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Commit 13f149f0 authored by Kirill Smelkov's avatar Kirill Smelkov
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X zodb/cache: Kill cache-gc tracepoint 

On NoHit workloads gc is invoked for every load and since cache's goal
is to provide minimum slowdown the tracepoint overhead becomes visible.

Cache gc tracepoints were initially added for testing - to be able to
wait for gc to start/finish - when gc was running in its own goroutine,
but now, after 0e2be3b3 (X zodb/cache: Performing GC in separate
goroutine was actually a bad idea), when gc is running synchronously
there is need for this tracing events even from testing point of view.

So remove them.

---- 8< ----

name                        old time/op    new time/op    delta
NoopStorage                   57.9ns ± 1%    56.6ns ± 1%   -2.30%  (p=0.100 n=3+3)
NoopStorage-4                 57.4ns ± 1%    56.4ns ± 0%   -1.68%  (p=0.100 n=3+3)
CacheStartup                  2.13µs ±16%    1.95µs ± 2%     ~     (p=0.700 n=3+3)
CacheStartup-4                1.29µs ± 4%    1.31µs ± 5%     ~     (p=0.700 n=3+3)
CacheNoHit/size=0              677ns ± 1%     590ns ± 1%  -12.86%  (p=0.100 n=3+3)
CacheNoHit/size=0-4            664ns ± 1%     591ns ± 1%  -11.04%  (p=0.100 n=3+3)
CacheNoHit/size=16             792ns ± 0%     707ns ± 0%  -10.81%  (p=0.100 n=3+3)
CacheNoHit/size=16-4           788ns ± 0%     711ns ± 1%   -9.85%  (p=0.100 n=3+3)
CacheNoHit/size=128            796ns ± 0%     717ns ± 0%   -9.93%  (p=0.100 n=3+3)
CacheNoHit/size=128-4          795ns ± 1%     716ns ± 0%   -9.86%  (p=0.100 n=3+3)
CacheNoHit/size=512            816ns ± 0%     737ns ± 0%   -9.69%  (p=0.100 n=3+3)
CacheNoHit/size=512-4          803ns ± 0%     721ns ± 0%  -10.25%  (p=0.100 n=3+3)
CacheNoHit/size=4096          1.05µs ± 1%    0.95µs ± 1%  -10.13%  (p=0.100 n=3+3)
CacheNoHit/size=4096-4         856ns ± 0%     780ns ± 1%   -8.91%  (p=0.100 n=3+3)
CacheHit/size=0                664ns ± 0%     589ns ± 1%  -11.34%  (p=0.100 n=3+3)
CacheHit/size=0-4              660ns ± 0%     588ns ± 0%  -10.86%  (p=0.100 n=3+3)
CacheHit/size=16               123ns ± 4%     122ns ± 1%     ~     (p=0.800 n=3+3)
CacheHit/size=16-4             121ns ± 1%     123ns ± 1%     ~     (p=0.300 n=3+3)
CacheHit/size=128              124ns ± 1%     127ns ± 2%   +2.70%  (p=0.100 n=3+3)
CacheHit/size=128-4            124ns ± 1%     126ns ± 1%   +2.16%  (p=0.100 n=3+3)
CacheHit/size=512              126ns ± 1%     128ns ± 2%     ~     (p=0.400 n=3+3)
CacheHit/size=512-4            125ns ± 1%     127ns ± 1%   +1.60%  (p=0.100 n=3+3)
CacheHit/size=4096             127ns ± 1%     130ns ± 0%   +2.09%  (p=0.100 n=3+3)
CacheHit/size=4096-4           128ns ± 1%     130ns ± 1%   +1.56%  (p=0.100 n=3+3)
NoopStoragePar                59.2ns ± 1%    59.7ns ± 3%     ~     (p=1.000 n=3+3)
NoopStoragePar-4              31.2ns ± 8%    31.3ns ± 8%     ~     (p=1.000 n=3+3)
CacheStartupPar               2.04µs ± 6%    1.97µs ±13%     ~     (p=1.000 n=3+3)
CacheStartupPar-4             1.48µs ± 3%    1.49µs ± 4%     ~     (p=0.700 n=3+3)
CacheNoHitPar/size=0           670ns ± 0%     591ns ± 0%  -11.75%  (p=0.100 n=3+3)
CacheNoHitPar/size=0-4         904ns ± 0%     811ns ± 0%  -10.32%  (p=0.100 n=3+3)
CacheNoHitPar/size=16          789ns ± 0%     713ns ± 0%   -9.63%  (p=0.100 n=3+3)
