pm24.git/include/linux/perf_event.h, branch v4.6-rc7

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

2016-03-24T17:02:14Z

Pull perf fixes from Ingo Molnar: "This tree contains various perf fixes on the kernel side, plus three hw/event-enablement late additions: - Intel Memory Bandwidth Monitoring events and handling - the AMD Accumulated Power Mechanism reporting facility - more IOMMU events ... and a final round of perf tooling updates/fixes" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (44 commits) perf llvm: Use strerror_r instead of the thread unsafe strerror one perf llvm: Use realpath to canonicalize paths perf tools: Unexport some methods unused outside strbuf.c perf probe: No need to use formatting strbuf method perf help: Use asprintf instead of adhoc equivalents perf tools: Remove unused perf_pathdup, xstrdup functions perf tools: Do not include stringify.h from the kernel sources tools include: Copy linux/stringify.h from the kernel tools lib traceevent: Remove redundant CPU output perf tools: Remove needless 'extern' from function prototypes perf tools: Simplify die() mechanism perf tools: Remove unused DIE_IF macro perf script: Remove lots of unused arguments perf thread: Rename perf_event__preprocess_sample_addr to thread__resolve perf machine: Rename perf_event__preprocess_sample to machine__resolve perf tools: Add cpumode to struct perf_sample perf tests: Forward the perf_sample in the dwarf unwind test perf tools: Remove misplaced __maybe_unused perf list: Fix documentation of :ppp perf bench numa: Fix assertion for nodes bitfield ...

perf/x86/amd/power: Add AMD accumulated power reporting mechanism

2016-03-21T08:37:15Z

Introduce an AMD accumlated power reporting mechanism for the Family 15h, Model 60h processor that can be used to calculate the average power consumed by a processor during a measurement interval. The feature support is indicated by CPUID Fn8000_0007_EDX[12]. This feature will be implemented both in hwmon and perf. The current design provides one event to report per package/processor power consumption by counting each compute unit power value. Here the gory details of how the computation is done: * Tsample: compute unit power accumulator sample period * Tref: the PTSC counter period (PTSC: performance timestamp counter) * N: the ratio of compute unit power accumulator sample period to the PTSC period * Jmax: max compute unit accumulated power which is indicated by MSR_C001007b[MaxCpuSwPwrAcc] * Jx/Jy: compute unit accumulated power which is indicated by MSR_C001007a[CpuSwPwrAcc] * Tx/Ty: the value of performance timestamp counter which is indicated by CU_PTSC MSR_C0010280[PTSC] * PwrCPUave: CPU average power i. Determine the ratio of Tsample to Tref by executing CPUID Fn8000_0007. N = value of CPUID Fn8000_0007_ECX[CpuPwrSampleTimeRatio[15:0]]. ii. Read the full range of the cumulative energy value from the new MSR MaxCpuSwPwrAcc. Jmax = value returned. iii. At time x, software reads CpuSwPwrAcc and samples the PTSC. Jx = value read from CpuSwPwrAcc and Tx = value read from PTSC. iv. At time y, software reads CpuSwPwrAcc and samples the PTSC. Jy = value read from CpuSwPwrAcc and Ty = value read from PTSC. v. Calculate the average power consumption for a compute unit over time period (y-x). Unit of result is uWatt: if (Jy < Jx) // Rollover has occurred Jdelta = (Jy + Jmax) - Jx else Jdelta = Jy - Jx PwrCPUave = N * Jdelta * 1000 / (Ty - Tx) Simple example: root@hr-zp:/home/ray/tip# ./tools/perf/perf stat -a -e 'power/power-pkg/' make -j4 CHK include/config/kernel.release CHK include/generated/uapi/linux/version.h CHK include/generated/utsrelease.h CHK include/generated/timeconst.h CHK include/generated/bounds.h CHK include/generated/asm-offsets.h CALL scripts/checksyscalls.sh CHK include/generated/compile.h SKIPPED include/generated/compile.h Building modules, stage 2. Kernel: arch/x86/boot/bzImage is ready (#40) MODPOST 4225 modules Performance counter stats for 'system wide': 183.44 mWatts power/power-pkg/ 341.837270111 seconds time elapsed root@hr-zp:/home/ray/tip# ./tools/perf/perf stat -a -e 'power/power-pkg/' sleep 10 Performance counter stats for 'system wide': 0.18 mWatts power/power-pkg/ 10.012551815 seconds time elapsed Suggested-by: Peter Zijlstra Suggested-by: Ingo Molnar Suggested-by: Borislav Petkov Signed-off-by: Huang Rui Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Thomas Gleixner Cc: Alexander Shishkin Cc: Andy Lutomirski Cc: Arnaldo Carvalho de Melo Cc: Arnaldo Carvalho de Melo Cc: Borislav Petkov Cc: Brian Gerst Cc: David Ahern Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Jiri Olsa Cc: Kan Liang Cc: Linus Torvalds Cc: Namhyung Kim Cc: Robert Richter Cc: Stephane Eranian Cc: Vince Weaver Cc: jacob.w.shin@gmail.com Link: http://lkml.kernel.org/r/1457502306-2559-1-git-send-email-ray.huang@amd.com [ Fixed the modular build. ] Signed-off-by: Ingo Molnar

