Label: Data sp c time r BS as informationThe arrangement of data stored on the disk affects the total time of the I/O service.Assume that each track is divided into 10 physical blocks, each of which stores one logical record. Logical record R! Logical records. The logical records R1, R2, Zookeeper, and R10 are stored on the same track. The order of the records is shown in the following table:Physical Block 1 2 3 4 5 6 7 8 9 10Logical record R1 R2 R3 R4 R5 R6
The tiny6410 Development Board supports both NAND and SD startup modes.
In my understanding, it means "nc" is not connected. Om [] = 01111, boot_eint [] = 000, refer to the following table to indicate that the SD card is enabled. The switch is not described in the schematic.
The LED diagram is as follows:
Gpk4, 5, 6, and 7 light-emitting diodes are switched ON when the light-emitting diode is switched on.
Arm Assembly
MoV command
1: Syntax:
2:
3:
filled with the default value.
2.1 OK, Let's see insert into... on duplicate key update,
mysql> insert into t1(a,b) select '3','r5' on duplicate key update b='r5';Query OK, 2 rows affected, 1 warning (0.19 sec)Records: 1 Duplicates: 1 Warnings: 1mysql> select * from t1;+---+----+----+| a | b | c |+---+----+----+| 1 | c3 | c2 || 2 | a | || 3 | r5 | r3 || 5 | r4 | r5 |+---+----+----+4 rows in set (0.00 sec)
[] When a = 5, the original C value is still there, which means that when the ke
) create a cache required for the C program to run and allocate 64 K stack space.
(8) R2 indicates the cache end address, R4 indicates the last execution address of the kernel, and R5 indicates the start address of the kernel object. Check whether the address conflict exists.
Set R5 to R2 so that the kernel address after decompress is after the 64 K stack.
(9) Call the decompress_kernel () function of the file Misc. C, decompress the kernel at the end of the cache (after the R2 address ). The re
the vsid, R4 stores the virtual address, R5 stores the Linux page table entry, and R6 stores the Linux PTE before _ page_hashpte, r7 saves the offset to the address (0 when MMU is enabled and-kernelbase: 0xc0000000 when off ).
Let's take a look at several hash_page_patches, which involve two functions in hash_low_32.s. create_hpte is relatively simple. The function is to create hpte. In the assembly code, it is to fill R5, as shown below:
_ Global (c
understand it? Paste the code first and then ask Google if you don't understand it.
/* autogenerated by gensyscalls.py */#include
What is _ nr_nanosleep, intuition, certainly defined in sys/linux-syscalls.h. Open/libc/include/sys/linux-syscalls.h and search _ nr_nanosleep, understand, it defines the value of _ nr_nanosleep (_ nr_syscall_base + 162 ), actually, the system call number is defined. This is connected to the previous article SWI. The above code passes the system call number to
]! ; Push parameter E into the stack
BL subr; 2) Call the subroutine subr
Add SP, SP, #8; 8) balance the stack. Subr is returned here, and the returned value is saved in R0.
Subr
Stmfd SP !, {R4-R7, FP, LR}; 3) Save the working register, FP, and LR
Add FP, SP, #16; 4) Calculate the frame pointer
Sub sp, SP, #8; 5) Allocate space for local variables
LDR R4, [FP, #8]; loading parameter E
LDR R5, [FP, #12]; load parameter F
... ; Subr subroutine body
Ad
address in R14. All R14 instances must be saved to other registers (not actually valid) or a stack. This register has a shadow Register in each processor mode. Once the connection address has been saved, this register can be used as a general register.Register 15 is the program counter. In addition to holding the 26-digit number of the address currently used by the instruction program, it also holds the status of the processor.Provide the following charts for clarity:
User Mode SVC mode IRQ mod
Telnet:Hold session: ctrl + shift + 6, Press x,Then, you can display the session you initiated on your device: show session.If you want to return your own session: You can quickly double-click and press enter, or you can use resume 1
View the sessions initiated by R5.R5 # show sessionConn Host Address Byte Idle Conn Name* 1 192.168.1.1 192.168.1.1 0 0 192.168.1.1R5 #[Resuming connection 1 to 192.168.1.1...]R7 #R5 # remR5 # resume 1[Resuming connectio
have shown you the whole process, my sweat is down, I want to strike, but in the end we still look at all the log information, through log can find all the things we do:R1-R7 is exactly what I was doing, from the message you can find out what I've done with trunks and branch, and in the lower left corner of the Log Messages window, you can see the additional merge by checking "Include merged revisions". Information:The gray is the log associated with
repeat the 6-10 steps.11. Merge branch back to TrunkRight-click on the/trunk/myproject (note Right-click on the main Line's directory), select "TortoiseSVN", then "Merge ...", and in the popup window, merge type Select the second item "reintegrate a branch" , this type of merge is suitable for merging all changes back to the mainline after the branch development is complete.After clicking Next, the following window appears:Here, the from URL selects/branches/myproject without selecting the revi
branchHere I have shown you the whole process, my sweat is down, I want to strike, but in the end we still look at all the log information, through log can find all the things we do:R1-R7 is exactly what I was doing, from the message you can find out what I've done with trunks and branch, and in the lower left corner of the Log Messages window, you can see the additional merge by checking "Include merged revisions". Information:The gray is the log as
'3','r5' on duplicate key update b='r5'; Query OK, 2 rows affected, 1 warning (0.19 sec) Records: 1 Duplicates: 1 Warnings: 1 mysql> select * from t1; +---+----+----+ | a | b | c | +---+----+----+ | 1 | c3 | c2 | | 2 | a | | | 3 | r5 | r3 | | 5 | r4 | r5 | +---+----+----+ 4 rows in set (0.00 sec)
[] When a = 5, the original c value is still there, which means that when the key is sometimes, only the following udate operation statement is executed.
2.2 check the auto_increment status again.
mysq
;
+ --- + ---- +
| A | B | c |
+ --- + ---- +
| 1 | c3 | c2 |
| 2 | a |
| 3 | r5 | r3 |
| 5 | r4 | r5 |
+ --- + ---- +
4 rows in set (0.00 sec)
[] When a = 5, the original c value is still there, which means that when the key is sometimes, only the following udate operation statement is executed.
2.2 check the auto_increment status again.
Mysql> insert into t1 (a, B) select '3', 'r5 'on duplicate key update B = 'r5 ';
Query OK, 2 rows affected, 1 warning (0.19 sec)
Records: 1 Duplicates: 1 War
, die for something $", RegexOptions. Multiline );Console. WriteLine ("r2 match count:" + r2.Matches (I). Count); // 0Regex r3 = new Regex ("^ Live for nothing, \ r \ ndie for something $ ");Console. WriteLine ("r3 match count:" + r3.Matches (I). Count); // 1Regex r4 = new Regex ("^ Live for nothing, $ ");Console. WriteLine ("r4 match count:" + r4.Matches (I). Count); // 0Regex r5 = new Regex ("^ Live for nothing, $", RegexOptions. Multiline );Console. WriteLine ("r5 match count:" + r5.Matches (
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r2 = new Regex ("^live for Nothing,die for something$", regexoptions.multiline);
Console.WriteLine ("R2 Match count:" + R2.) Matches (i). Count);//0
Regex r3 = new Regex ("^live for Nothing,\r\ndie for something$");
Console.WriteLine ("R3 Match count:" + R3.) Matches (i). Count);//1
Regex r4 = new Regex ("^live for nothing,$");
Console.WriteLine ("R4 match count:" + R4.) Matches (i). Count);//0
Regex R5 = new Regex ("^live for nothing,$", regexoptions.multiline);
Console.WriteLine ("R5 M
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