diff options
Diffstat (limited to 'tools/perf/util/intel-pt-decoder/intel-pt-decoder.c')
| -rw-r--r-- | tools/perf/util/intel-pt-decoder/intel-pt-decoder.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c index cb2520abf261..5ab631702769 100644 --- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c +++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c @@ -41,8 +41,11 @@ #define INTEL_PT_RETURN 1 -/* Maximum number of loops with no packets consumed i.e. stuck in a loop */ -#define INTEL_PT_MAX_LOOPS 10000 +/* + * Default maximum number of loops with no packets consumed i.e. stuck in a + * loop. + */ +#define INTEL_PT_MAX_LOOPS 100000 struct intel_pt_blk { struct intel_pt_blk *prev; @@ -220,6 +223,7 @@ struct intel_pt_decoder { uint64_t timestamp_insn_cnt; uint64_t sample_insn_cnt; uint64_t stuck_ip; + int max_loops; int no_progress; int stuck_ip_prd; int stuck_ip_cnt; @@ -315,6 +319,7 @@ struct intel_pt_decoder *intel_pt_decoder_new(struct intel_pt_params *params) decoder->vm_tm_corr_dry_run = params->vm_tm_corr_dry_run; decoder->first_timestamp = params->first_timestamp; decoder->last_reliable_timestamp = params->first_timestamp; + decoder->max_loops = params->max_loops ? params->max_loops : INTEL_PT_MAX_LOOPS; decoder->flags = params->flags; @@ -483,7 +488,7 @@ static const char *intel_pt_err_msgs[] = { [INTEL_PT_ERR_OVR] = "Overflow packet", [INTEL_PT_ERR_LOST] = "Lost trace data", [INTEL_PT_ERR_UNK] = "Unknown error!", - [INTEL_PT_ERR_NELOOP] = "Never-ending loop", + [INTEL_PT_ERR_NELOOP] = "Never-ending loop (refer perf config intel-pt.max-loops)", }; int intel_pt__strerror(int code, char *buf, size_t buflen) @@ -1168,7 +1173,7 @@ static int intel_pt_walk_insn(struct intel_pt_decoder *decoder, decoder->stuck_ip = decoder->state.to_ip; decoder->stuck_ip_prd = 1; decoder->stuck_ip_cnt = 1; - } else if (cnt > INTEL_PT_MAX_LOOPS || + } else if (cnt > decoder->max_loops || decoder->state.to_ip == decoder->stuck_ip) { intel_pt_log_at("ERROR: Never-ending loop", decoder->state.to_ip); |