最近在用C语言写了几个算法
评估了下 函数的时间
出现了
XMD% profile -config sampling_freq_hz 10000 binsize 4 profile_mem 0x90000000XMD% dow executable.elfDownloading Program -- executable.elf section, .vectors.reset: 0x00000000-0x00000003 section, .vectors.sw_exception: 0x00000008-0x0000000b section, .vectors.interrupt: 0x00000010-0x00000013 section, .vectors.hw_exception: 0x00000020-0x00000023 section, .text: 0x00000050-0x00000b83 section, .init: 0x00000b84-0x00000ba7 section, .fini: 0x00000ba8-0x00000bc3 section, .rodata: 0x00000bc4-0x00000bf9 &nb00000bfa-0x00000bff section, .data: 0x00000c00-0x00000d2f section, .ctors: 0x00000d30-0x00000d37 section, .dtors: 0x00000d38-0x00000d3f section, .eh_frame: 0x00000d40-0x00000d43 section, .jcr: 0x00000d44-0x00000d47 section, .bss: 0x00000d48-0x00000d6f section, .heap: 0x00000d70-0x0000156f section, .stack: 0x00001570-0x0000256f_gmonparam start addr: 0x90000000Setting PC with Program Start Address 0x00000000System Reset .... DONEProgram executable.elf being Profiled on HardwareInitialized Profile Configurations for the Program :---------------------------------------------------Sampling Frequency...............10000 HzHistogram Bin Size...............4 WordsMemory for Profiling used from...0x90000000Memory Used for Profiling Data...2008 Bytes
XMD% bps exir ERROR: Function "exir" not found in Elf file "executable.elf"
Symbol Not Found in Elf File Symbol exir in Elf executable.elf
XMD% bps exitSetting breakpoint at 0x00000890
XMD% conProcessor started. Type "stop" to stop processor
RUNNING> XMD% Software Breakpoint 0 Hit, Processor Stopped at 0x00000890
XMD% profile ERROR: Invalid Profile data on Target Unable to generate gproff file
后来问题解决了
Flat profile:
Each sample counts as 0.0001 seconds. % cumulative self self total time seconds seconds calls ms/call ms/call name 61.29 0.01 0.01 45 0.30 0.30 XUartLite_SendByte 15.67 0.02 0.00 __ieee754_sqrt 11.18 0.02 0.00 __floatsidf 2.76 0.02 0.00 600 0.00 0.00 square 2.07 0.02 0.00 __unpack_d 1.38 0.02 0.00 sqrt 1.27 0.02 0.00 __gedf2 0.92 0.02 0.00 1 0.20 0.80 calc_hypotenuse 0.92 0.02 0.00 1 0.20 1.00 main 0.92 0.02 0.00 __fpcmp_parts_d 0.46 0.02 0.00 __fixdfsi 0.35 0.02 0.00 microblaze_disable_dcache 0.35 0.02 0.00 microblaze_enable_dcache 0.23 0.02 0.00 __pack_d 0.12 0.02 0.00 microblaze_disable_icache 0.12 0.02 0.00 microblaze_enable_icache
% the percentage of the total running time of thetime program used by this function.
cumulative a running sum of the number of seconds accounted seconds for by this function and those listed above it.
self the number of seconds accounted for by thisseconds function alone. This is the major sort for this listing.
calls the number of times this function was invoked, if this function is profiled, else blank. self the average number of milliseconds spent in thisms/call function per call, if this function is profiled, else blank.
total the average number of milliseconds spent in thisms/call function and its descendents per call, if this function is profiled, else blank.
