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Sheaves 将在 Linux 7.0 中发挥更大作用

  • 2026-02-27 03:47:59
Sheaves 将在 Linux 7.0 中发挥更大作用

Sheaves 将在 Linux 7.0 中发挥更大作用 🚀

Slab 内存分配器是 Linux 内核中用于管理小块内存对象的核心机制。slab 内存分配器功能更新已合并到 Linux 7.0 内核中，最值得注意的是，最近引入的 Sheaves 功能的使用范围得到了扩展。
🔹 Sheaves 已合并回 Linux 6.19 版本，它最初是一个可选的、基于每 CPU 数组的缓存层，有可能进一步提升 Linux 的性能。
🔹 如今在 Linux 7.0 版本中， Sheaves 功能正扮演着更为重要的角色。
🔹 Sheaves 正在替换 Linux 内核中更多的缓存代码，希望这一新实现能进一步提升性能。
🔹 将其应用于所有缓存，并移除了之前的 CPU（部分）slab 缓存机制。除了能降低锁开销，且在释放时更有可能走快速路径外，这还移除了与 CPU slab 无锁快速路径相关的相当复杂的代码，以及其在 PREEMPT_RT 或 kmalloc_nolock() 方面的所有复杂问题。
🔹对于远程 NUMA 对象的释放，在大多数情况下无需节点 list_lock 即可将对象从 sheaves 刷新到 slabs。
🔹 合并 slab 代码还尽可能消除了 slabobj_ext 元数据开销，通过重用 slab 中的剩余空间或每个对象的填充来提高效率。
💭 本次 Linux 7.0 对 Sheaves 架构的大规模应用为内核性能的进一步跃升打下了基础。
#内存管理 #Linux内核 #Linux

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      136. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-template/src/Template.php ( 46.61 KB )
      137. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-template/src/template/driver/File.php ( 2.41 KB )
      138. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-template/src/template/contract/DriverInterface.php ( 0.86 KB )
      139. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/runtime/temp/067d451b9a0c665040f3f1bdd3293d68.php ( 11.98 KB )
      140. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
      1. CONNECT:[ UseTime:0.000371s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
      2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000514s ]
      3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000247s ]
      4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000269s ]
      5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000463s ]
      6. SELECT * FROM `set` [ RunTime:0.000187s ]
      7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000543s ]
      8. SELECT * FROM `article` WHERE `id` = 476106 LIMIT 1 [ RunTime:0.000370s ]
      9. UPDATE `article` SET `lasttime` = 1772285752 WHERE `id` = 476106 [ RunTime:0.000570s ]
      10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.000209s ]
      11. SELECT * FROM `article` WHERE `id` < 476106 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000425s ]
      12. SELECT * FROM `article` WHERE `id` > 476106 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000342s ]
      13. SELECT * FROM `article` WHERE `id` < 476106 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000970s ]
      14. SELECT * FROM `article` WHERE `id` < 476106 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000763s ]
      15. SELECT * FROM `article` WHERE `id` < 476106 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000585s ]
      0.071273s