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    Subject[PATCH 4/5] perf_counter: PERF_RECORD_CONFIG
    Much like CONFIG_RECORD_GROUP records the hw_event.config to identify the
    values, allow to record this for all counters.

    Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
    ---
    include/linux/perf_counter.h | 2 ++
    kernel/perf_counter.c | 8 ++++++++
    2 files changed, 10 insertions(+)

    Index: linux-2.6/include/linux/perf_counter.h
    ===================================================================
    --- linux-2.6.orig/include/linux/perf_counter.h
    +++ linux-2.6/include/linux/perf_counter.h
    @@ -104,6 +104,7 @@ enum perf_counter_record_format {
    PERF_RECORD_ADDR = 1U << 3,
    PERF_RECORD_GROUP = 1U << 4,
    PERF_RECORD_CALLCHAIN = 1U << 5,
    + PERF_RECORD_CONFIG = 1U << 6,
    };

    /*
    @@ -258,6 +259,7 @@ enum perf_event_type {
    * { u32 pid, tid; } && PERF_RECORD_TID
    * { u64 time; } && PERF_RECORD_TIME
    * { u64 addr; } && PERF_RECORD_ADDR
    + * { u64 config; } && PERF_RECORD_CONFIG
    *
    * { u64 nr;
    * { u64 event, val; } cnt[nr]; } && PERF_RECORD_GROUP
    Index: linux-2.6/kernel/perf_counter.c
    ===================================================================
    --- linux-2.6.orig/kernel/perf_counter.c
    +++ linux-2.6/kernel/perf_counter.c
    @@ -1992,6 +1992,11 @@ static void perf_counter_output(struct p
    header.size += sizeof(u64);
    }

    + if (record_type & PERF_RECORD_CONFIG) {
    + header.type |= PERF_RECORD_CONFIG;
    + header.size += sizeof(u64);
    + }
    +
    if (record_type & PERF_RECORD_GROUP) {
    header.type |= PERF_RECORD_GROUP;
    header.size += sizeof(u64) +
    @@ -2027,6 +2032,9 @@ static void perf_counter_output(struct p
    if (record_type & PERF_RECORD_ADDR)
    perf_output_put(&handle, addr);

    + if (record_type & PERF_RECORD_CONFIG)
    + perf_output_put(&handle, counter->hw_event.config);
    +
    /*
    * XXX PERF_RECORD_GROUP vs inherited counters seems difficult.
    */
    --



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