xfp lr

1. The LoadRunner hinderedPerformance TestingPeople's understanding of the communication processI hope that the person who does the performance test can forget the tool. We all know that Vugen has a recording function, in fact, recording this function is a very bad choice for testing, is to follow the scene implementation brings a lot of uncertainty. Because some people do not understand the script, or do not know what the meaning of the script, resulting in some performance problems, helpless.

exception occurs and an response is received:Copy CPSR to spsr _ Set the appropriate CPSR bit:Change processor status to arm statusChange the processor mode to the corresponding exception ModeSet the interrupt prohibition bit to disable the corresponding interruptUpdate LR _ Set the PC to the corresponding exception VectorAt the same time, the processor automatically enters the arm status regardless of whether the exception occurs in arm or thumb. An

mode 2 0x14 Reserved 0x18 external interrupt request (IRQ) external interrupt mode (IRQ) 4 0x1c fast interrupt request (FIQ) Fast interrupt mode (FIQ) 3 Except FIQ, only R13 and R14 special registers are available. Rn must be used to define these registers. R13_svc rn R13 9.2 abnormal interrupt response process 9.2.1 arm response to abnormal interruptions 1. Save the current status of the processor, the interrupt shielding bit, and the flag of each condition. 2. Set the corresponding bits in

Several situations returned by arm exception interruptionsImportant basic knowledge: R15 (PC) always points to the instruction that is taking the finger, instead of the instruction that is executing or decoding. In general, it is customary to refer to the first instruction as a reference point, so PC always points to the third instruction. When the arm status is set, each command is 4 bytes long, so the PC always points to the command address plus an 8-byte address, that is, the PC value = the c

whose purpose is to recover HR from the LR image. The typical way to build HR today is to learn a lr-hr mapping, which is implemented by a deep network. These networks compute a series of SR feature graphs, with one or more upper sampling layers at the end to increase resolution and ultimately build HR images. Compared with the simple Feedforward method, human vision uses a feedback link to guide certain t

BL INIT_IRQ @ Call interrupt initialization function in init.c m SR cpsr_c, #0x5f @ set i-bit=0, open IRQ Interrupt Ldr LR, =halt_loop @ set return address Ldr pc, =main @ call main functionHalt_loop:b halt_loopHANDLEIRQ: SubLR, LR, #4@ Calculate return address Stmdb sp!, {R0-R12,LR} @ Save used register @ Note, at this time s P is the interrupt mo

4.7.4 Constructing LALR parsing TablesWe now introduce our last parser construction method, the LALR (LOOKAHEAD-LR) technique. This method was often used in practice, because the tables obtained by it was considerably smaller than the canonical LR Ta Bles, yet most common syntactic constructs of programming languages can being expressed conveniently by an LALR grammar. The same is almost true to SLR grammar

explain or desc in front of SQL to view the statement executionEXPLAIN SELECT * from table name;Third, paste the report when you write some of the disgusting SQL1. Query the eligible item number according to the query criteriaSELECT DISTINCT (XP. Id) from Xmgl_finance_plan XFP left JOIN xmgl_project xp on xfp.proid = XP. Id WHERE 1=1and xp.procategory in (' ITER973 ') and XP. Id in (0,1,2);2.--The total amount of all budget accounts corresponding to

Let's start with some basic knowledge of arm assembly. (We take ARMV7 as an example, the latest iphone5s on the 64-bit is not discussed) Basic Knowledge Section: First you introduce registers: R0-R3: For the transfer of function parameters and return values R4-R6, R8,r10-r11: There is no special provision, is the general General register R7: Stack frame pointer (frame pointer). Point to the address of the previous saved stack frame (stack frame) and link register (link register,

(b) VECTOR_ADDREXCPTN + Stubs_offsetW (b) Vector_irq + Stubs_offsetW (b) Vector_fiq + Stubs_offset Each section jumps to execute the corresponding code: (1) Taking Vector_und as an example vector_stub und, Und_mode . Long __und_usr @ 0 (usr_26/usr_32)= = "__und_usr==" __und_usr_unknown== asmlinkage void __exception do_undefinstr (struct pt_regs *regs). Long __und_invalid @ 1 (fiq_26/fiq_32). Long __und_invalid @ 2 (irq_26/irq_32). Long __und_svc @ 3 (svc_26/svc_32). Long __und_invalid @ 4. Long

; Copy table CREATE Table table Name 2 as ( SELECT * FROM table name 1 ) C> Query Analyzer: Add explain or desc in front of SQL to see the statement run EXPLAIN SELECT * from table name; Third, paste the report when you write some of the disgusting SQL 1. Search for eligible item numbers based on query criteria SELECT DISTINCT (XP. Id) from Xmgl_finance_plan XFP left JOIN xmgl_project xp on xfp.proid = XP. Id WHERE 1=1 and xp.