CacheNoHitPar/size=16-4       1.03µs ± 0%    0.92µs ± 0%  -10.06%  (p=0.100 n=3+3)
CacheNoHitPar/size=128         800ns ± 0%     717ns ± 0%  -10.45%  (p=0.100 n=3+3)
CacheNoHitPar/size=128-4      1.04µs ± 0%    0.95µs ± 0%   -8.63%  (p=0.100 n=3+3)
CacheNoHitPar/size=512         818ns ± 0%     733ns ± 0%  -10.35%  (p=0.100 n=3+3)
CacheNoHitPar/size=512-4      1.07µs ± 0%    0.97µs ± 0%   -9.04%  (p=0.100 n=3+3)
CacheNoHitPar/size=4096       1.06µs ± 1%    0.94µs ± 0%  -11.50%  (p=0.100 n=3+3)
CacheNoHitPar/size=4096-4     1.17µs ± 1%    1.07µs ± 0%   -7.89%  (p=0.100 n=3+3)
CacheHitPar/size=0             665ns ± 0%     587ns ± 0%  -11.69%  (p=0.100 n=3+3)
CacheHitPar/size=0-4           903ns ± 1%     805ns ± 0%  -10.85%  (p=0.100 n=3+3)
CacheHitPar/size=16            124ns ± 1%     122ns ± 1%     ~     (p=0.200 n=3+3)
CacheHitPar/size=16-4          217ns ± 1%     236ns ± 1%   +8.74%  (p=0.100 n=3+3)
CacheHitPar/size=128           125ns ± 0%     125ns ± 1%     ~     (p=1.000 n=3+3)
CacheHitPar/size=128-4         215ns ± 1%     220ns ± 0%   +2.48%  (p=0.100 n=3+3)
CacheHitPar/size=512           127ns ± 1%     127ns ± 2%     ~     (p=0.600 n=3+3)
CacheHitPar/size=512-4         241ns ± 0%     219ns ± 0%   -9.14%  (p=0.100 n=3+3)
CacheHitPar/size=4096          129ns ± 0%     129ns ± 1%     ~     (p=1.000 n=3+3)
CacheHitPar/size=4096-4        236ns ± 4%     223ns ± 5%     ~     (p=0.200 n=3+3)
NoopStorageProc               56.1ns ± 0%    54.7ns ± 0%   -2.44%  (p=0.100 n=3+3)
NoopStorageProc-4             37.1ns ±10%    31.8ns ± 4%  -14.45%  (p=0.100 n=3+3)
CacheStartupProc              1.79µs ± 3%    1.88µs ±11%     ~     (p=0.700 n=3+3)
CacheStartupProc-4            1.08µs ± 7%    1.13µs ± 3%     ~     (p=0.400 n=3+3)
CacheNoHitProc/size=0          669ns ± 0%     598ns ± 0%  -10.66%  (p=0.100 n=3+3)
CacheNoHitProc/size=0-4        414ns ±15%     309ns ± 0%  -25.38%  (p=0.100 n=3+3)
CacheNoHitProc/size=16         792ns ± 0%     711ns ± 0%  -10.27%  (p=0.100 n=3+3)
CacheNoHitProc/size=16-4       440ns ± 7%     356ns ± 0%  -19.02%  (p=0.100 n=3+3)
CacheNoHitProc/size=128        808ns ± 0%     722ns ± 1%  -10.61%  (p=0.100 n=3+3)
CacheNoHitProc/size=128-4      467ns ± 8%     363ns ± 0%  -22.29%  (p=0.100 n=3+3)
CacheNoHitProc/size=512        834ns ± 1%     741ns ± 1%  -11.08%  (p=0.100 n=3+3)
CacheNoHitProc/size=512-4      499ns ± 9%     394ns ± 0%  -20.98%  (p=0.100 n=3+3)
CacheNoHitProc/size=4096      1.07µs ± 0%    0.94µs ± 0%  -11.71%  (p=0.100 n=3+3)
CacheNoHitProc/size=4096-4     629ns ± 3%     565ns ± 0%  -10.12%  (p=0.100 n=3+3)
CacheHitProc/size=0            669ns ± 0%     598ns ± 0%  -10.61%  (p=0.100 n=3+3)
CacheHitProc/size=0-4          381ns ± 2%     310ns ± 0%  -18.72%  (p=0.100 n=3+3)
CacheHitProc/size=16           121ns ± 1%     120ns ± 1%     ~     (p=0.400 n=3+3)
CacheHitProc/size=16-4        65.0ns ± 3%    57.5ns ± 2%  -11.59%  (p=0.100 n=3+3)
CacheHitProc/size=128          124ns ± 0%     123ns ± 1%     ~     (p=0.700 n=3+3)
CacheHitProc/size=128-4       74.9ns ± 3%    58.1ns ± 0%  -22.44%  (p=0.100 n=3+3)
CacheHitProc/size=512          125ns ± 1%     126ns ± 2%     ~     (p=0.600 n=3+3)
CacheHitProc/size=512-4       71.5ns ± 2%    58.6ns ± 0%  -17.96%  (p=0.100 n=3+3)
CacheHitProc/size=4096         132ns ± 6%     128ns ± 1%     ~     (p=0.600 n=3+3)
CacheHitProc/size=4096-4      80.5ns ± 7%    69.8ns ± 0%  -13.30%  (p=0.100 n=3+3)

