Opetimize the description for dfx overview.

Signed-off-by: Nxuyong <xuyong59@huawei.com>

en/device-dev/subsystems/subsys-dfx-overview.md

@@ -5,14 +5,16 @@
 The DFX subsystem provides the following functions:
 
 - HiLog: implements the logging function. It is applicable to mini-system devices \(reference memory ≥ 128 KiB\), small-system devices \(reference memory ≥ 1 MiB\), and standard-system devices \(reference memory ≥ 128 MB\).
-
 - HiTraceChain: implements distributed call chain tracing. It is applicable to standard-system devices \(reference memory ≥ 128 MiB\).
+- HiTraceMeter: implements performance trace. It is applicable to standard-system devices \(reference memory ≥ 128 MiB\).
 - HiCollie: implements thread suspension detection. It is applicable to standard-system devices \(reference memory ≥ 128 MiB\).
 - HiSysEvent: implements system event logging. It is applicable to standard-system devices \(reference memory ≥ 128 MiB\).
-- HiChecker: implements defect scanning. It is applicable to standard-system devices \(reference memory ≥ 128 MiB\).
 - HiDumper: exports system information. It is applicable to standard-system devices \(reference memory ≥ 128 MiB\).
 - FaultLogger: implements crash detection. It is applicable to standard-system devices \(reference memory ≥ 128 MiB\).
 - Hiview: implements device maintenance across different platforms. It is applicable to standard-system devices \(reference memory ≥ 128 MiB\).
+- HiAppEvent and HiChecker are only hap developer oriented。
+
+![dfx features overview](figure/dfx-overview.png)
 
 ## Basic Concepts<a name="section5635178134811"></a>
 

zh-cn/device-dev/subsystems/subsys-dfx-overview.md

@@ -7,9 +7,7 @@
 
 提供以下功能：
 
-- HiLog流水日志，标准系统类设备（参考内存≥128MB）适用。
-
-- HiLog_Lite轻量化流水日志，轻量系统类设备（参考内存≥128KiB）、小型系统类设备（参考内存≥1MiB）适用。
+- HiLog流水日志，轻量系统类设备（参考内存≥128KiB）、小型系统类设备（参考内存≥1MiB）适用、标准系统类设备（参考内存≥128MB）适用。
 
 - HiTraceChain分布式跟踪，标准系统类设备（参考内存≥128MiB）适用。
 
@@ -25,6 +23,9 @@
 
 - Hiview插件平台，标准系统类设备（参考内存≥128MB）适用。
 
+- HiAppEvent应用事件及HiChecker缺陷扫描仅供应用开发者使用。
+
+![dfx特性概览](figures/dfx-overview.png)
 
 ## 基本概念