perf/x86/cqm: Fix CQM handling of grouping events into a cache_group

2016-03-21T08:08:18Z

Currently CQM (cache quality of service monitoring) is grouping all events belonging to same PID to use one RMID. However its not counting all of these different events. Hence we end up with a count of zero for all events other than the group leader. The patch tries to address the issue by keeping a flag in the perf_event.hw which has other CQM related fields. The field is updated at event creation and during grouping. Signed-off-by: Vikas Shivappa [peterz: Changed hw_perf_event::is_group_event to an int] Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Tony Luck Acked-by: Thomas Gleixner Cc: Alexander Shishkin Cc: Andy Lutomirski Cc: Arnaldo Carvalho de Melo Cc: Borislav Petkov Cc: Brian Gerst Cc: David Ahern Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Jiri Olsa Cc: Linus Torvalds Cc: Matt Fleming Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Vince Weaver Cc: fenghua.yu@intel.com Cc: h.peter.anvin@intel.com Cc: ravi.v.shankar@intel.com Cc: vikas.shivappa@intel.com Link: http://lkml.kernel.org/r/1457652732-4499-2-git-send-email-vikas.shivappa@linux.intel.com Signed-off-by: Ingo Molnar

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2016-03-19T17:05:34Z

Pull networking updates from David Miller: "Highlights: 1) Support more Realtek wireless chips, from Jes Sorenson. 2) New BPF types for per-cpu hash and arrap maps, from Alexei Starovoitov. 3) Make several TCP sysctls per-namespace, from Nikolay Borisov. 4) Allow the use of SO_REUSEPORT in order to do per-thread processing of incoming TCP/UDP connections. The muxing can be done using a BPF program which hashes the incoming packet. From Craig Gallek. 5) Add a multiplexer for TCP streams, to provide a messaged based interface. BPF programs can be used to determine the message boundaries. From Tom Herbert. 6) Add 802.1AE MACSEC support, from Sabrina Dubroca. 7) Avoid factorial complexity when taking down an inetdev interface with lots of configured addresses. We were doing things like traversing the entire address less for each address removed, and flushing the entire netfilter conntrack table for every address as well. 8) Add and use SKB bulk free infrastructure, from Jesper Brouer. 9) Allow offloading u32 classifiers to hardware, and implement for ixgbe, from John Fastabend. 10) Allow configuring IRQ coalescing parameters on a per-queue basis, from Kan Liang. 11) Extend ethtool so that larger link mode masks can be supported. From David Decotigny. 12) Introduce devlink, which can be used to configure port link types (ethernet vs Infiniband, etc.), port splitting, and switch device level attributes as a whole. From Jiri Pirko. 13) Hardware offload support for flower classifiers, from Amir Vadai. 14) Add "Local Checksum Offload". Basically, for a tunneled packet the checksum of the outer header is 'constant' (because with the checksum field filled into the inner protocol header, the payload of the outer frame checksums to 'zero'), and we can take advantage of that in various ways. From Edward Cree" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1548 commits) bonding: fix bond_get_stats() net: bcmgenet: fix dma api length mismatch net/mlx4_core: Fix backward compatibility on VFs phy: mdio-thunder: Fix some Kconfig typos lan78xx: add ndo_get_stats64 lan78xx: handle statistics counter rollover RDS: TCP: Remove unused constant RDS: TCP: Add sysctl tunables for sndbuf/rcvbuf on rds-tcp socket net: smc911x: convert pxa dma to dmaengine team: remove duplicate set of flag IFF_MULTICAST bonding: remove duplicate set of flag IFF_MULTICAST net: fix a comment typo ethernet: micrel: fix some error codes ip_tunnels, bpf: define IP_TUNNEL_OPTS_MAX and use it bpf, dst: add and use dst_tclassid helper bpf: make skb->tc_classid also readable net: mvneta: bm: clarify dependencies cls_bpf: reset class and reuse major in da ldmvsw: Checkpatch sunvnet.c and sunvnet_common.c ldmvsw: Add ldmvsw.c driver code ...

