make running_time more accurate

runtime/include/sandbox_set_as_running.h

@@ -40,11 +40,11 @@ sandbox_set_as_running(struct sandbox *sandbox, sandbox_state_t last_state)
 	}
 	}
 
-	sandbox->last_state_change_timestamp = now;
-	sandbox->state                       = SANDBOX_RUNNING;
-
 	/* State Change Bookkeeping */
 	sandbox_state_log_transition(sandbox->id, last_state, SANDBOX_RUNNING);
 	runtime_sandbox_total_increment(SANDBOX_RUNNING);
 	runtime_sandbox_total_decrement(last_state);
+	
+	sandbox->last_state_change_timestamp = now;
+	sandbox->state                       = SANDBOX_RUNNING;
 }

runtime/src/software_interrupt.c

@@ -192,6 +192,8 @@ software_interrupt_handle_signals(int signal_type, siginfo_t *signal_info, void
 		debuglog("Restoring sandbox: %lu, Stack %llu\n", current_sandbox->id,
 		         current_sandbox->ctxt.mctx.gregs[REG_RSP]);
 #endif
+		uint64_t now = __getcycles();
+		current_sandbox->last_state_change_timestamp = now;
 		arch_mcontext_restore(&user_context->uc_mcontext, &current_sandbox->ctxt);
 		goto done;
 	}