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3.14. sample_hbmem 使用说明

3.14.1. 功能概述

本说明文档旨在详细介绍 sample_hbmem 的使用方法，包括其主要功能、源码结构、软件架构以及API流程。本示例主要集中在 hbmem API 的应用，特别是涉及 Com Buffer 、Graphic Buffer 和 Share Pool 的创建与使用，以及多进程间的共享机制。

sample_hbmem 主要功能是提供 hbmem API 的示例，涵盖以下内容：

• Com Buffer 的创建与管理：提供了创建、管理和销毁共享通信缓冲区的能力，这些缓冲区用于多个进程之间的数据交换，有效支持进程间的协作

• Graphic Buffer 的创建与使用：提供了如何创建并管理图形缓冲区，包括对图形数据的配置、操作和转换，能够满足视觉数据处理中对内存的动态需求。

• Share Pool 的使用：实现了共享内存池的分配与释放策略，通过共享内存池优化了资源的利用率，降低了创建和销毁缓冲区时的开销，提高了内存管理的灵活性。

3.14.1.1. 软件架构说明

本 sample 基于 libhbmem API 实现，libhbmem 是一套基于 ION 的内存管理库，它提供了内存分配、共享、回收等功能，并提供了统一的 API 接口，使得应用开发者能够更加方便地管理内存，提高内存的利用率，实现不同 buffer 类型的内存申请和进程间共享。具体架构图参见下图软件架构说明。

3.14.1.2. 背景知识

可以查看 ION 系统调试指南 章节进行了解。

3.14.1.3. API 流程说明

libhbmem 提供了一系列的 API 接口，包括：libhbmem 库调用 ION 进行 buffer 分配

以下是 sample_hbmem 示例中包含了 Alloc Com Buffer 、Alloc Graph Buffer 、 Share Pool 等对 hbmem API 的使用，并展示了各个 API 的分配使用流程图

• Alloc Com Buf：分配共享通信缓冲区，用于多个进程之间的数据交换，有效支持进程间的协作。

• Alloc Com Buf With Heapmask：分配共享通信缓冲区，并指定 heapmask，用于指定缓冲区分配到指定的 heap 上。

• Alloc Graph Buf：分配图像缓存，包括对图像数据的配置、操作和转换，能够满足视觉数据处理中对内存的动态需求。

• Alloc Graph Buf With Heapmask：分配图像缓存，并指定 heapmask，用于指定缓冲区分配到指定的 heap 上。

• Share Com Buffer：共享通信缓冲区，用于多个进程之间的数据交换，有效支持进程间的协作。

• Share Graph Buffer：共享图像缓存，包括对图像数据的配置、操作和转换，能够满足视觉数据处理中对内存的动态需求。

• Share Pool：共享内存池，实现了共享内存池的分配与释放策略，通过共享内存池优化了资源的利用率，降低了创建和销毁缓冲区时的开销，提高了内存管理的灵活性。

• Share Com Buffer Fork Process Scenario：创建子进程时，共享通信缓冲区的使用。

3.14.2. 编译部署

3.14.2.1. 源码结构

1. 代码路径：/app/samples/platform_samples/sample_hbmem
2. 目录结构：
sample_hbmem/
├── .gitignore
├── Makefile
├── sample_alloc.c
├── sample_common.c
├── sample_common.h
├── sample_pool.c
├── sample_queue.c
├── sample_share_pool.c
├── sample_share.c
└── sample.c

