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annotate tests/test-debugcommands.t @ 23255:76effa770ff9

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revlog: add config variable for limiting delta-chain length The current heuristic for deciding between storing delta and full texts is based on ratio of (sizeofdeltas)/(sizeoffulltext). In some cases (for example a manifest for ahuge repo) this approach can result in extremely long delta chains (~30,000) which are very slow to read. (In the case of a manifest ~500ms are added to every hg command because of that). This commit introduces "revlog.maxchainlength" configuration variable that will limit delta chain length.
author Mateusz Kwapich <mitrandir@fb.com>
date Thu, 06 Nov 2014 14:20:05 -0800
parents 01df3660eb11
children 1c11393d5dfb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 $ hg init debugrevlog
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2 $ cd debugrevlog
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3 $ echo a > a
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4 $ hg ci -Am adda
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5 adding a
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6 $ hg debugrevlog -m
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7 format : 1
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8 flags : inline
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9
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10 revisions : 1
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11 merges : 0 ( 0.00%)
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12 normal : 1 (100.00%)
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13 revisions : 1
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14 full : 1 (100.00%)
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15 deltas : 0 ( 0.00%)
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16 revision size : 44
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17 full : 44 (100.00%)
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18 deltas : 0 ( 0.00%)
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19
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20 avg chain length : 0
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21 compression ratio : 0
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22
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23 uncompressed data size (min/max/avg) : 43 / 43 / 43
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24 full revision size (min/max/avg) : 44 / 44 / 44
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25 delta size (min/max/avg) : 0 / 0 / 0
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26
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27 Test max chain len
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28 $ cat >> $HGRCPATH << EOF
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29 > [revlog]
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30 > maxchainlen=4
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31 > EOF
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32
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33 $ echo "This test checks if maxchainlen config value is respected also it can serve as basic test for debugrevlog -d <file>.\n" >> a
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34 $ hg ci -m a
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35 $ echo "b\n" >> a
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36 $ hg ci -m a
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37 $ echo "c\n" >> a
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38 $ hg ci -m a
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39 $ echo "d\n" >> a
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40 $ hg ci -m a
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41 $ echo "e\n" >> a
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42 $ hg ci -m a
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43 $ echo "f\n" >> a
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44 $ hg ci -m a
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45 $ echo 'g\n' >> a
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46 $ hg ci -m a
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47 $ echo 'h\n' >> a
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48 $ hg ci -m a
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49 $ hg debugrevlog -d a
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50 # rev p1rev p2rev start end deltastart base p1 p2 rawsize totalsize compression heads chainlen
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51 0 -1 -1 0 ??? 0 0 0 0 ??? ???? ? 1 0 (glob)
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52 1 0 -1 ??? ??? 0 0 0 0 ??? ???? ? 1 1 (glob)
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53 2 1 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 2 (glob)
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54 3 2 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 3 (glob)
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55 4 3 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 4 (glob)
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56 5 4 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 0 (glob)
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57 6 5 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 1 (glob)
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58 7 6 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 2 (glob)
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59 8 7 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 3 (glob)
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60 $ cd ..
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61
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62 Test internal debugstacktrace command
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63
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64 $ cat > debugstacktrace.py << EOF
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65 > from mercurial.util import debugstacktrace, dst, sys
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66 > def f():
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67 > dst('hello world')
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68 > def g():
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69 > f()
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70 > debugstacktrace(skip=-5, f=sys.stdout)
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71 > g()
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72 > EOF
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73 $ python debugstacktrace.py
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74 hello world at:
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75 debugstacktrace.py:7 in * (glob)
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76 debugstacktrace.py:5 in g
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77 debugstacktrace.py:3 in f
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78 stacktrace at:
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79 debugstacktrace.py:7 *in * (glob)
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80 debugstacktrace.py:6 *in g (glob)
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81 */util.py:* in debugstacktrace (glob)