linux/kernel/events
Linus Torvalds add7695957 Perf events updates for v6.2:
- Thoroughly rewrite the data structures that implement perf task context handling,
    with the goal of fixing various quirks and unfeatures both in already merged,
    and in upcoming proposed code.
 
    The old data structure is the per task and per cpu perf_event_contexts:
 
          task_struct::perf_events_ctxp[] <-> perf_event_context <-> perf_cpu_context
               ^                                 |    ^     |           ^
               `---------------------------------'    |     `--> pmu ---'
                                                      v           ^
                                                 perf_event ------'
 
    In this new design this is replaced with a single task context and
    a single CPU context, plus intermediate data-structures:
 
          task_struct::perf_event_ctxp -> perf_event_context <- perf_cpu_context
               ^                           |   ^ ^
               `---------------------------'   | |
                                               | |    perf_cpu_pmu_context <--.
                                               | `----.    ^                  |
                                               |      |    |                  |
                                               |      v    v                  |
                                               | ,--> perf_event_pmu_context  |
                                               | |                            |
                                               | |                            |
                                               v v                            |
                                          perf_event ---> pmu ----------------'
 
    [ See commit bd27568117 for more details. ]
 
    This rewrite was developed by Peter Zijlstra and Ravi Bangoria.
 
  - Optimize perf_tp_event()
 
  - Update the Intel uncore PMU driver, extending it with UPI topology discovery
    on various hardware models.
 
  - Misc fixes & cleanups
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-core-2022-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf events updates from Ingo Molnar:

 - Thoroughly rewrite the data structures that implement perf task
   context handling, with the goal of fixing various quirks and
   unfeatures both in already merged, and in upcoming proposed code.

   The old data structure is the per task and per cpu
   perf_event_contexts:

         task_struct::perf_events_ctxp[] <-> perf_event_context <-> perf_cpu_context
              ^                                 |    ^     |           ^
              `---------------------------------'    |     `--> pmu ---'
                                                     v           ^
                                                perf_event ------'

   In this new design this is replaced with a single task context and a
   single CPU context, plus intermediate data-structures:

         task_struct::perf_event_ctxp -> perf_event_context <- perf_cpu_context
              ^                           |   ^ ^
              `---------------------------'   | |
                                              | |    perf_cpu_pmu_context <--.
                                              | `----.    ^                  |
                                              |      |    |                  |
                                              |      v    v                  |
                                              | ,--> perf_event_pmu_context  |
                                              | |                            |
                                              | |                            |
                                              v v                            |
                                         perf_event ---> pmu ----------------'

   [ See commit bd27568117 for more details. ]

   This rewrite was developed by Peter Zijlstra and Ravi Bangoria.

 - Optimize perf_tp_event()

 - Update the Intel uncore PMU driver, extending it with UPI topology
   discovery on various hardware models.

 - Misc fixes & cleanups

* tag 'perf-core-2022-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (25 commits)
  perf/x86/intel/uncore: Fix reference count leak in __uncore_imc_init_box()
  perf/x86/intel/uncore: Fix reference count leak in snr_uncore_mmio_map()
  perf/x86/intel/uncore: Fix reference count leak in hswep_has_limit_sbox()
  perf/x86/intel/uncore: Fix reference count leak in sad_cfg_iio_topology()
  perf/x86/intel/uncore: Make set_mapping() procedure void
  perf/x86/intel/uncore: Update sysfs-devices-mapping file
  perf/x86/intel/uncore: Enable UPI topology discovery for Sapphire Rapids
  perf/x86/intel/uncore: Enable UPI topology discovery for Icelake Server
  perf/x86/intel/uncore: Get UPI NodeID and GroupID
  perf/x86/intel/uncore: Enable UPI topology discovery for Skylake Server
  perf/x86/intel/uncore: Generalize get_topology() for SKX PMUs
  perf/x86/intel/uncore: Disable I/O stacks to PMU mapping on ICX-D
  perf/x86/intel/uncore: Clear attr_update properly
  perf/x86/intel/uncore: Introduce UPI topology type
  perf/x86/intel/uncore: Generalize IIO topology support
  perf/core: Don't allow grouping events from different hw pmus
  perf/amd/ibs: Make IBS a core pmu
  perf: Fix function pointer case
  perf/x86/amd: Remove the repeated declaration
  perf: Fix possible memleak in pmu_dev_alloc()
  ...
2022-12-12 15:19:38 -08:00
..
callchain.c uaccess: remove CONFIG_SET_FS 2022-02-25 09:36:06 +01:00
core.c Perf events updates for v6.2: 2022-12-12 15:19:38 -08:00
hw_breakpoint_test.c perf/hw_breakpoint: test: Skip the test if dependencies unmet 2022-11-02 12:22:05 +01:00
hw_breakpoint.c perf/hw_breakpoint: Annotate tsk->perf_event_mutex vs ctx->mutex 2022-10-04 13:32:09 +02:00
internal.h perf/core: Fix perf_mmap fail when CONFIG_PERF_USE_VMALLOC enabled 2022-04-19 21:15:42 +02:00
Makefile perf/hw_breakpoint: Add KUnit test for constraints accounting 2022-08-30 10:56:20 +02:00
ring_buffer.c perf: Fix missing SIGTRAPs 2022-10-17 16:32:05 +02:00
uprobes.c mm/madvise: add file and shmem support to MADV_COLLAPSE 2022-10-03 14:03:33 -07:00