3.14.2.2. 编译说明

本sample主要依赖 libhbmem 提供的头文件：

#include <hb_mem_mgr.h>
#include <hb_mem_err.h>

编译依赖的库如下：

LIBS += -lhbmem -lpthread -lalog -ldl -lstdc++

3.14.2.3. 编译环境

• 进入 app/samples/platform_samples/sample_hbmem 目录，执行 make 编译

• 编译成功后输出的可执行文件为 sample_hbmem

• 详细程序编译方式请查阅 编译方法 章节

把 sample_hbmem 上传到开发板之后，运行 chmod 777 sample_hbmem 命令给程序赋予可执行权限。

3.14.3. 运行

部署完 sample_hbmem 之后直接执行程序 ./sample_hbmem 可以获得帮助信息和支持的hbmem列表：

# ./sample_hbmem
Options:
  -m                     Specify sample use cases 
  -h                     Show this help message
Usage: ./sample_hbmem -m <index>
***************  Sample Mode Lists  ***************
index:  1       sample_mode:    Alloc Com Buf
index:  2       sample_mode:    Alloc Com Buf With Cache
index:  3       sample_mode:    Alloc Com Buf With Heapmask
index:  4       sample_mode:    Alloc Graph Buf
index:  5       sample_mode:    Alloc Graph Buf With Heapmask
index:  6       sample_mode:    Share Com Buffer
index:  7       sample_mode:    Share Com Buffer Fork Process Scenario
index:  8       sample_mode:    Share Graph Buffer
index:  9       sample_mode:    Share Graph Buffer Fork Process Scenario
index:  10      sample_mode:    Share Pool Fork Process Scenario
index:  11      sample_mode:    Share Pool
index:  12      sample_mode:    Change Com Graph Buf
***************************************************

根据提示选择需要使用的 Mode 编号，即可运行对应的示例。以 Alloc Com Buf 为例，执行 ./sample_hbmem -m 1，即会创建 Alloc Com Buf 示例。

3.14.3.1. 命令解释

• -m： 指定sample用例，具体见运行结果展示

• -h： 帮助说明

3.14.3.2. 测试结果说明

• 如果log最后以 xxxx done 结尾，则表示 sample 执行成功。

3.14.3.3. 运行结果展示

理解运行命令需要一些基础知识，这里做一个简要的说明：

/sys/kernel/debug/ion/clients/ 目录可以查看当前系统申请了 ION 内存的 Client 集合（除了 BPU 子系统）,

比如有一个 1114 的进程申请并使用了 ION 那么该目录下就会显示一个 1114-0 的文件节点。而 cma_reserved、

carveout、ion_cma 等都是针对 ION 不同区域的名字。读者可以先阅读背景知识之后，再回来继续查看。

• 创建 Com Buf

# ./sample_hbmem -m 1
sample_mode = 1
=================================================
Ready to sample_alloc_com_buf
alloc com buf, share_id: 7
[1432:1432] Do system command cat /sys/kernel/debug/ion/clients/1432*.
       heap_name:    size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
         ion_cma:           400000 :                1 :                1 :         d4b2ed6c :                3:                7 :                1

-------------------------------------------------------------------------
          total            400000
-------------------------------------------------------------------------
[1432:1432] Do system command cat /sys/kernel/debug/ion/heaps/ion_cma | grep -w 1432 | grep -w sample_hbmem.
         ion_cma     sample_hbmem             1432          4194304
    sample_hbmem             1432            other          4194304 0
[1432:1432] Result 0.
free com buf
[1432:1432] Do system command cat /sys/kernel/debug/ion/clients/1432*.
       heap_name:    size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
-------------------------------------------------------------------------
          total                 0
-------------------------------------------------------------------------
[1432:1432] Do system command cat /sys/kernel/debug/ion/heaps/ion_cma | grep -w 1432 | grep -w sample_hbmem.
[1432:1432] Result 256.
sample_alloc_com_buf done
=================================================

• 创建 Com Buf With Cache

# ./sample_hbmem -m 2
sample_mode = 2
=================================================
Ready to sample_alloc_com_buf_with_cache
memset uncached buf(size:4194304) use time: 691673
memset   cached buf(size:4194304) use time: 457194
sample_alloc_com_buf_with_cache done
=================================================

• 在各个 heaps 里创建 Com Buffer

# ./sample_hbmem -m 3
sample_mode = 3
=================================================
Ready to sample_alloc_com_buf_with_heapmask
alloc com buf form ion_cma, size: 1048576
[1471:1471] Do system command cat /sys/kernel/debug/ion/clients/1471*.
       heap_name:    size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
         ion_cma:           100000 :                1 :                1 :         27d9b8ed :                3:                7 :                1

