Filesystem operations slower in 13.0 than 12.2

Christos Chatzaras chris at cretaforce.gr
Fri Mar 5 22:28:01 UTC 2021


I did some more tests. Finally I see similar results (with the exception of one "portsnap extract" test). Also with 13.0 I can't trigger a bug that I describe here:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250576

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Command: /usr/bin/time -l rm -fr /usr/ports /usr/src (these tests done with exactly the same hardware - I upgrade 12.2p4 to 13.0-RC1 for the 2nd test)

FreeBSD 12.2p4

       12.67 real         0.36 user         1.94 sys
      5652  maximum resident set size
         8  average shared memory size
         4  average unshared data size
       139  average unshared stack size
       950  page reclaims
         0  page faults
         0  swaps
     49120  block input operations
       136  block output operations
         0  messages sent
         0  messages received
         0  signals received
     49258  voluntary context switches
         0  involuntary context switches

       13.18 real         0.41 user         1.81 sys
      5896  maximum resident set size
         8  average shared memory size
         4  average unshared data size
       132  average unshared stack size
      1074  page reclaims
         0  page faults
         0  swaps
     19463  block input operations
       136  block output operations
         0  messages sent
         0  messages received
         0  signals received
     19617  voluntary context switches
         7  involuntary context switches

       12.16 real         0.36 user         1.85 sys
      5884  maximum resident set size
         7  average shared memory size
         3  average unshared data size
       125  average unshared stack size
      1046  page reclaims
         0  page faults
         0  swaps
     18942  block input operations
       136  block output operations
         0  messages sent
         0  messages received
         0  signals received
     19096  voluntary context switches
         8  involuntary context switches

FreeBSD 13.0-RC1

       16.71 real         0.63 user         3.02 sys
      5580  maximum resident set size
         7  average shared memory size
         3  average unshared data size
       124  average unshared stack size
       956  page reclaims
         0  page faults
         0  swaps
     24420  block input operations
       136  block output operations
         0  messages sent
         0  messages received
         0  signals received
     24596  voluntary context switches
         8  involuntary context switche

       14.53 real         0.48 user         2.98 sys
      5572  maximum resident set size
         7  average shared memory size
         3  average unshared data size
       123  average unshared stack size
       954  page reclaims
         0  page faults
         0  swaps
     19426  block input operations
       136  block output operations
         0  messages sent
         0  messages received
         0  signals received
     19599  voluntary context switches
        13  involuntary context switches

       13.97 real         0.70 user         2.85 sys
      5580  maximum resident set size
         8  average shared memory size
         4  average unshared data size
       130  average unshared stack size
       956  page reclaims
         0  page faults
         0  swaps
     18310  block input operations
       136  block output operations
         0  messages sent
         0  messages received
         0  signals received
     18477  voluntary context switches
        25  involuntary context switches

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Command: /usr/bin/time -l tar xf src.tar (these tests done with 2 different idle servers but with same 4TB HDDs models)

FreeBSD 12.2p4

       37.35 real         1.03 user         3.34 sys
      8644  maximum resident set size
        36  average shared memory size
         4  average unshared data size
       129  average unshared stack size
       773  page reclaims
        16  page faults
         0  swaps
        60  block input operations
      4042  block output operations
         0  messages sent
         0  messages received
         0  signals received
       874  voluntary context switches
        18  involuntary context switches

FreeBSD 13.0-RC1

       44.97 real         1.15 user         3.34 sys
      8840  maximum resident set size
        35  average shared memory size
         3  average unshared data size
       127  average unshared stack size
       768  page reclaims
         0  page faults
         0  swaps
         2  block input operations
       422  block output operations
         0  messages sent
         0  messages received
         0  signals received
       304  voluntary context switches
        43  involuntary context switches

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Command: /usr/bin/time -l tar xf ports.tar (these tests done with 2 different idle servers but with same 4TB HDDs models)

FreeBSD 12.2p4

       50.80 real         1.55 user         4.62 sys
     15512  maximum resident set size
        36  average shared memory size
         4  average unshared data size
       128  average unshared stack size
      2476  page reclaims
         0  page faults
         0  swaps
       120  block input operations
      2776  block output operations
         0  messages sent
         0  messages received
         0  signals received
       557  voluntary context switches
       108  involuntary context switches

FreeBSD 13.0-RC1

       59.93 real         1.69 user         4.73 sys
     15680  maximum resident set size
        35  average shared memory size
         3  average unshared data size
       127  average unshared stack size
      2475  page reclaims
         0  page faults
         0  swaps
        28  block input operations
       231  block output operations
         0  messages sent
         0  messages received
         0  signals received
      2179  voluntary context switches
        54  involuntary context switches

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Command: /usr/bin/time -l portsnap extract (these tests done with 2 different idle servers but with same 4TB HDDs models)

FreeBSD 12.2p4

       99.45 real        34.90 user        59.63 sys
     49280  maximum resident set size
        21  average shared memory size
         3  average unshared data size
        87  average unshared stack size
  11822292  page reclaims
         0  page faults
         0  swaps
      1031  block input operations
      1774  block output operations
         0  messages sent
         0  messages received
         0  signals received
    355648  voluntary context switches
       568  involuntary context switches

      100.00 real        34.91 user        59.97 sys
     49280  maximum resident set size
        20  average shared memory size
         3  average unshared data size
        87  average unshared stack size
  11822292  page reclaims
         0  page faults
         0  swaps
       133  block input operations
      2674  block output operations
         0  messages sent
         0  messages received
         0  signals received
    354821  voluntary context switches
       259  involuntary context switches

       82.95 real        35.98 user        60.68 sys
     49280  maximum resident set size
        20  average shared memory size
         2  average unshared data size
        86  average unshared stack size
  11822292  page reclaims
         0  page faults
         0  swaps
         6  block input operations
      1773  block output operations
         0  messages sent
         0  messages received
         0  signals received
    354474  voluntary context switches
       387  involuntary context switches

FreeBSD 13.0-RC1

      217.43 real        75.67 user       110.97 sys
     49176  maximum resident set size
        22  average shared memory size
         3  average unshared data size
        90  average unshared stack size
  12289905  page reclaims
         5  page faults
         0  swaps
     29660  block input operations
       508  block output operations
      4413  messages sent
   2536723  messages received
         0  signals received
    384200  voluntary context switches
       549  involuntary context switches

      125.50 real        63.00 user        96.47 sys
     49176  maximum resident set size
        21  average shared memory size
         3  average unshared data size
        89  average unshared stack size
  12289905  page reclaims
         0  page faults
         0  swaps
       118  block input operations
       171  block output operations
      4413  messages sent
   2536723  messages received
         0  signals received
    354513  voluntary context switches
       444  involuntary context switches

      118.93 real        62.91 user        96.28 sys
     49176  maximum resident set size
        21  average shared memory size
         3  average unshared data size
        89  average unshared stack size
  12289905  page reclaims
         0  page faults
         0  swaps
         0  block input operations
       171  block output operations
      4413  messages sent
   2536723  messages received
         0  signals received
    354404  voluntary context switches
       409  involuntary context switches


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