtraceevent, from
Naohiro Aota.

- Simplify some perf_evlist methods and to allow 'stat' to share code
with 'record' and 'trace', by Arnaldo Carvalho de Melo.

- Remove dead code in related to libtraceevent integration, from
Namhyung Kim.

- Revert "perf sched: Handle PERF_RECORD_EXIT events" to get 'perf
sched lat' back working, by Arnaldo Carvalho de Melo

- We don't use Newt anymore, just plain libslang, by Arnaldo Carvalho
de Melo.

- Kill a bunch of die() calls, from Namhyung Kim.

- Fix build on non-glibc systems due to libio.h absence, from Cody P
Schafer.

- Remove some perf_session and tracing dead code, from David Ahern.

- Honor parallel jobs, fix from Borislav Petkov

- Introduce tools/lib/lk library, initially just removing duplication
among tools/perf and tools/vm. from Borislav Petkov

... and many more I missed to list, see the shortlog and git log for
more details."

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (136 commits)
perf/x86/intel/P4: Robistify P4 PMU types
perf/x86/amd: Fix AMD NB and L2I "uncore" support
perf/x86/amd: Remove old-style NB counter support from perf_event_amd.c
perf/x86: Check all MSRs before passing hw check
perf/x86/amd: Add support for AMD NB and L2I "uncore" counters
perf/x86/intel: Add Ivy Bridge-EP uncore support
perf/x86/intel: Fix SNB-EP CBO and PCU uncore PMU filter management
perf/x86: Avoid kfree() in CPU_{STARTING,DYING}
uprobes/perf: Avoid perf_trace_buf_prepare/submit if ->perf_events is empty
uprobes/tracing: Don't pass addr=ip to perf_trace_buf_submit()
uprobes/tracing: Change create_trace_uprobe() to support uretprobes
uprobes/tracing: Make seq_printf() code uretprobe-friendly
uprobes/tracing: Make register_uprobe_event() paths uretprobe-friendly
uprobes/tracing: Make uprobe_{trace,perf}_print() uretprobe-friendly
uprobes/tracing: Introduce is_ret_probe() and uretprobe_dispatcher()
uprobes/tracing: Introduce uprobe_{trace,perf}_print() helpers
uprobes/tracing: Generalize struct uprobe_trace_entry_head
uprobes/tracing: Kill the pointless local_save_flags/preempt_count calls
uprobes/tracing: Kill the pointless seq_print_ip_sym() call
uprobes/tracing: Kill the pointless task_pt_regs() calls
...

mkcapflags.pl: convert to mkcapflags.sh

2013-04-29T22:54:27+00:00

Generate asm-x86/cpufeature.h with posix-2008 commands instead of perl.

Signed-off-by: Rob Landley 
Cc: Thomas Gleixner 
Cc: Josh Boyer 
Cc: "Paul E. McKenney" 
Cc: David Howells 
Cc: Michal Marek 
Cc: Sam Ravnborg 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

perf/x86/amd: Add support for AMD NB and L2I "uncore" counters

2013-04-21T09:01:24+00:00

Add support for AMD Family 15h [and above] northbridge
performance counters. MSRs 0xc0010240 ~ 0xc0010247 are shared
across all cores that share a common northbridge.

Add support for AMD Family 16h L2 performance counters. MSRs
0xc0010230 ~ 0xc0010237 are shared across all cores that share a
common L2 cache.

We do not enable counter overflow interrupts. Sampling mode and
per-thread events are not supported.

Signed-off-by: Jacob Shin 
Cc: Arnaldo Carvalho de Melo 
Cc: Stephane Eranian 
Cc: Jiri Olsa 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20130419213428.GA8229@jshin-Toonie
Signed-off-by: Ingo Molnar

x86: Make Linux guest support optional

2013-03-04T21:14:25+00:00

Put all config options needed to run Linux as a guest behind a
CONFIG_HYPERVISOR_GUEST menu so that they don't get built-in by default
but be selectable by the user. Also, make all units which depend on
x86_hyper, depend on this new symbol so that compilation doesn't fail
when CONFIG_HYPERVISOR_GUEST is disabled but those units assume its
presence.

Sort options in the new HYPERVISOR_GUEST menu, adapt config text and
drop redundant select.