IRQ, B is the location independent code, where VECTOR_IRQ calls the VECTOR_STUB macrob Vector_fiq + Stubs_offsetSearch Vector_irq found no search, it is actually called VECTOR_STUB macro generated. This macro is introduced later, see Vector_stub IRQ First, it eventually generates VECTOR_IRQ. Globl __stubs_start//call the start address of the variable defined by the VECTOR_STUB macro__stubs_start:/** Interrupt Dispatcher*/vector_stub IRQ, Irq_mode,4//calling the Vector_stub macro defines the VEC

occur during mutual locks, so you also need to handle the situation of mutual locks. Normally, after saving the relevant registers, the system reads the C6, C5, and C13 registers of CP15. The three registers are the Invalid Address Register (FAR), the invalid status register (FSR), and the process number register (which is not well translated by pcp15), which are then processed based on the specific failure type. In the ARM processor, CP15 has three address types: VA, Pa, and MVA. Va (Virtual A

Some cisco switch modules organize the TwinGig Converter Module of the Catalyst 3750-E Series Switch: www.2cto.com TwinGig SFP converter can convert the 10 thousand M Ethernet X2 interface into two Gigabit Ethernet Small pluggable (SFP) ports. XENPAK uplink modules of Catalyst 3750G series switches: common optical modules of Ethernet switches include SFP, GBIC, XFP, and XENPAK, respectively: www.2cto.com SFP: Small Form-factor Pluggable transceiver, s

The difference between w + and r + is not hard to understand. There is also a ++ Read and write at the same time, you can read and write at the same time, while writing at the same time, while reading and writing at the same time, without flush, can be measured using seek and tell. Fp = open ("a.txt", "a +", 0) print 'open', fp. tell () x = fp. read () print 'open read () ', fp. tell () print xfp. write ("123456 \ n") print 'write 1-6 ', fp. tell ()

table name group by field name 2; O>. the first 10 records SELECT * FROM table name LIMIT; (mysql does not have top syntax, limit is generally used for paging) P>. sort (desc in descending order; asc in ascending order; ascending by default) SELECT * FROM table name order by column name DESC; II. Advanced A>. deduplication, commonly used DISTINCT Select distinct * FROM table name; select distinct (column name) FROM table name; B>. copy a table Create table name 2 AS (SELECT * from table

0 common terms for performance testing. boobooke.com/v/bbk1577 1 LR Catalog analysis. boobooke.com/v/bbk1574 2.1 LR interface analysis. boobooke.com/v/bbk1735 2.2 LR interface analysis. boobooke.com/v/bbk1736 2.3 LR interface analysis. boobooke.com/v/bbk1737 3 LR common term

code to the beginning of the probe function:int *ptest = NULL;*ptest = 0x1234;Re-compile the kernel, and it will error after startup and print out the following Oops information:Unable to handle kernel NULL pointer dereference in virtual Address 00000000PGD = c0004000[00000000] *pgd=00000000Internal error:oops:805 [#1]Modules Linked In:cpu:0Not tainted (2.6.22.6 #36)PC is at s3c2410fb_probe+0x18/0x560LR is at platform_drv_probe+0x20/0x24PC: [LR: [psr

4.7.5 efficient construction of LALR parsing TablesThere is several modifications we can make to algorithm 4.59 to avoid constructing the full collection of sets of LR (1) I TEMs in the process of creating an LALR (1) parsing table. First, we can represent any set of LR (0) or LR (1) Items I by it kernel, that's, by those items, which is either the Initi

Program Structure optimization1. Put different functions into different files2. Normally do not use the MMU in bootloader, so switch off the MMUKeystroke initialization1. Open the schematic of the Development Board and locate the key2. Configure the corresponding Gpio to interrupt to initialize the interrupt sourceInitializing the interrupt Controller1.SUBMASK and mask must ensure that there is no blocking interrupt, Gpio is not a sub-interrupt, so do not set Submask,mode and priority to save th