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annotate src/testdir/test_memory_usage.vim @ 17437:5f71f12bdb8c

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Added tag v8.1.1716 for changeset e1b5c15f5fee70aaa68aa8286030cf713a403aee
author Bram Moolenaar <Bram@vim.org>
date Fri, 19 Jul 2019 23:30:05 +0200
parents 6990c1160ea5
children 0da9bc55c31a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 " Tests for memory usage.
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2
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3 source check.vim
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4 CheckFeature terminal
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5
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6 if has('gui_running')
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7 throw 'Skipped: does not work in GUI'
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8 endif
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9 if execute('version') =~# '-fsanitize=[a-z,]*\<address\>'
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10 " Skip tests on Travis CI ASAN build because it's difficult to estimate
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11 " memory usage.
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12 throw 'Skipped: does not work with ASAN'
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13 endif
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14
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15 source shared.vim
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16
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17 func s:pick_nr(str) abort
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18 return substitute(a:str, '[^0-9]', '', 'g') * 1
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19 endfunc
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20
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21 if has('win32')
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22 if !executable('wmic')
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23 throw 'Skipped: wmic program missing'
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24 endif
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25 func s:memory_usage(pid) abort
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26 let cmd = printf('wmic process where processid=%d get WorkingSetSize', a:pid)
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27 return s:pick_nr(system(cmd)) / 1024
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28 endfunc
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29 elseif has('unix')
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30 if !executable('ps')
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31 throw 'Skipped: ps program missing'
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32 endif
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33 func s:memory_usage(pid) abort
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34 return s:pick_nr(system('ps -o rss= -p ' . a:pid))
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35 endfunc
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36 else
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37 throw 'Skipped: not win32 or unix'
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38 endif
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39
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40 " Wait for memory usage to level off.
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41 func s:monitor_memory_usage(pid) abort
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42 let proc = {}
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43 let proc.pid = a:pid
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44 let proc.hist = []
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45 let proc.max = 0
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46
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47 func proc.op() abort
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48 " Check the last 200ms.
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49 let val = s:memory_usage(self.pid)
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50 if self.max < val
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51 let self.max = val
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52 endif
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53 call add(self.hist, val)
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54 if len(self.hist) < 20
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55 return 0
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56 endif
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57 let sample = remove(self.hist, 0)
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58 return len(uniq([sample] + self.hist)) == 1
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59 endfunc
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60
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61 call WaitFor({-> proc.op()}, 10000)
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62 return {'last': get(proc.hist, -1), 'max': proc.max}
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63 endfunc
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64
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65 let s:term_vim = {}
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66
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67 func s:term_vim.start(...) abort
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68 let self.buf = term_start([GetVimProg()] + a:000)
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69 let self.job = term_getjob(self.buf)
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70 call WaitFor({-> job_status(self.job) ==# 'run'})
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71 let self.pid = job_info(self.job).process
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72 endfunc
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73
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74 func s:term_vim.stop() abort
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75 call term_sendkeys(self.buf, ":qall!\<CR>")
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76 call WaitFor({-> job_status(self.job) ==# 'dead'})
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77 exe self.buf . 'bwipe!'
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78 endfunc
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79
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80 func s:vim_new() abort
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81 return copy(s:term_vim)
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82 endfunc
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83
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84 func Test_memory_func_capture_vargs()
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85 " Case: if a local variable captures a:000, funccall object will be free
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86 " just after it finishes.
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87 let testfile = 'Xtest.vim'
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88 let lines =<< trim END
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89 func s:f(...)
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90 let x = a:000
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91 endfunc
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92 for _ in range(10000)
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93 call s:f(0)
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94 endfor
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95 END
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96 call writefile(lines, testfile)
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97
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98 let vim = s:vim_new()
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99 call vim.start('--clean', '-c', 'set noswapfile', testfile)
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100 let before = s:monitor_memory_usage(vim.pid).last
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101
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102 call term_sendkeys(vim.buf, ":so %\<CR>")
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103 call WaitFor({-> term_getcursor(vim.buf)[0] == 1})
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104 let after = s:monitor_memory_usage(vim.pid)
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105
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106 " Estimate the limit of max usage as 2x initial usage.
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107 " The lower limit can fluctuate a bit, use 97%.
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108 call assert_inrange(before * 97 / 100, 2 * before, after.max)
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109
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110 " In this case, garbage collecting is not needed.
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111 " The value might fluctuate a bit, allow for 3% tolerance below and 5% above.
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112 " Based on various test runs.
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113 let lower = after.last * 97 / 100
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114 let upper = after.last * 105 / 100
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115 call assert_inrange(lower, upper, after.max)
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116
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117 call vim.stop()
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118 call delete(testfile)
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119 endfunc
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120
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121 func Test_memory_func_capture_lvars()
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122 " Case: if a local variable captures l: dict, funccall object will not be
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123 " free until garbage collector runs, but after that memory usage doesn't
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124 " increase so much even when rerun Xtest.vim since system memory caches.
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125 let testfile = 'Xtest.vim'
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126 let lines =<< trim END
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127 func s:f()
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128 let x = l:
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129 endfunc
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130 for _ in range(10000)
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131 call s:f()
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132 endfor
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133 END
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134 call writefile(lines, testfile)
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135
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136 let vim = s:vim_new()
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137 call vim.start('--clean', '-c', 'set noswapfile', testfile)
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138 let before = s:monitor_memory_usage(vim.pid).last
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139
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140 call term_sendkeys(vim.buf, ":so %\<CR>")
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141 call WaitFor({-> term_getcursor(vim.buf)[0] == 1})
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142 let after = s:monitor_memory_usage(vim.pid)
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143
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144 " Rerun Xtest.vim.
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145 for _ in range(3)
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146 call term_sendkeys(vim.buf, ":so %\<CR>")
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147 call WaitFor({-> term_getcursor(vim.buf)[0] == 1})
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148 let last = s:monitor_memory_usage(vim.pid).last
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149 endfor
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150
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151 " The usage may be a bit less than the last value, use 80%.
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152 " Allow for 20% tolerance at the upper limit. That's very permissive, but
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153 " otherwise the test fails sometimes.
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154 let lower = before * 8 / 10
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155 let upper = (after.max + (after.last - before)) * 12 / 10
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156 call assert_inrange(lower, upper, last)
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157
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158 call vim.stop()
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159 call delete(testfile)
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160 endfunc