The patches 1~7 (can be applied/built/tested independently) of this package implement the low-level logic for the Linux performance counter subsystem (Perf-events) on MIPS, which enables the collection of all sorts of HW/SW performance events based on per-CPU or per-task. For more information, please refer to tools/perf/Documentation/perf.txt. And No. 8~12 make Oprofile use Perf-events framework as backend. This effort makes the bug-fixes shared by different pmu users/clients (for now, Oprofile & Perf-events), and make them coexist in the system without locking issues, and make their results comparable. The whole patchset was tested on the Malta-R board. 24K/34K/74K/1004K cores and SMVP/UP kernels have been basically tested. Welcome any more tests against these cores for Perf-events and all mipsxx CPUs for Oprofile. To test the functionality of Perf-event, you may want to compile the tool "perf" for your MIPS platform. You can refer to the following URL: http://www.linux-mips.org/archives/linux-mips/2010-04/msg00158.html Please note: Before that patch is accepted, you can choose a "specific" rmb() which is suitable for your platform -- an example is provided in the description of that patch. You also need to customize the CFLAGS and LDFLAGS in tools/perf/Makefile for your libs, includes, etc. In case you encounter the boot failure in SMVP kernel on multi-threading CPUs, you may take a look at: http://www.linux-mips.org/git?p=linux-mti.git;a=commitdiff;h=5460815027d802697b879644c74f0e8365254020 Note: 1) To support mipsxx CPUs other than 24K/34K/74K/1004K, the corresponding general event map, cache event map and raw event macros need to be added. Please refer to init_hw_perf_events() for more info. Please note that, even before this is done, Oprofile with the new framework can still work on *ALL* mipsxx CPUs. For those CPUs not yet having "precise" raw event implementation (refer to patch #7), the unchecked raw events are used. 2) To support other CPUs which have different PMU than mipsxx, such as RM9000 and LOONGSON2, additional files perf_event_$cpu.c need to be created. So, the patches 1~7 can be reviewed and applied (if OK, hope so) without affecting the existing Oprofile and other parts --- only a new kernel facility is brought in :-) And the patches 8~12 can be applied after perf_event_rm9000.c and perf_event_loongson2.c are added in, because 8~12 removed all the old Oprofile interfaces and replaced with new ones, which will call into the rm9000/loongson2 Perf-events backend on corresponding CPUs. CHANGES: ----------------------------- v5 - v4: - splitting up Perf-events patches (v4 patches 1~4 are now splitted into v5 patches 1~7) for easier review. - adding more info into the description of patches (especially how to test this patchset). - simplifying the 2 small functions mipspmu_get_pmu_id() and mipspmu_get_max_events(). v4 - v3: - placing the variable save_perf_irq properly (issue found by Wu Zhangjin) - the patches 5~9 make Oprofile use Perf-events framework as backend. v3 - v2: - adding 1004K core support. - slightly adjusting the code structure. - adding more comments in the code. - fixing some small coding style issues. v2 - v1: - Adjusting code structure as suggested by Wu Zhangjin. With this change, hardware performance event support for loongson2 and rm9000 can be conveniently implemented by adding and including new files like perf_event_loongson2.c; Oprofile and Perf for MIPS are now sharing pmu.h; Naming changes were made to some functions. - Fixing the generic atomic64 issue reported by David Daney. Currently, 32bit kernel is using the generic version from lib. When Ralf Baechle's common atomic64 version is ready, this may change. - Adding raw event support. For more details, please refer to the code comments for mipsxx_pmu_map_raw_event(). - Adding new software events - PERF_COUNT_SW_ALIGNMENT_FAULTS and PERF_COUNT_SW_EMULATION_FAULTS. - Fixing some small bugs. - Adding new comments for the code. - Making some code style changes. v1: - Using generic atomic64 operations from lib. - SMVP/UP kernels are supported (not for SMTC). - 24K/34K/74K cores are implemented. - Currently working when Oprofile is _not_ available. - Minimal software perf events are supported. ----------------------------- Deng-Cheng Zhu (12): MIPS/Oprofile: extract PMU defines/helper functions for sharing MIPS: use generic atomic64 in non-64bit kernels MIPS: add support for software performance events MIPS: add support for hardware performance events (skeleton) MIPS/Perf-events: add callchain support MIPS: add support for hardware performance events (mipsxx) MIPS/Perf-events: add raw event support for mipsxx 24K/34K/74K/1004K MIPS: move mipsxx pmu helper functions to Perf-events MIPS/Perf-events: replace pmu names with numeric IDs MIPS/Perf-events: allow modules to get pmu number of counters MIPS/Oprofile: use Perf-events framework as backend MIPS/Oprofile: remove old files and update Kconfig/Makefile arch/mips/Kconfig | 13 +- arch/mips/include/asm/atomic.h | 4 + arch/mips/include/asm/perf_event.h | 28 + arch/mips/include/asm/pmu.h | 119 ++++ arch/mips/kernel/Makefile | 2 + arch/mips/kernel/perf_event.c | 647 +++++++++++++++++++ arch/mips/kernel/perf_event_mipsxx.c | 1039 +++++++++++++++++++++++++++++++ arch/mips/kernel/traps.c | 18 +- arch/mips/kernel/unaligned.c | 5 + arch/mips/math-emu/cp1emu.c | 3 + arch/mips/mm/fault.c | 11 +- arch/mips/oprofile/Makefile | 7 - arch/mips/oprofile/common.c | 237 ++++++-- arch/mips/oprofile/op_impl.h | 39 -- arch/mips/oprofile/op_model_loongson2.c | 155 ----- arch/mips/oprofile/op_model_mipsxx.c | 397 ------------ arch/mips/oprofile/op_model_rm9000.c | 138 ---- 17 files changed, 2061 insertions(+), 801 deletions(-) create mode 100644 arch/mips/include/asm/perf_event.h create mode 100644 arch/mips/include/asm/pmu.h create mode 100644 arch/mips/kernel/perf_event.c create mode 100644 arch/mips/kernel/perf_event_mipsxx.c delete mode 100644 arch/mips/oprofile/op_impl.h delete mode 100644 arch/mips/oprofile/op_model_loongson2.c delete mode 100644 arch/mips/oprofile/op_model_mipsxx.c delete mode 100644 arch/mips/oprofile/op_model_rm9000.c