-------------------------------------------------------------------------
          total            100000
-------------------------------------------------------------------------
[1471:1471] Do system command cat /sys/kernel/debug/ion/heaps/ion_cma | grep -w 1471 | grep -w sample_hbmem.
         ion_cma     sample_hbmem             1471          1048576
    sample_hbmem             1471            other          1048576 0
[1471:1471] Result 0.
free com buf

alloc com buf form carveout, size: 1048576
[1471:1471] Do system command cat /sys/kernel/debug/ion/clients/1471*.
       heap_name:    size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
        carveout:           100000 :                1 :                1 :         27d9b8ed :                3:                7 :                1

-------------------------------------------------------------------------
          total            100000
-------------------------------------------------------------------------
[1471:1471] Do system command cat /sys/kernel/debug/ion/heaps/carveout | grep -w 1471 | grep -w sample_hbmem.
        carveout     sample_hbmem             1471          1048576
    sample_hbmem             1471            other          1048576 0
[1471:1471] Result 0.
free com buf

alloc com buf form cma_reserved, size: 1048576
[1471:1471] Do system command cat /sys/kernel/debug/ion/clients/1471*.
       heap_name:    size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
    cma_reserved:           100000 :                1 :                1 :         27d9b8ed :                3:                7 :                1

-------------------------------------------------------------------------
          total            100000
-------------------------------------------------------------------------
[1471:1471] Do system command cat /sys/kernel/debug/ion/heaps/cma_reserved | grep -w 1471 | grep -w sample_hbmem.
    cma_reserved     sample_hbmem             1471          1048576
    sample_hbmem             1471            other          1048576 0
[1471:1471] Result 0.
free com buf

sample_alloc_com_buf_with_heapmask done
=================================================

• 创建 Graph Buffer

# ./sample_hbmem -m 4
sample_mode = 4
=================================================
Ready to sample_alloc_graph_buf
graph_buf.plane_cnt: 2, graph_buf.format: 8, graph_buf.width: 1280, graph_buf.height: 720, graph_buf.stride: 0, graph_buf.vstride: 0, graph_buf.stride: 0, graph_buf.flags: 17
[1487:1487] Do system command cat /sys/kernel/debug/ion/clients/1487*.
       heap_name:    size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
         ion_cma:            e1000 :                1 :                1 :         27d9b8ed :                3:                7 :                1

         ion_cma:            71000 :                1 :                1 :         1fe4048d :                3:                8 :                1

-------------------------------------------------------------------------
          total            152000
-------------------------------------------------------------------------
[1487:1487] Do system command cat /sys/kernel/debug/ion/heaps/ion_cma | grep -w 1487 | grep -w sample_hbmem.
         ion_cma     sample_hbmem             1487          1384448
    sample_hbmem             1487            other           921600 0
    sample_hbmem             1487            other           462848 0
[1487:1487] Result 0.
sample_alloc_graph_buf done
=================================================

• 在各个 heaps 里，创建 Graph Buffer

# ./sample_hbmem -m 5
sample_mode = 5
=================================================
Ready to sample_alloc_graph_buf_with_heapmask
alloc graph buf form ion_cma
graph_buf.plane_cnt: 2, graph_buf.format: 8, graph_buf.width: 1280, graph_buf.height: 720, graph_buf.stride: 0, graph_buf.vstride: 0, graph_buf.stride: 0, graph_buf.flags: 17
[1493:1493] Do system command cat /sys/kernel/debug/ion/clients/1493*.
       heap_name:    size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
         ion_cma:            71000 :                1 :                1 :         27d9b8ed :                3:                8 :                1

         ion_cma:            e1000 :                1 :                1 :         1fe4048d :                3:                7 :                1

