diff --git a/src/backend/backend.c b/src/backend/backend.c
index 36f80cc6..da1fa429 100644
--- a/src/backend/backend.c
+++ b/src/backend/backend.c
@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: MPL-2.0
 // Copyright (c) Yuxuan Shui <yshuiv7@gmail.com>
+#include <inttypes.h>
 #include <xcb/sync.h>
 #include <xcb/xcb.h>
 
@@ -82,6 +83,9 @@ void handle_device_reset(session_t *ps) {
 
 /// paint all windows
 void paint_all_new(session_t *ps, struct managed_win *t) {
+	struct timespec now = get_time_timespec();
+	auto paint_all_start_us =
+	    (uint64_t)now.tv_sec * 1000000UL + (uint64_t)now.tv_nsec / 1000;
 	if (ps->backend_data->ops->device_status &&
 	    ps->backend_data->ops->device_status(ps->backend_data) != DEVICE_STATUS_NORMAL) {
 		return handle_device_reset(ps);
@@ -96,6 +100,12 @@ void paint_all_new(session_t *ps, struct managed_win *t) {
 			ps->xsync_exists = false;
 		}
 	}
+
+	now = get_time_timespec();
+	auto after_sync_fence_us =
+	    (uint64_t)now.tv_sec * 1000000UL + (uint64_t)now.tv_nsec / 1000;
+	log_trace("Time spent on sync fence: %" PRIu64 " us",
+	          after_sync_fence_us - paint_all_start_us);
 	// All painting will be limited to the damage, if _some_ of
 	// the paints bleed out of the damage region, it will destroy
 	// part of the image we want to reuse
@@ -176,17 +186,17 @@ void paint_all_new(session_t *ps, struct managed_win *t) {
 	region_t reg_shadow_clip;
 	pixman_region32_init(&reg_shadow_clip);
 
-	struct timespec now;
-	clock_gettime(CLOCK_MONOTONIC, &now);
-	auto now_us = (uint64_t)(now.tv_sec * 1000000 + now.tv_nsec / 1000);
+	now = get_time_timespec();
+	auto after_damage_us = (uint64_t)now.tv_sec * 1000000UL + (uint64_t)now.tv_nsec / 1000;
+	log_trace("Getting damage took %" PRIu64 " us", after_damage_us - after_sync_fence_us);
 	if (ps->next_render > 0) {
-		log_trace("Render schedule deviation: %ld us (%s) %ld %ld",
-		          labs((int64_t)now_us - (int64_t)ps->next_render),
-		          now_us < ps->next_render ? "early" : "late", now_us,
-		          ps->next_render);
+		log_trace("Render schedule deviation: %ld us (%s) %" PRIu64 " %ld",
+		          labs((long)after_damage_us - (long)ps->next_render),
+		          after_damage_us < ps->next_render ? "early" : "late",
+		          after_damage_us, ps->next_render);
 		ps->last_schedule_delay = 0;
-		if (now_us > ps->next_render) {
-			ps->last_schedule_delay = now_us - ps->next_render;
+		if (after_damage_us > ps->next_render) {
+			ps->last_schedule_delay = after_damage_us - ps->next_render;
 		}
 	}
 	ps->did_render = true;