case PERF_RECORD_AUXTRACE_INFO:
return tool->auxtrace_info(session, event);
case PERF_RECORD_AUXTRACE:
- /* setup for reading amidst mmap */
- lseek(fd, file_offset + event->header.size, SEEK_SET);
+ /*
+ * Setup for reading amidst mmap, but only when we
+ * are in 'file' mode. The 'pipe' fd is in proper
+ * place already.
+ */
+ if (!perf_data__is_pipe(session->data))
+ lseek(fd, file_offset + event->header.size, SEEK_SET);
return tool->auxtrace(session, event);
case PERF_RECORD_AUXTRACE_ERROR:
perf_session__auxtrace_error_inc(session, event);