-------------------------------------------------------------------------
          total            152000
-------------------------------------------------------------------------
[1493:1493] Do system command cat /sys/kernel/debug/ion/heaps/ion_cma | grep -w 1493 | grep -w sample_hbmem.
         ion_cma     sample_hbmem             1493          1384448
    sample_hbmem             1493            other           462848 0
    sample_hbmem             1493            other           921600 0
[1493:1493] Result 0.
alloc graph buf form carveout
graph_buf.plane_cnt: 2, graph_buf.format: 8, graph_buf.width: 1280, graph_buf.height: 720, graph_buf.stride: 0, graph_buf.vstride: 0, graph_buf.stride: 0, graph_buf.flags: 4294967313
[1493:1493] Do system command cat /sys/kernel/debug/ion/clients/1493*.
       heap_name:    size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
        carveout:            e1000 :                1 :                1 :         27d9b8ed :                3:                7 :                1

        carveout:            71000 :                1 :                1 :         1fe4048d :                3:                8 :                1

-------------------------------------------------------------------------
          total            152000
-------------------------------------------------------------------------
[1493:1493] Do system command cat /sys/kernel/debug/ion/heaps/carveout | grep -w 1493 | grep -w sample_hbmem.
        carveout     sample_hbmem             1493          1384448
    sample_hbmem             1493            other           921600 0
    sample_hbmem             1493            other           462848 0
[1493:1493] Result 0.
alloc graph buf form cma_reserved
graph_buf.plane_cnt: 2, graph_buf.format: 8, graph_buf.width: 1280, graph_buf.height: 720, graph_buf.stride: 0, graph_buf.vstride: 0, graph_buf.stride: 0, graph_buf.flags: 17179869201
[1493:1493] Do system command cat /sys/kernel/debug/ion/clients/1493*.
       heap_name:    size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
    cma_reserved:            71000 :                1 :                1 :         27d9b8ed :                3:                8 :                1

    cma_reserved:            e1000 :                1 :                1 :         1fe4048d :                3:                7 :                1

-------------------------------------------------------------------------
          total            152000
-------------------------------------------------------------------------
[1493:1493] Do system command cat /sys/kernel/debug/ion/heaps/cma_reserved | grep -w 1493 | grep -w sample_hbmem.
    cma_reserved     sample_hbmem             1493          1384448
    sample_hbmem             1493            other           462848 0
    sample_hbmem             1493            other           921600 0
[1493:1493] Result 0.
sample_alloc_graph_buf_with_heapmask done
=================================================

• 进程内 Common Buffer 共享

# ./sample_hbmem -m 6
sample_mode = 6
=================================================
Ready to sample_share_com_buffer
alloc com buf, share_id: 7
import com buf, share_id: 7
[1510:1510] Do system command cat /sys/kernel/debug/ion/clients/1510*.
       heap_name:    size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
         ion_cma:            10000 :                2 :                2 :         df1cdf5a :                4:                7 :                2

-------------------------------------------------------------------------
          total             10000
-------------------------------------------------------------------------
[1510:1510] Do system command cat /sys/kernel/debug/ion/heaps/ion_cma | grep -w 1510 | grep -w sample_hbmem.
         ion_cma     sample_hbmem             1510            65536
    sample_hbmem             1510            other            65536 0
[1510:1510] Result 0.
free com buf
[1510:1510] Do system command cat /sys/kernel/debug/ion/clients/1510*.
       heap_name:    size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
         ion_cma:            10000 :                1 :                1 :         df1cdf5a :                3:                7 :                1

-------------------------------------------------------------------------
          total             10000
-------------------------------------------------------------------------
[1510:1510] Do system command cat /sys/kernel/debug/ion/heaps/ion_cma | grep -w 1510 | grep -w sample_hbmem.
         ion_cma     sample_hbmem             1510            65536
    sample_hbmem             1510            other            65536 0
[1510:1510] Result 0.
free import buf
[1510:1510] Do system command cat /sys/kernel/debug/ion/clients/1510*.
       heap_name:    size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
-------------------------------------------------------------------------
          total                 0
-------------------------------------------------------------------------
[1510:1510] Do system command cat /sys/kernel/debug/ion/heaps/ion_cma | grep -w 1510 | grep -w sample_hbmem.
[1510:1510] Result 256.
sample_share_com_buffer done
=================================================

