lkml.org 
[lkml]   [2018]   [Jul]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Subject[PATCH 0/6] coresight: perf: Support for tmc-etr backed buffers
    Date
    This series adds the support for using the tmc-etr in perf mode for
    storing the trace to system RAM. The ETR uses a separate buffer (double
    buffering) for storing the trace. This is copied back to the ring buffer
    when the event is stopped. We try to match the ETR buffer to the larger
    of perf ring buffer or the size configured for the ETR via sysfs. This
    allows tuning the buffer size to prevent overflows and loosing trace
    data, as we don't have overflow interrupt support (yet).

    Applies on coresight/next

    Changes since [0] :
    - Drop buffer rotation logic for etr-buf
    - Do not use perf ring buffer. (Add support later)
    - Fix handling of sink, preventing mixed modes of operation.

    [0] - TMC ETR perf support
    - http://lists.infradead.org/pipermail/linux-arm-kernel/2018-May/574875.html

    Suzuki K Poulose (6):
    coresight: Fix handling of sinks
    coresight: tmc-etr: Handle driver mode specific ETR buffers
    coresight: tmc-etr: Relax collection of trace from sysfs mode
    coresight: Convert driver messages to dev_dbg
    coresight: perf: Remove reset_buffer call back for sinks
    coresight: etm-perf: Add support for ETR backend

    .../coresight/coresight-dynamic-replicator.c | 4 +-
    drivers/hwtracing/coresight/coresight-etb10.c | 62 +---
    drivers/hwtracing/coresight/coresight-etm-perf.c | 9 +-
    drivers/hwtracing/coresight/coresight-etm3x.c | 4 +-
    drivers/hwtracing/coresight/coresight-etm4x.c | 4 +-
    drivers/hwtracing/coresight/coresight-funnel.c | 4 +-
    drivers/hwtracing/coresight/coresight-replicator.c | 4 +-
    drivers/hwtracing/coresight/coresight-stm.c | 4 +-
    drivers/hwtracing/coresight/coresight-tmc-etf.c | 66 +---
    drivers/hwtracing/coresight/coresight-tmc-etr.c | 337 +++++++++++++++++++--
    drivers/hwtracing/coresight/coresight-tmc.c | 4 +-
    drivers/hwtracing/coresight/coresight-tmc.h | 4 +
    drivers/hwtracing/coresight/coresight-tpiu.c | 4 +-
    drivers/hwtracing/coresight/coresight.c | 22 +-
    include/linux/coresight.h | 5 +-
    15 files changed, 375 insertions(+), 162 deletions(-)

    --
    2.7.4

    \
     
     \ /
      Last update: 2018-07-11 16:17    [W:4.524 / U:0.012 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site