diff --git a/demo/demo1.mp4 b/demo/demo1.mp4
new file mode 100644
index 0000000000000000000000000000000000000000..956220f2d4f8e6e3e895ed09e0d35fd8acab1d43
Binary files /dev/null and b/demo/demo1.mp4 differ
diff --git a/gopher_tech.md b/gopher_tech.md
index 04e07f87418960479eb8614f1b8e9d060824e00c..305bab9420c72ab377d56a029f114d7ee6d9cd8c 100644
--- a/gopher_tech.md
+++ b/gopher_tech.md
@@ -183,6 +183,8 @@
 | bio_err_count         | proc_io(0x400)           | Gauge        |      |      | Number of I/O operation failures at the BIO layer.           |
 | hang_count            | proc_io(0x400)           | Gauge        |      |      | Number of process hang times.                                |
 | iowait_us             | proc_io(0x400)           | Gauge        | us   |      | Process IO_wait time (unit: us).                             |
+| sched_systime         | sched_systime            | Gauge        | us   |      | Duration of the process in the system state due to scheduling delay. |
+| sched_syscall         | sched_syscall            | Gauge        | us   |      | Process syscall delay due to scheduling preemption.          |
 
 # BLOCK
 
diff --git a/gopher_tech_abnormal.md b/gopher_tech_abnormal.md
index 70a2c108de18dc4316330edc18fc50871f57424c..7a41c70c1a1752c7980391a2207582fab659c16c 100644
--- a/gopher_tech_abnormal.md
+++ b/gopher_tech_abnormal.md
@@ -402,6 +402,8 @@ gala-gopher提供系统异常检测能力，支持用户在启动各个探针的
 | iowait_us          | Process(COMM:%s PID:%u) iowait %llu us.                      | P1: process name P2: process id P3: io-wait times            | [-T <>]  | WARN     |
 | hang_count         | Process(COMM:%s PID:%u) hang count %u.                       | P1: process name P2: process id P3: error count              | NA       | WARN     |
 | bio_err_count      | Process(COMM:%s PID:%u) bio error %u.                        | P1: process name P2: process id P3: error count              | NA       | WARN     |
+| sched_systime      | CPU %s sys-state.(CPU = %d, Comm = %s, PID = %u, Latency = %llums) |                                                              | NA       | WARN     |
+| sched_syscall      | COMM: %s syscall %s.(CPU = %d, PID = %u, SYSID = %u, Latency = %llums, Delay = %llums) |                                                              | NA       | WARN     |
 
 ### BLOCK