• 进程间 Common Buffer 共享

# ./sample_hbmem -m 7
sample_mode = 7
=================================================
Ready to sample_share_com_buffer_fork_process_scenario
alloc graph buf form ion_cma
socketpair: 0
[1527:902] In parent process.
[1528:1527] In child process.
parent write share buf: parent test common buf share.
share_consume_cnt: 0
[1527:902] parent send msg 1
[1528:1527] child recv msg 1
child read share buf: parent test common buf share.
share_consume_cnt: 1
child write share buf: child test common buf share.
[1528:1527] child send msg 2
[1527:902] parent recv msg 2
parent read share buf: child test common buf share.
[1527:902] parent send msg 3
[1528:1527] child recv msg 3
share_consume_cnt: 0
[1527:902] parent quit
[1528:1527] child quit
alloc graph buf form carveout
socketpair: 0
[1527:902] In parent process.
parent write share buf: parent test common buf share.
share_consume_cnt: 0
[1529:1527] In child process.
[1527:902] parent send msg 1
[1529:1527] child recv msg 1
child read share buf: parent test common buf share.
share_consume_cnt: 1
child write share buf: child test common buf share.
[1529:1527] child send msg 2
[1527:902] parent recv msg 2
parent read share buf: child test common buf share.
[1527:902] parent send msg 3
[1529:1527] child recv msg 3
share_consume_cnt: 0
[1527:902] parent quit
[1529:1527] child quit
alloc graph buf form cma_reserved
socketpair: 0
[1527:902] In parent process.
parent write share buf: parent test common buf share.
share_consume_cnt: 0
[1530:1527] In child process.
[1527:902] parent send msg 1
[1530:1527] child recv msg 1
child read share buf: parent test common buf share.
share_consume_cnt: 1
child write share buf: child test common buf share.
[1530:1527] child send msg 2
[1527:902] parent recv msg 2
parent read share buf: child test common buf share.
[1527:902] parent send msg 3
[1530:1527] child recv msg 3
share_consume_cnt: 0
[1527:902] parent quit
[1530:1527] child quit
sample_share_com_buffer_fork_process_scenario done
=================================================

• 进程内 Graphic Buffer 共享

# ./sample_hbmem -m 8
sample_mode = 8
=================================================
Ready to sample_share_graph_buffer
alloc graph buf, share_id0: 7, share_id1: 8, share_id2: 8
import graph buf, share_id0: 7, share_id1: 8, share_id2: 8
[1531:1531] Do system command cat /sys/kernel/debug/ion/clients/1531*.
       heap_name:    size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
         ion_cma:            e1000 :                2 :                2 :         b65c6afe :                4:                7 :                2

         ion_cma:            71000 :                2 :                2 :         d4b2ed6c :                4:                8 :                2

-------------------------------------------------------------------------
          total            152000
-------------------------------------------------------------------------
[1531:1531] Do system command cat /sys/kernel/debug/ion/heaps/ion_cma | grep -w 1531 | grep -w sample_hbmem.
         ion_cma     sample_hbmem             1531          1384448
    sample_hbmem             1531            other           921600 0
    sample_hbmem             1531            other           462848 0
[1531:1531] Result 0.
free graph buf
[1531:1531] Do system command cat /sys/kernel/debug/ion/clients/1531*.
       heap_name:    size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
         ion_cma:            e1000 :                1 :                1 :         b65c6afe :                3:                7 :                1

         ion_cma:            71000 :                1 :                1 :         d4b2ed6c :                3:                8 :                1

