393# Profiling. 394 395list(APPEND CMAKE_BUILD_CONFIGURATIONS Profile) 396if(COMPILER_GCC_OR_CLANG) 397 set(CMAKE_C_FLAGS_PROFILE "-pg" 398 CACHE STRING "profiling flags") 399 set(CMAKE_CXX_FLAGS_PROFILE "${CMAKE_C_FLAGS_PROFILE}" 400 CACHE STRING "profiling flags") 401 set(CMAKE_EXE_LINKER_FLAGS_PROFILE "-pg" 402 CACHE STRING "profiling flags") 403 set(CMAKE_SHARED_LINKER_FLAGS_PROFILE "-pg" 404 CACHE STRING "profiling flags") 405 mark_as_advanced( 406 CMAKE_C_FLAGS_PROFILE 407 CMAKE_CXX_FLAGS_PROFILE 408 CMAKE_EXE_LINKER_FLAGS_PROFILE 409 CMAKE_SHARED_LINKER_FLAGS_PROFILE 410 ) 411endif(COMPILER_GCC_OR_CLANG)

1Flat profile: 2 3Each sample counts as 0.01 seconds. 4 no time accumulated 5 6 % cumulative self self total 7 time seconds seconds calls Ts/call Ts/call name 8 0.00 0.00 0.00 26797 0.00 0.00 log_printf 9 10 % the percentage of the total running time of the 11time program used by this function. 12 13cumulative a running sum of the number of seconds accounted 14 seconds for by this function and those listed above it. 15 16 self the number of seconds accounted for by this 17seconds function alone. This is the major sort for this 18 listing. 19 20calls the number of times this function was invoked, if 21 this function is profiled, else blank. 22 23 self the average number of milliseconds spent in this 24ms/call function per call, if this function is profiled, 25 else blank. 26 27 total the average number of milliseconds spent in this 28ms/call function and its descendents per call, if this 29 function is profiled, else blank. 30 31name the name of the function. This is the minor sort 32 for this listing. The index shows the location of 33 the function in the gprof listing. If the index is 34 in parenthesis it shows where it would appear in 35 the gprof listing if it were to be printed. 36 37 Call graph (explanation follows) 38 39 40granularity: each sample hit covers 4 byte(s) no time propagated 41 42index % time self children called name 43 0.00 0.00 279/26797 animate_square [140] 44 0.00 0.00 2109/26797 gen_square [154] 45 0.00 0.00 24409/26797 thread_func [177] 46[2] 0.0 0.00 0.00 26797 log_printf [2] 47----------------------------------------------- 48 49 This table describes the call tree of the program, and was sorted by 50 the total amount of time spent in each function and its children. 51 52 Each entry in this table consists of several lines. The line with the 53 index number at the left hand margin lists the current function. 54 The lines above it list the functions that called this function, 55 and the lines below it list the functions this one called. 56 This line lists: 57 index A unique number given to each element of the table. 58 Index numbers are sorted numerically. 59 The index number is printed next to every function name so 60 it is easier to look up where the function in the table. 61 62 % time This is the percentage of the `total' time that was spent 63 in this function and its children. Note that due to 64 different viewpoints, functions excluded by options, etc, 65 these numbers will NOT add up to 100%. 66 67 self This is the total amount of time spent in this function. 68 69 children This is the total amount of time propagated into this 70 function by its children. 71 72 called This is the number of times the function was called. 73 If the function called itself recursively, the number 74 only includes non-recursive calls, and is followed by 75 a `+' and the number of recursive calls. 76 77 name The name of the current function. The index number is 78 printed after it. If the function is a member of a 79 cycle, the cycle number is printed between the 80 function's name and the index number. 81 82 83 For the function's parents, the fields have the following meanings: 84 85 self This is the amount of time that was propagated directly 86 from the function into this parent. 87 88 children This is the amount of time that was propagated from 89 the function's children into this parent. 90 91 called This is the number of times this parent called the 92 function `/' the total number of times the function 93 was called. Recursive calls to the function are not 94 included in the number after the `/'. 95 96 name This is the name of the parent. The parent's index 97 number is printed after it. If the parent is a 98 member of a cycle, the cycle number is printed between 99 the name and the index number. 100 101 If the parents of the function cannot be determined, the word 102 `<spontaneous>' is printed in the `name' field, and all the other 103 fields are blank. 104 105 For the function's children, the fields have the following meanings: 106 107 self This is the amount of time that was propagated directly 108 from the child into the function. 109 110 children This is the amount of time that was propagated from the 111 child's children to the function. 112 113 called This is the number of times the function called 114 this child `/' the total number of times the child 115 was called. Recursive calls by the child are not 116 listed in the number after the `/'. 117 118 name This is the name of the child. The child's index 119 number is printed after it. If the child is a 120 member of a cycle, the cycle number is printed 121 between the name and the index number. 122 123 If there are any cycles (circles) in the call graph, there is an 124 entry for the cycle-as-a-whole. This entry shows who called the 125 cycle (as parents) and the members of the cycle (as children.) 126 The `+' recursive calls entry shows the number of function calls that 127 were internal to the cycle, and the calls entry for each member shows, 128 for that member, how many times it was called from other members of 129 the cycle. 130 131Index by function name 132 133 [2] log_printf