Changes since V5 - Introduce a new universal page walker for the page size in the perf subsystem. - Rebased on Peter's tree.
Current perf can report both virtual addresses and physical addresses, but not the page size. Without the page size information of the utilized page, users cannot decide whether to promote/demote large pages to optimize memory usage. The patch set was submitted a year ago. https://lkml.kernel.org/r/[email protected] It introduced a __weak function, perf_get_page_size(), aim to retrieve the page size via a given virtual address in the generic code, and implemented a x86 specific version of perf_get_page_size(). However, the proposal was rejected, because it's a pure x86 implementation. https://lkml.kernel.org/r/[email protected] At that time, it's not easy to support perf_get_page_size() universally, because some key functions, e.g., p?d_large, are not supported by some architectures. Now, the generic p?d_leaf() functions are added in the latest kernel. https://lkml.kernel.org/r/[email protected] Starts from V6, a new universal perf_get_page_size() function is implemented based on the generic p?d_leaf() functions. On some platforms, e.g., X86, the page walker is invoked in an NMI handler. So the page walker must be IRQ-safe and low overhead. Besides, the page walker should work for both user and kernel virtual address. The existing generic page walker, e.g., walk_page_range_novma(), is a little bit complex and doesn't guarantee the IRQ-safe. The follow_page() is only for the user-virtual address. So a simpler page walk function is implemented here. Kan Liang (11): perf/core: Add PERF_SAMPLE_DATA_PAGE_SIZE perf/x86/intel: Support PERF_SAMPLE_DATA_PAGE_SIZE tools headers UAPI: Update tools's copy of linux/perf_event.h perf record: Support new sample type for data page size perf script: Use ULL for enum perf_output_field perf script: Support data page size perf sort: Add sort option for data page size perf mem: Factor out a function to generate sort order perf mem: Clean up output format perf mem: Support data page size perf test: Add test case for PERF_SAMPLE_DATA_PAGE_SIZE Stephane Eranian (5): perf/core: Add support for PERF_SAMPLE_CODE_PAGE_SIZE perf tools: Add support for PERF_SAMPLE_CODE_PAGE_SIZE perf script: Add support for PERF_SAMPLE_CODE_PAGE_SIZE perf report: Add support for PERF_SAMPLE_CODE_PAGE_SIZE perf test: Add test case for PERF_SAMPLE_CODE_PAGE_SIZE arch/x86/events/intel/ds.c | 11 +- include/linux/perf_event.h | 2 + include/uapi/linux/perf_event.h | 6 +- kernel/events/core.c | 132 ++++++++++++++++++- tools/include/uapi/linux/perf_event.h | 6 +- tools/perf/Documentation/perf-mem.txt | 3 + tools/perf/Documentation/perf-record.txt | 6 + tools/perf/Documentation/perf-report.txt | 2 + tools/perf/Documentation/perf-script.txt | 5 +- tools/perf/builtin-mem.c | 150 ++++++++++++---------- tools/perf/builtin-record.c | 4 + tools/perf/builtin-script.c | 90 ++++++++----- tools/perf/tests/sample-parsing.c | 10 +- tools/perf/util/event.h | 5 + tools/perf/util/evsel.c | 18 +++ tools/perf/util/hist.c | 5 + tools/perf/util/hist.h | 2 + tools/perf/util/machine.c | 7 +- tools/perf/util/map_symbol.h | 1 + tools/perf/util/perf_event_attr_fprintf.c | 2 +- tools/perf/util/record.h | 2 + tools/perf/util/session.c | 26 ++++ tools/perf/util/sort.c | 56 ++++++++ tools/perf/util/sort.h | 3 + tools/perf/util/synthetic-events.c | 16 +++ 25 files changed, 456 insertions(+), 114 deletions(-) -- 2.17.1