-------------------------------------------------------------------------
          total            152000
-------------------------------------------------------------------------
[1531:1531] Do system command cat /sys/kernel/debug/ion/heaps/ion_cma | grep -w 1531 | grep -w sample_hbmem.
         ion_cma     sample_hbmem             1531          1384448
    sample_hbmem             1531            other           921600 0
    sample_hbmem             1531            other           462848 0
[1531:1531] Result 0.
free import buf
[1531:1531] Do system command cat /sys/kernel/debug/ion/clients/1531*.
       heap_name:    size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
-------------------------------------------------------------------------
          total                 0
-------------------------------------------------------------------------
[1531:1531] Do system command cat /sys/kernel/debug/ion/heaps/ion_cma | grep -w 1531 | grep -w sample_hbmem.
[1531:1531] Result 256.
sample_share_graph_buffer done
=================================================

• 进程间 Graphic Buffer 共享

# ./sample_hbmem -m 9
sample_mode = 9
=================================================
Ready to sample_share_graph_buffer_fork_process_scenario
alloc graph buf form ion_cma
socketpair: 0
[1571:902] In parent process.
[1572:1571] In child process.
parent write share buf: parent test graph buf share.
share_consume_cnt: 0
[1571:902] parent send msg 1
[1572:1571] child recv msg 1
child read share buf: parent test graph buf share.
share_consume_cnt: 1
child write share buf: child test common buf share.
[1572:1571] child send msg 2
[1571:902] parent recv msg 2
parent read share buf: child test common buf share.
[1571:902] parent send msg 3
[1572:1571] child recv msg 3
share_consume_cnt: 0
[1571:902] parent quit
[1572:1571] child quit
alloc graph buf form carveout
socketpair: 0
[1571:902] In parent process.
[1573:1571] In child process.
parent write share buf: parent test graph buf share.
share_consume_cnt: 0
[1571:902] parent send msg 1
[1573:1571] child recv msg 1
child read share buf: parent test graph buf share.
share_consume_cnt: 1
child write share buf: child test common buf share.
[1573:1571] child send msg 2
[1571:902] parent recv msg 2
parent read share buf: child test common buf share.
[1571:902] parent send msg 3
[1573:1571] child recv msg 3
share_consume_cnt: 0
[1571:902] parent quit
[1573:1571] child quit
alloc graph buf form cma_reserved
socketpair: 0
[1571:902] In parent process.
[1574:1571] In child process.
parent write share buf: parent test graph buf share.
share_consume_cnt: 0
[1571:902] parent send msg 1
[1574:1571] child recv msg 1
child read share buf: parent test graph buf share.
share_consume_cnt: 1
child write share buf: child test common buf share.
[1574:1571] child send msg 2
[1571:902] parent recv msg 2
parent read share buf: child test common buf share.
[1571:902] parent send msg 3
[1574:1571] child recv msg 3
share_consume_cnt: 0
[1571:902] parent quit
[1574:1571] child quit
sample_share_graph_buffer_fork_process_scenario done
=================================================

• 进程间 Share Pool 共享

# ./sample_hbmem -m 10
sample_mode = 10
=================================================
Ready to sample_share_pool_fork_process_scenario
[1576:902] In parent proces[12121.836077] ion_share_pool_monitor_ref_cnt failed -512
s.
[1577:1576] In child process.
[1576:1576] Do system command cat /sys/kernel/debug/ion/clients/1576*.
       heap_name:    [12121.854779] ion_share_pool_monitor_ref_cnt failed -512
size_in_bytes :  handle refcount :    handle import :       buffer ptr :  buffer refcount :  buffer share id : buffer share count
         ion_cma:            20000 :                1 :                1 :         4b5ef9a2 :                3:                7 :                1

         ion_cma:            20000 :                1 :                1 :         baf4062a :                3:                8 :                1

         ion_cma:            20000 :                1 :                1 :         c865393e :                3:                9 :                1

         ion_cma:            20000 :                1 :                1 :         5db7853d :                3:               10 :                1

         ion_cma:            20000 :                1 :                1 :         d973ee69 :                3:               11 :                1

