t/perf/p0008-odb-fsync.sh

   1 #!/bin/sh
   2 #
   3 # This test measures the performance of adding new files to the object
   4 # database. The test was originally added to measure the effect of the
   5 # core.fsyncMethod=batch mode, which is why we are testing different values of
   6 # that setting explicitly and creating a lot of unique objects.
   7
   8 test_description="Tests performance of adding things to the object database"
   9
  10 . ./perf-lib.sh
  11
  12 . $TEST_DIRECTORY/lib-unique-files.sh
  13
  14 test_perf_fresh_repo
  15 test_checkout_worktree
  16
  17 dir_count=10
  18 files_per_dir=50
  19 total_files=$((dir_count * files_per_dir))
  20
  21 populate_files () {
  22         test_create_unique_files $dir_count $files_per_dir files
  23 }
  24
  25 setup_repo () {
  26         (rm -rf .git || 1) &&
  27         git init &&
  28         test_commit first &&
  29         populate_files
  30 }
  31
  32 test_perf_fsync_cfgs () {
  33         local method &&
  34         local cfg &&
  35         for method in none fsync batch writeout-only
  36         do
  37                 case $method in
  38                 none)
  39                         cfg="-c core.fsync=none"
  40                         ;;
  41                 *)
  42                         cfg="-c core.fsync=loose-object -c core.fsyncMethod=$method"
  43                 esac &&
  44
  45                 # Set GIT_TEST_FSYNC=1 explicitly since fsync is normally
  46                 # disabled by t/test-lib.sh.
  47                 if ! test_perf "$1 (fsyncMethod=$method)" \
  48                                                 --setup "$2" \
  49                                                 "GIT_TEST_FSYNC=1 git $cfg $3"
  50                 then
  51                         break
  52                 fi
  53         done
  54 }
  55
  56 test_perf_fsync_cfgs "add $total_files files" \
  57         "setup_repo" \
  58         "add -- files"
  59
  60 test_perf_fsync_cfgs "stash $total_files files" \
  61         "setup_repo" \
  62         "stash push -u -- files"
  63
  64 test_perf_fsync_cfgs "unpack $total_files files" \
  65         "
  66         setup_repo &&
  67         git -c core.fsync=none add -- files &&
  68         git -c core.fsync=none commit -q -m second &&
  69         echo HEAD | git pack-objects -q --stdout --revs >test_pack.pack &&
  70         setup_repo
  71         " \
  72         "unpack-objects -q <test_pack.pack"
  73
  74 test_perf_fsync_cfgs "commit $total_files files" \
  75         "
  76         setup_repo &&
  77         git -c core.fsync=none add -- files &&
  78         populate_files
  79         " \
  80         "commit -q -a -m test"
  81
  82 test_done