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perf intel-pt/bts: Report instruction bytes and length in sample 

Change Intel PT and BTS to pass up the length and the instruction
bytes of the decoded or sampled instruction in the perf sample.

The decoder already knows this information, we just need to pass it
up. Since it is only a couple of movs it is not very expensive.

Handle instruction cache too. Make sure ilen is always initialized.

Used in the next patch.

[Adrian: re-base on top (and adjust for) instruction buffer size tidy-up]
[Adrian: add BTS support and adjust commit message accordingly]

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Link: http://lkml.kernel.org/r/1475847747-30994-3-git-send-email-adrian.hunter@intel.com
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen 2016-10-07 16:42:26 +03:00 committed by Arnaldo Carvalho de Melo
parent 32f98aab75
commit faaa87680b
6 changed files with 19 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
tools/perf/util/event.h
View File

@ -177,6 +177,8 @@ enum {
PERF_IP_FLAG_TRACE_BEGIN |\
PERF_IP_FLAG_TRACE_END)
#define MAX_INSN 16
struct perf_sample {
u64 ip;
u32 pid, tid;
@ -193,6 +195,7 @@ struct perf_sample {
u32 flags;
u16 insn_len;
u8 cpumode;
char insn[MAX_INSN];
void *raw_data;
struct ip_callchain *callchain;
struct branch_stack *branch_stack;

1
tools/perf/util/intel-bts.c
View File

@ -295,6 +295,7 @@ static int intel_bts_synth_branch_sample(struct intel_bts_queue *btsq,
sample.cpu = btsq->cpu;
sample.flags = btsq->sample_flags;
sample.insn_len = btsq->intel_pt_insn.length;
memcpy(sample.insn, btsq->intel_pt_insn.buf, INTEL_PT_INSN_BUF_SZ);
if (bts->synth_opts.inject) {
event.sample.header.size = bts->branches_event_size;

2
tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
View File

@ -980,6 +980,8 @@ out:
out_no_progress:
decoder->state.insn_op = intel_pt_insn->op;
decoder->state.insn_len = intel_pt_insn->length;
memcpy(decoder->state.insn, intel_pt_insn->buf,
INTEL_PT_INSN_BUF_SZ);
if (decoder->tx_flags & INTEL_PT_IN_TX)
decoder->state.flags |= INTEL_PT_IN_TX;

1
tools/perf/util/intel-pt-decoder/intel-pt-decoder.h
View File

@ -66,6 +66,7 @@ struct intel_pt_state {
uint32_t flags;
enum intel_pt_insn_op insn_op;
int insn_len;
char insn[INTEL_PT_INSN_BUF_SZ];
};
struct intel_pt_insn;

2
tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c
View File

@ -27,7 +27,7 @@
#include "intel-pt-insn-decoder.h"
#if INTEL_PT_INSN_BUF_SZ < MAX_INSN_SIZE
#if INTEL_PT_INSN_BUF_SZ < MAX_INSN_SIZE || INTEL_PT_INSN_BUF_SZ > MAX_INSN
#error Instruction buffer size too small
#endif

11
tools/perf/util/intel-pt.c
View File

@ -143,6 +143,7 @@ struct intel_pt_queue {
u32 flags;
u16 insn_len;
u64 last_insn_cnt;
char insn[INTEL_PT_INSN_BUF_SZ];
};
static void intel_pt_dump(struct intel_pt *pt __maybe_unused,
@ -315,6 +316,7 @@ struct intel_pt_cache_entry {
enum intel_pt_insn_branch branch;
int length;
int32_t rel;
char insn[INTEL_PT_INSN_BUF_SZ];
};
static int intel_pt_config_div(const char *var, const char *value, void *data)
@ -400,6 +402,7 @@ static int intel_pt_cache_add(struct dso *dso, struct machine *machine,
e->branch = intel_pt_insn->branch;
e->length = intel_pt_insn->length;
e->rel = intel_pt_insn->rel;
memcpy(e->insn, intel_pt_insn->buf, INTEL_PT_INSN_BUF_SZ);
err = auxtrace_cache__add(c, offset, &e->entry);
if (err)
@ -436,6 +439,8 @@ static int intel_pt_walk_next_insn(struct intel_pt_insn *intel_pt_insn,
u64 insn_cnt = 0;
bool one_map = true;
intel_pt_insn->length = 0;
if (to_ip && *ip == to_ip)
goto out_no_cache;
@ -475,6 +480,8 @@ static int intel_pt_walk_next_insn(struct intel_pt_insn *intel_pt_insn,
intel_pt_insn->branch = e->branch;
intel_pt_insn->length = e->length;
intel_pt_insn->rel = e->rel;
memcpy(intel_pt_insn->buf, e->insn,
INTEL_PT_INSN_BUF_SZ);
intel_pt_log_insn_no_data(intel_pt_insn, *ip);
return 0;
}
@ -898,6 +905,7 @@ static void intel_pt_sample_flags(struct intel_pt_queue *ptq)
if (ptq->state->flags & INTEL_PT_IN_TX)
ptq->flags |= PERF_IP_FLAG_IN_TX;
ptq->insn_len = ptq->state->insn_len;
memcpy(ptq->insn, ptq->state->insn, INTEL_PT_INSN_BUF_SZ);
}
}
@ -1078,6 +1086,7 @@ static int intel_pt_synth_branch_sample(struct intel_pt_queue *ptq)
sample.cpu = ptq->cpu;
sample.flags = ptq->flags;
sample.insn_len = ptq->insn_len;
memcpy(sample.insn, ptq->insn, INTEL_PT_INSN_BUF_SZ);
/*
* perf report cannot handle events without a branch stack when using
@ -1139,6 +1148,7 @@ static int intel_pt_synth_instruction_sample(struct intel_pt_queue *ptq)
sample.cpu = ptq->cpu;
sample.flags = ptq->flags;
sample.insn_len = ptq->insn_len;
memcpy(sample.insn, ptq->insn, INTEL_PT_INSN_BUF_SZ);
ptq->last_insn_cnt = ptq->state->tot_insn_cnt;
@ -1201,6 +1211,7 @@ static int intel_pt_synth_transaction_sample(struct intel_pt_queue *ptq)
sample.cpu = ptq->cpu;
sample.flags = ptq->flags;
sample.insn_len = ptq->insn_len;
memcpy(sample.insn, ptq->insn, INTEL_PT_INSN_BUF_SZ);
if (pt->synth_opts.callchain) {
thread_stack__sample(ptq->thread, ptq->chain,