-------------------------------------------------------------------------
          total             a0000
-------------------------------------------------------------------------
[1576:1576] Do system command cat /sys/kernel/debug/ion/heaps/ion_cma | grep -w 1576 | grep -w sample_hbmem.
         ion_cma     sample_hbmem             1576           655360
    sample_hbmem             1576            other           131072 0
    sample_hbmem             1576            other           131072 0
    sample_hbmem             1576            other           131072 0
    sample_hbmem             1576            other           131072 0
    sample_hbmem             1576            other           131072 0
[1576:1576] Result 0.
hb_mem_share_pool_alloc_buf 0 0xffffa12b0000
hb_mem_share_pool_alloc_buf 1 0xffffa12d0000
hb_mem_share_pool_alloc_buf 2 0xffffa12f0000
hb_mem_share_pool_alloc_buf 3 0xffffa1310000
hb_mem_share_pool_alloc_buf 4 0xffffa1330000
[1576:902] parent send msg 1
[1577:1576] child recv msg 1
[1577:1576] child send msg 2
[1576:902] parent recv msg 2
free 0 0xffffa12b0000
[1576:902] parent pool.avail_buf_cnt: 0
free 1 0xffffa12d0000
[1576:902] parent pool.avail_buf_cnt: 1
free 2 0xffffa12f0000
[1576:902] parent pool.avail_buf_cnt: 2
free 3 0xffffa1310000
[1576:902] parent pool.avail_buf_cnt: 3
free 4 0xffffa1330000
[1576:902] parent pool.avail_buf_cnt: 4
[1576:902] parent send msg 3
[1577:1576] child recv msg 3
[1577:1576] child send msg 4
[1576:902] parent recv msg 4
[1576:902] parent pool.avail_buf_cnt: 5
[1577:1576] child quit
[1576:902] parent quit
sample_share_pool_fork_process_scenario done
=================================================

• 使用 Share Pool

# ./sample_hbmem -m 11
sample_mode = 11
=================================================
Ready to sample_share_pool
pool.avail_buf_cnt: 9
pool.avail_buf_cnt: 8
pool.avail_buf_cnt: 7
pool.avail_buf_cnt: 6
pool.avail_buf_cnt: 5
pool.avail_buf_cnt: 4
pool.avail_buf_cnt: 3
pool.avail_buf_cnt: 2
pool.avail_buf_cnt: 1
pool.avail_buf_cnt: 0
pool.avail_buf_cnt: 1
pool.avail_buf_cnt: 2
pool.avail_buf_cnt: 3
pool.avail_buf_cnt: 4
pool.avail_buf_cnt: 5
pool.avail_buf_cnt: 6
pool.avail_buf_cnt: 7
pool.avail_buf_cnt: 8
pool.avail_buf_cnt: 9
pool.avail_buf_cnt: 10
sample_share_pool done
=================================================

• 在 Graphic Buffer 与 Common Buffer 之间实现 Buffer 转换

# ./sample_hbmem -m 12
sample_mode = 12
=================================================
Ready to sample_alloc_graph_buf_group_heapmask
----alloc graphic buffer done!----
the data in graphic buffer:
size: 0x1fa400
flags: 0x8000011
fd: 4
share id: 7
virt_addr: 0x0xffffae348000
paddr: 0xe1800000
----change graphic buffer to common buffer done!----
the data in new common buffer:
size: 0x1fa400
flags: 0x8000011
fd: 4
share id: 7
virt_addr: 0x0xffffae348000
paddr: 0xe1800000
----alloc common buffer done!----
the data in common buffer:
size: 0x10000
flags: 0x8000011
fd: 5
share id: 8
virt_addr: 0x0xffffaeb10000
paddr: 0xe1af8000
----change common buffer to graphic buffer done!----
the data in new graphic buffer:
size: 0x10000
flags: 0x8000011
fd: 5
share id: 8
virt_addr: 0x0xffffaeb10000
paddr: 0xe1af8000
sample_alloc_graph_buf_group_heapmask done
=================================================