name the name of the function. This is the minor sort for this listing. The index shows the location of the function in the gprof listing. If the index is in parenthesis it shows where it would appear in the gprof listing if it were to be printed. Call graph (explanation follows)
granularity: each sample hit covers 16 byte(s) for 0.46% of 0.02 seconds
index % time self children called name 0.01 0.00 45/45 outbyte [2][1] 61.3 0.01 0.00 45 XUartLite_SendByte [1]----------------------------------------------- <spontaneous>[2] 61.3 0.00 0.01 outbyte [2] 0.01 0.00 45/45 XUartLite_SendByte [1]----------------------------------------------- <spontaneous>[3] 15.7 0.00 0.00 __ieee754_sqrt [3]----------------------------------------------- <spontaneous>[4] 11.2 0.00 0.00 __floatsidf [4]----------------------------------------------- 0.00 0.00 1/1 _crtinit [6][5] 4.6 0.00 0.00 1 main [5] 0.00 0.00 1/1 calc_hypotenuse [7]----------------------------------------------- <spontaneous>[6] 4.6 0.00 0.00 _crtinit [6] 0.00 0.00 1/1 main [5]----------------------------------------------- 0.00 0.00 1/1 main [5][7] 3.7 0.00 0.00 1 calc_hypotenuse [7] 0.00 0.00 600/600 square [8]----------------------------------------------- 0.00 0.00 600/600 calc_hypotenuse [7][8] 2.8 0.00 0.00 600 square [8]----------------------------------------------- <spontaneous>[9] 2.1 0.00 0.00 __unpack_d [9]----------------------------------------------- <spontaneous>[10] 1.4 0.00 0.00 sqrt [10]----------------------------------------------- <spontaneous>[11] 1.3 0.00 0.00 __gedf2 [11]----------------------------------------------- <spontaneous>[12] 0.9 0.00 0.00 __fpcmp_parts_d [12]----------------------------------------------- <spontaneous>[13] 0.5 0.00 0.00 __fixdfsi [13]----------------------------------------------- <spontaneous>[14] 0.3 0.00 0.00 microblaze_disable_dcache [14]----------------------------------------------- <spontaneous>[15] 0.3 0.00 0.00 microblaze_enable_dcache [15]----------------------------------------------- <spontaneous>[16] 0.2 0.00 0.00 __pack_d [16]----------------------------------------------- <spontaneous>[17] 0.1 0.00 0.00 microblaze_disable_icache [17]----------------------------------------------- <spontaneous>[18] 0.1 0.00 0.00 microblaze_enable_icache [18]-----------------------------------------------
This table describes the call tree of the program, and was sorted by the total amount of time spent in each function and its children.
Each entry in this table consists of several lines. The line with the index number at the left hand margin lists the current function. The lines above it list the functions that called this function, and the lines below it list the functions this one called. This line lists: index A unique number given to each element of the table. Index numbers are sorted numerically. The index number is printed next to every function name so it is easier to look up where the function in the table.
% time This is the percentage of the `total' time that was spent in this function and its children. Note that due to different viewpoints, functions excluded by options, etc, these numbers will NOT add up to 100%.
self This is the total amount of time spent in this function.
children This is the total amount of time propagated into this function by its children.
called This is the number of times the function was called. If the function called itself recursively, the number only includes non-recursive calls, and is followed by a `+' and the number of recursive calls.
name The name of the current function. The index number is printed after it. If the function is a member of a cycle, the cycle number is printed between the function's name and the index number.
For the function's parents, the fields have the following meanings:
self This is the amount of time that was propagated directly from the function into this parent.
children This is the amount of time that was propagated from the function's children into this parent.
called This is the number of times this parent called the function `/' the total number of times the function was called. Recursive calls to the function are not included in the number after the `/'.
name This is the name of the parent. The parent's index number is printed after it. If the parent is a member of a cycle, the cycle number is printed between the name and the index number.
If the parents of the function cannot be determined, the word `<spontaneous>' is printed in the `name' field, and all the other fields are blank.
For the function's children, the fields have the following meanings:
self This is the amount of time that was propagated directly from the child into the function.
children This is the amount of time that was propagated from the child's children to the function.
called This is the number of times the function called this child `/' the total number of times the child was called. Recursive calls by the child are not listed in the number after the `/'.
name This is the name of the child. The child's index number is printed after it. If the child is a member of a cycle, the cycle number is printed between the name and the index number.
If there are any cycles (circles) in the call graph, there is an entry for the cycle-as-a-whole. This entry shows who called the cycle (as parents) and the members of the cycle (as children.) The `+' recursive calls entry shows the number of function calls that were internal to the cycle, and the calls entry for each member shows, for that member, how many times it was called from other members of the cycle.
Index by function name
[1] XUartLite_SendByte [16] __pack_d [15] microblaze_enable_dcache [13] __fixdfsi [9] __unpack_d [18] microblaze_enable_icache [4] __floatsidf [7] calc_hypotenuse [10] sqrt [12] __fpcmp_parts_d [5] main [8] square [11] __gedf2 [14] microblaze_disable_dcache [3] __ieee754_sqrt [17] microblaze_disable_icache
生成的报告如上
O(∩_∩)O~
转载于:https://www.cnblogs.com/ifpga/archive/2011/11/16/2250498.html
相关资源：EDK官方实验，Microblaze实验，自定制IP实验。