Signed-off-by: Borislav Petkov 
Link: http://lkml.kernel.org/r/1362428421-9244-3-git-send-email-bp@alien8.de
Cc: Dmitry Torokhov 
Cc: K. Y. Srinivasan 
Cc: Haiyang Zhang 
Signed-off-by: H. Peter Anvin

perf/x86: Add support for Intel Xeon-Phi Knights Corner PMU

2012-10-04T11:32:37+00:00

The following patch adds perf_event support for the Xeon-Phi
PMU, as documented in the "Intel Xeon Phi Coprocessor (codename:
Knights Corner) Performance Monitoring Units" manual.

Even though it is a co-processor, a Phi runs a full Linux
environment and can support performance counters.

This is just barebones support, it does not add support for
interesting new features such as the SPFLT intruction that
allows starting/stopping events without entering the kernel.

The PMU internally is just like that of an original Pentium, but
a "P6-like" MSR interface is provided.  The interface is
different enough from a real P6 that it's not easy (or
practical) to re-use the code in  perf_event_p6.c

Acked-by: Lawrence F Meadows 
Acked-by: Cyrill Gorcunov 
Signed-off-by: Vince Weaver 
Acked-by: Peter Zijlstra 
Cc: Paul Mackerras 
Cc: Arnaldo Carvalho de Melo 
Cc: eranian@gmail.com
Cc: Lawrence F 
Link: http://lkml.kernel.org/r/alpine.DEB.2.02.1209261405320.8398@vincent-weaver-1.um.maine.edu
Signed-off-by: Ingo Molnar

Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2012-07-26T20:08:01+00:00

Pull scheduler changes from Ingo Molnar:
 "The biggest change is a performance improvement on SMP systems:

  | 4 socket 40 core + SMT Westmere box, single 30 sec tbench
  | runs, higher is better:
  |
  | clients     1       2       4        8       16       32       64      128
  |..........................................................................
  | pre        30      41     118      645     3769     6214    12233    14312
  | post      299     603    1211     2418     4697     6847    11606    14557
  |
  | A nice increase in performance.

  which speedup is particularly noticeable on heavily interacting
  few-tasks workloads, so the changes should help desktop-style Xorg
  workloads and interactivity as well, on multi-core CPUs.

  There are also cpuset suspend behavior fixes/restructuring and various
  smaller tweaks."

* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched: Fix race in task_group()
  sched: Improve balance_cpu() to consider other cpus in its group as target of (pinned) task
  sched: Reset loop counters if all tasks are pinned and we need to redo load balance
  sched: Reorder 'struct lb_env' members to reduce its size
  sched: Improve scalability via 'CPU buddies', which withstand random perturbations
  cpusets: Remove/update outdated comments
  cpusets, hotplug: Restructure functions that are invoked during hotplug
  cpusets, hotplug: Implement cpuset tree traversal in a helper function
  CPU hotplug, cpusets, suspend: Don't modify cpusets during suspend/resume
  sched/x86: Remove broken power estimation

sched/x86: Remove broken power estimation

2012-07-24T11:53:00+00:00

The x86 sched power implementation has been broken forever and gets in
the way of other stuff, remove it.

[ For archaeological interest, fixing this code would require dealing
  with the cross-cpu calling of these functions and more importantly, we
  need to filter idle time out of the a/m-perf stuff because the ratio
  will go down to 0 when idle, giving a 0 capacity which is not what
  we'd want. ]

Signed-off-by: Peter Zijlstra 
Cc: Linus Torvalds 
Cc: Andrew Morton 
Cc: Arjan van de Ven 
Link: http://lkml.kernel.org/r/1339594110.8980.38.camel@twins
Signed-off-by: Ingo Molnar

perf/x86: Add generic Intel uncore PMU support

2012-06-18T10:13:22+00:00

This patch adds the generic Intel uncore PMU support, including helper
functions that add/delete uncore events, a hrtimer that periodically
polls the counters to avoid overflow and code that places all events
for a particular socket onto a single cpu.

The code design is based on the structure of Sandy Bridge-EP's uncore
subsystem, which consists of a variety of components, each component
contains one or more "boxes".

(Tooling support follows in the next patches.)

Signed-off-by: Zheng Yan 
Signed-off-by: Peter Zijlstra 
Cc: Linus Torvalds 
Cc: Andrew Morton 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1339741902-8449-6-git-send-email-zheng.z.yan@intel.com
Signed-off-by: Ingo Molnar