Hi Arnaldo, On Fri, 7 Aug 2020 at 01:16, Leo Yan <[email protected]> wrote: > > This patch set is to enable Arm arch timer counter and Arm SPE is the > first customer to use arch timer counter for its timestamp. > > Patches 01 ~ 03 enables Arm arch timer counter in Perf tool; patch 01 is > to retrieve arch timer's parameters from mmaped page; patch 02 provides > APIs for the conversion between arch timer's counter and time; patch 03 > adds a test for patches 01 and 02. > > As the first customer to use Arm arch timer counter in perf tool, patch > 04 is to generate sample's timestamp for ARM SPE AUX trace data. > > This patch set has been rebased on perf/core branch with the latest > commit c4735d990268 ("perf evsel: Don't set > sample_regs_intr/sample_regs_user for dummy event").
The ARM SPE perf tools code is orphan and I don't have the cycles to pick it up. Leo has spent a lot of time in that code and as such I suggest that he starts maintaining it, probably following the same kind of arrangement you and I have for coresight. Thanks, Mathieu > > After changes: > > # perf test 67 -v > 67: Convert perf time to arch timer counter > --- start --- > test child forked, pid 5463 > mmap size 528384B > 1st event perf time 2231755083020 arch timer cnt 113097053477 > test time 2231755087460 arch timer cnt 113097053699 > 2nd event perf time 2231755090680 arch timer cnt 113097053860 > test child finished with 0 > ---- end ---- > > Reports the SPE sample with timestamp: > > $ perf script -F,+time > dd 6799 [034] 25496.733475: 1 l1d-access: > ffff87f37b88 _dl_start+0x288 (/usr/lib/aarch64-linux-gnu/ld-2.28.so) > dd 6799 [034] 25496.733475: 1 tlb-access: > ffff87f37b88 _dl_start+0x288 (/usr/lib/aarch64-linux-gnu/ld-2.28.so) > dd 6799 [034] 25496.733479: 1 l1d-access: > ffff87f37c74 _dl_start+0x374 (/usr/lib/aarch64-linux-gnu/ld-2.28.so) > dd 6799 [034] 25496.733479: 1 tlb-access: > ffff87f37c74 _dl_start+0x374 (/usr/lib/aarch64-linux-gnu/ld-2.28.so) > dd 6799 [034] 25496.733485: 1 l1d-access: > ffff87f49af4 __GI___tunables_init+0x3c (/usr/lib/aarch64-linux-gnu/ld-2.28.so) > dd 6799 [034] 25496.733485: 1 tlb-access: > ffff87f49af4 __GI___tunables_init+0x3c (/usr/lib/aarch64-linux-gnu/ld-2.28.so) > > Changes from v1: > * Rebased on the latest perf/core branch; > * Added a testing for Arm timer counter conversion (Ian Rogers). > > > Leo Yan (4): > perf tools: Support Arm arch timer counter > perf arm_arch_timer: Convert between counter and timestamp > perf arm_arch_timer: Test conversion between counter and timestamp > perf arm-spe: Enable timestamp with arch timer counter > > tools/perf/arch/arm64/include/arch-tests.h | 6 + > tools/perf/arch/arm64/tests/Build | 1 + > tools/perf/arch/arm64/tests/arch-tests.c | 4 + > .../tests/perf-time-to-arch-timer-counter.c | 189 ++++++++++++++++++ > tools/perf/arch/arm64/util/Build | 1 + > tools/perf/arch/arm64/util/arch_timer.c | 50 +++++ > tools/perf/arch/arm64/util/arm-spe.c | 17 ++ > tools/perf/util/Build | 1 + > tools/perf/util/arm-spe.c | 16 +- > tools/perf/util/arm-spe.h | 5 + > tools/perf/util/arm_arch_timer.c | 28 +++ > tools/perf/util/arm_arch_timer.h | 23 +++ > 12 files changed, 339 insertions(+), 2 deletions(-) > create mode 100644 > tools/perf/arch/arm64/tests/perf-time-to-arch-timer-counter.c > create mode 100644 tools/perf/arch/arm64/util/arch_timer.c > create mode 100644 tools/perf/util/arm_arch_timer.c > create mode 100644 tools/perf/util/arm_arch_timer.h > > -- > 2.17.1 >
