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annotate src/testdir/test_memory_usage.vim @ 16107:b951bea7d11e v8.1.1058

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patch 8.1.1058: memory usage test may still fail on some systems commit https://github.com/vim/vim/commit/3a731ee0c2dd34792c1b21fc4c699a84129f1b86 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Mar 27 21:41:36 2019 +0100 patch 8.1.1058: memory usage test may still fail on some systems Problem: Memory usage test may still fail on some systems. Solution: Use 98% of the lower limit. (Christian Brabandt)
author Bram Moolenaar <Bram@vim.org>
date Wed, 27 Mar 2019 21:45:05 +0100
parents e4ba2925b54d
children 0baa4c7e057f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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16003
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1 " Tests for memory usage.
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2
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3 if !has('terminal') || has('gui_running') || $ASAN_OPTIONS !=# ''
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4 " Skip tests on Travis CI ASAN build because it's difficult to estimate
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5 " memory usage.
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6 finish
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7 endif
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8
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9 source shared.vim
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10
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11 func s:pick_nr(str) abort
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12 return substitute(a:str, '[^0-9]', '', 'g') * 1
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13 endfunc
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14
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15 if has('win32')
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16 if !executable('wmic')
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17 finish
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18 endif
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19 func s:memory_usage(pid) abort
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20 let cmd = printf('wmic process where processid=%d get WorkingSetSize', a:pid)
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21 return s:pick_nr(system(cmd)) / 1024
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22 endfunc
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23 elseif has('unix')
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24 if !executable('ps')
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25 finish
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26 endif
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27 func s:memory_usage(pid) abort
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28 return s:pick_nr(system('ps -o rss= -p ' . a:pid))
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29 endfunc
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30 else
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31 finish
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32 endif
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33
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34 " Wait for memory usage to level off.
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35 func s:monitor_memory_usage(pid) abort
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36 let proc = {}
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37 let proc.pid = a:pid
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38 let proc.hist = []
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39 let proc.max = 0
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40
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41 func proc.op() abort
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42 " Check the last 200ms.
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43 let val = s:memory_usage(self.pid)
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44 if self.max < val
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45 let self.max = val
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46 endif
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47 call add(self.hist, val)
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48 if len(self.hist) < 20
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49 return 0
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50 endif
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51 let sample = remove(self.hist, 0)
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52 return len(uniq([sample] + self.hist)) == 1
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53 endfunc
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54
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55 call WaitFor({-> proc.op()}, 10000)
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56 return {'last': get(proc.hist, -1), 'max': proc.max}
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57 endfunc
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58
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59 let s:term_vim = {}
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60
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61 func s:term_vim.start(...) abort
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62 let self.buf = term_start([GetVimProg()] + a:000)
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63 let self.job = term_getjob(self.buf)
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64 call WaitFor({-> job_status(self.job) ==# 'run'})
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65 let self.pid = job_info(self.job).process
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66 endfunc
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67
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68 func s:term_vim.stop() abort
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69 call term_sendkeys(self.buf, ":qall!\<CR>")
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70 call WaitFor({-> job_status(self.job) ==# 'dead'})
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71 exe self.buf . 'bwipe!'
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72 endfunc
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73
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74 func s:vim_new() abort
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75 return copy(s:term_vim)
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76 endfunc
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77
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78 func Test_memory_func_capture_vargs()
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79 " Case: if a local variable captures a:000, funccall object will be free
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80 " just after it finishes.
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81 let testfile = 'Xtest.vim'
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82 call writefile([
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83 \ 'func s:f(...)',
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84 \ ' let x = a:000',
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85 \ 'endfunc',
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86 \ 'for _ in range(10000)',
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87 \ ' call s:f(0)',
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88 \ 'endfor',
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89 \ ], testfile)
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90
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91 let vim = s:vim_new()
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92 call vim.start('--clean', '-c', 'set noswapfile', testfile)
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93 let before = s:monitor_memory_usage(vim.pid).last
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94
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95 call term_sendkeys(vim.buf, ":so %\<CR>")
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96 call WaitFor({-> term_getcursor(vim.buf)[0] == 1})
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97 let after = s:monitor_memory_usage(vim.pid)
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98
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99 " Estimate the limit of max usage as 2x initial usage.
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100 " The lower limit can fluctuate a bit, use 98%.
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101 call assert_inrange(before * 98 / 100, 2 * before, after.max)
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102
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103 " In this case, garbage collecting is not needed.
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104 " The value might fluctuate a bit, allow for 3% tolerance.
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105 let lower = after.last * 97 / 100
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106 let upper = after.last * 103 / 100
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107 call assert_inrange(lower, upper, after.max)
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108
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109 call vim.stop()
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110 call delete(testfile)
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111 endfunc
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112
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113 func Test_memory_func_capture_lvars()
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114 " Case: if a local variable captures l: dict, funccall object will not be
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115 " free until garbage collector runs, but after that memory usage doesn't
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116 " increase so much even when rerun Xtest.vim since system memory caches.
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117 let testfile = 'Xtest.vim'
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118 call writefile([
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119 \ 'func s:f()',
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120 \ ' let x = l:',
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121 \ 'endfunc',
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122 \ 'for _ in range(10000)',
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123 \ ' call s:f()',
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124 \ 'endfor',
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125 \ ], testfile)
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126
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127 let vim = s:vim_new()
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128 call vim.start('--clean', '-c', 'set noswapfile', testfile)
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129 let before = s:monitor_memory_usage(vim.pid).last
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130
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131 call term_sendkeys(vim.buf, ":so %\<CR>")
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132 call WaitFor({-> term_getcursor(vim.buf)[0] == 1})
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133 let after = s:monitor_memory_usage(vim.pid)
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134
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135 " Rerun Xtest.vim.
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136 for _ in range(3)
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137 call term_sendkeys(vim.buf, ":so %\<CR>")
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138 call WaitFor({-> term_getcursor(vim.buf)[0] == 1})
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139 let last = s:monitor_memory_usage(vim.pid).last
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140 endfor
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141
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142 " The usage may be a bit less than the last value, use 80%.
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143 " Allow for 20% tolerance at the upper limit. That's very permissive, but
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144 " otherwise the test fails sometimes.
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145 let lower = before * 8 / 10
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146 let upper = (after.max + (after.last - before)) * 12 / 10
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147 call assert_inrange(lower, upper, last)
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148
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149 call vim.stop()
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150 call delete(testfile)
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151 endfunc