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

2016-03-15T02:44:38Z

Pull NOHZ updates from Ingo Molnar: "NOHZ enhancements, by Frederic Weisbecker, which reorganizes/refactors the NOHZ 'can the tick be stopped?' infrastructure and related code to be data driven, and harmonizes the naming and handling of all the various properties" [ This makes the ugly "fetch_or()" macro that the scheduler used internally a new generic helper, and does a bad job at it. I'm pulling it, but I've asked Ingo and Frederic to get this fixed up ] * 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched-clock: Migrate to use new tick dependency mask model posix-cpu-timers: Migrate to use new tick dependency mask model sched: Migrate sched to use new tick dependency mask model sched: Account rr tasks perf: Migrate perf to use new tick dependency mask model nohz: Use enum code for tick stop failure tracing message nohz: New tick dependency mask nohz: Implement wide kick on top of irq work atomic: Export fetch_or()

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2016-03-08T17:34:12Z

Several cases of overlapping changes, as well as one instance (vxlan) of a bug fix in 'net' overlapping with code movement in 'net-next'. Signed-off-by: David S. Miller

Merge branch 'timers/core-v9' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into timers/nohz

2016-03-08T12:17:54Z

Pull nohz enhancements from Frederic Weisbecker: "Currently in nohz full configs, the tick dependency is checked asynchronously by nohz code from interrupt and context switch for each concerned subsystem with a set of function provided by these. Such functions are made of many conditions and details that can be heavyweight as they are called on fastpath: sched_can_stop_tick(), posix_cpu_timer_can_stop_tick(), perf_event_can_stop_tick()... Thomas suggested a few months ago to make that tick dependency check synchronous. Instead of checking subsystems details from each interrupt to guess if the tick can be stopped, every subsystem that may have a tick dependency should set itself a flag specifying the state of that dependency. This way we can verify if we can stop the tick with a single lightweight mask check on fast path. This conversion from a pull to a push model to implement tick dependency is the core feature of this patchset that is split into: * Nohz wide kick simplification * Improve nohz tracing * Introduce tick dependency mask * Migrate scheduler, posix timers, perf events and sched clock tick dependencies to the tick dependency mask." Signed-off-by: Ingo Molnar

perf: Migrate perf to use new tick dependency mask model

2016-03-02T15:43:00Z

Instead of providing asynchronous checks for the nohz subsystem to verify perf event tick dependency, migrate perf to the new mask. Perf needs the tick for two situations: 1) Freq events. We could set the tick dependency when those are installed on a CPU context. But setting a global dependency on top of the global freq events accounting is much easier. If people want that to be optimized, we can still refine that on the per-CPU tick dependency level. This patch dooesn't change the current behaviour anyway. 2) Throttled events: this is a per-cpu dependency. Reviewed-by: Chris Metcalf Cc: Christoph Lameter Cc: Chris Metcalf Cc: Ingo Molnar Cc: Luiz Capitulino Cc: Peter Zijlstra Cc: Rik van Riel Cc: Thomas Gleixner Cc: Viresh Kumar Signed-off-by: Frederic Weisbecker

perf: Allow storage of PMU private data in event

2016-02-29T08:35:16Z

For PMUs which are not per CPU, but e.g. per package/socket, we want to be able to store a reference to the underlying per package/socket facility in the event at init time so we can avoid magic storage constructs in the PMU driver. This allows us to get rid of the per CPU dance in the intel uncore and RAPL drivers and avoids a lookup of the per package data in the perf hotpath. Signed-off-by: Thomas Gleixner Signed-off-by: Peter Zijlstra (Intel) Cc: Andi Kleen Cc: Arnaldo Carvalho de Melo Cc: Borislav Petkov Cc: Harish Chegondi Cc: Jacob Pan Cc: Jiri Olsa Cc: Kan Liang Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Vince Weaver Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/20160222221011.364140369@linutronix.de Signed-off-by: Ingo Molnar

perf: Fix race between event install and jump_labels

2016-02-25T07:42:34Z

perf_install_in_context() relies upon the context switch hooks to have scheduled in events when the IPI misses its target -- after all, if the task has moved from the CPU (or wasn't running at all), it will have to context switch to run elsewhere. This however doesn't appear to be happening. It is possible for the IPI to not happen (task wasn't running) only to later observe the task running with an inactive context. The only possible explanation is that the context switch hooks are not called. Therefore put in a sync_sched() after toggling the jump_label to guarantee all CPUs will have them enabled before we install an event. A simple if (0->1) sync_sched() will not in fact work, because any further increment can race and complete before the sync_sched(). Therefore we must jump through some hoops. Signed-off-by: Peter Zijlstra (Intel) Cc: Alexander Shishkin Cc: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: dvyukov@google.com Cc: eranian@google.com Cc: oleg@redhat.com Cc: panand@redhat.com Cc: sasha.levin@oracle.com Cc: vince@deater.net Link: http://lkml.kernel.org/r/20160224174947.980211985@infradead.org Signed-off-by: Ingo Molnar