struct lock_sys_t{LockMutex mutex;hash_table_t* rec_hash;hash_table_t* prdt_hash;hash_table_t* prdt_page_hash;LockMutex wait_mutex;srv_slot_t* waiting_threads;srv_slot_t* last_slot;int n_waiting;}; struct lock_t {trx_t* trx;UT_LIST_NODE_T(lock_t) trx_locks;dict_index_t*...
struct lock_sys_t{LockMutex mutex;hash_table_t*rec_hash;hash_table_t*prdt_hash;hash_table_t*prdt_page_hash;LockMutex wait_mutex;srv_slot_t*waiting_threads;srv_slot_t*last_slot;int n_waiting;};struct lock_t{trx_t*trx;UT_LIST_NODE_T(lock_t)trx_locks;dict_index_t*index;lock_t*h...
WL#10314: InnoDB: Lock-sys optimization: sharded lock_sys mutex Affects: Server-8.0 —Status: Complete Description Requirements Dependent Tasks High Level Architecture Low Level Design The Lock-sys orchestrates access to tables and rows. Each table, and each row, can be thought of as a resource...
mutex_lock(&clocksource_mutex); ret = sysfs_get_uname(buf, override_name, count); if (ret >= 0) clocksource_select(); mutex_unlock(&clocksource_mutex); return ret; } /** * sysfs_unbind_current_clocksource - interface for manually unbinding clocksource * @dev: unused * @attr: unused ...
加锁的方式:1、同步实例方法,锁是当前实例对象2、同步类方法,锁是当前类对象3、同步代码块,锁是括号里面的对象synchronized底层原理synchronized是基于JVM内置锁实现,通过内部对象Monitor(监视器锁)实现,基于进入与退出Monitor对象实现方法与代码块同步,监视器锁的实现依赖底层操作系统的Mutexlock(互斥锁)实现,它是一个...
这里看到TRX_SYS mutex并不是长时间的等待(0秒),而是很短但是可见。 1.2 pstack(pt-pmp格式化) 其中一个pstack展示如下,这里我删除了大部分内容,只留下有价值的部分。 image.png 1.3 火焰图 image.png 二、初步分析 很显然从上面的信息可以看出来,purge线程在获取最老的一个read view 用于清理undo和delete fla...
'sys_mutex_lock' failed with 0x80010008 : CELL_EDEADLK [1] E {PPU[0x1000018] Thread (_sys_MixerChStripMain) [0x013054ec]} '_sys_lwmutex_lock' failed with 0x80010005 : CELL_ESRCH [1] E {PPU[0x1000018] Thread (_sys_MixerChStripMain) [0x013054ec]} '_sys_lwmutex_lock' fail...
lock:锁实现名称 "semaphore":使用信号的锁 "mutex_cond":使用互斥和条件变量的锁 None:锁信息未知 version:线程库的名称和版本。如果为None表示信息未知 sys.tracebacklimit 发生未处理的异常时,打印的回溯信息的最大层级。默认为1000。当设置为0或负数时,所有的回溯信息受到打印抑制,而只打印type和value ...
*/if((cmd==LINUX_REBOOT_CMD_POWER_OFF)&&!pm_power_off)cmd=LINUX_REBOOT_CMD_HALT;mutex_lock(&reboot_mutex);switch(cmd){caseLINUX_REBOOT_CMD_RESTART:kernel_restart(NULL);break;caseLINUX_REBOOT_CMD_CAD_ON:C_A_D=1;break;caseLINUX_REBOOT_CMD_CAD_OFF:C_A_D=0;break;caseLINUX_REBOOT_CMD...
Bug #76728reduce lock_sys->mutex contention for transaction that only contains SELECT Submitted:17 Apr 2015 4:48Modified:3 Jun 2016 19:58 Reporter:zhai weixiang(OCA)Email Updates: Status:ClosedImpact on me: None Category:MySQL Server: InnoDB storage engineSeverity:S3 (Non-critical) ...