name                        old alloc/op   new alloc/op   delta
NoopStorage                    0.00B          0.00B          ~     (all equal)
NoopStorage-4                  0.00B          0.00B          ~     (all equal)
CacheStartup                    285B ± 0%      285B ± 0%     ~     (all equal)
CacheStartup-4                  285B ± 0%      285B ± 0%     ~     (all equal)
CacheNoHit/size=0               152B ± 0%      152B ± 0%     ~     (all equal)
CacheNoHit/size=0-4             152B ± 0%      152B ± 0%     ~     (all equal)
CacheNoHit/size=16              153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHit/size=16-4            153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHit/size=128             153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHit/size=128-4           153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHit/size=512             153B ± 0%      153B ± 0%     ~     (p=1.000 n=3+3)
CacheNoHit/size=512-4           153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHit/size=4096            153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHit/size=4096-4          152B ± 0%      153B ± 0%     ~     (p=1.000 n=3+3)
CacheHit/size=0                 152B ± 0%      152B ± 0%     ~     (all equal)
CacheHit/size=0-4               152B ± 0%      152B ± 0%     ~     (all equal)
CacheHit/size=16               0.00B          0.00B          ~     (all equal)
CacheHit/size=16-4             0.00B          0.00B          ~     (all equal)
CacheHit/size=128              0.00B          0.00B          ~     (all equal)
CacheHit/size=128-4            0.00B          0.00B          ~     (all equal)
CacheHit/size=512              0.00B          0.00B          ~     (all equal)
CacheHit/size=512-4            0.00B          0.00B          ~     (all equal)
CacheHit/size=4096             0.00B          0.00B          ~     (all equal)
CacheHit/size=4096-4           0.00B          0.00B          ~     (all equal)
NoopStoragePar                 0.00B          0.00B          ~     (all equal)
NoopStoragePar-4               0.00B          0.00B          ~     (all equal)
CacheStartupPar                 285B ± 0%      285B ± 0%     ~     (all equal)
CacheStartupPar-4               281B ± 0%      282B ± 0%     ~     (p=0.300 n=3+3)
CacheNoHitPar/size=0            152B ± 0%      152B ± 0%     ~     (all equal)
CacheNoHitPar/size=0-4          152B ± 0%      152B ± 0%     ~     (all equal)
CacheNoHitPar/size=16           153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHitPar/size=16-4         155B ± 0%      154B ± 0%     ~     (p=0.400 n=3+3)
CacheNoHitPar/size=128          153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHitPar/size=128-4        153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHitPar/size=512          153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHitPar/size=512-4        153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHitPar/size=4096         153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHitPar/size=4096-4       153B ± 0%      153B ± 0%     ~     (all equal)
CacheHitPar/size=0              152B ± 0%      152B ± 0%     ~     (all equal)
CacheHitPar/size=0-4            152B ± 0%      152B ± 0%     ~     (all equal)
CacheHitPar/size=16            0.00B          0.00B          ~     (all equal)
CacheHitPar/size=16-4          0.00B          0.00B          ~     (all equal)
CacheHitPar/size=128           0.00B          0.00B          ~     (all equal)
CacheHitPar/size=128-4         0.00B          0.00B          ~     (all equal)
CacheHitPar/size=512           0.00B          0.00B          ~     (all equal)
CacheHitPar/size=512-4         0.00B          0.00B          ~     (all equal)
CacheHitPar/size=4096          0.00B          0.00B          ~     (all equal)
CacheHitPar/size=4096-4        0.00B          0.00B          ~     (all equal)
NoopStorageProc                0.00B          0.00B          ~     (all equal)
NoopStorageProc-4              0.00B          0.00B          ~     (all equal)
CacheStartupProc                285B ± 0%      285B ± 0%     ~     (all equal)
CacheStartupProc-4              285B ± 0%      285B ± 0%     ~     (all equal)
CacheNoHitProc/size=0           152B ± 0%      152B ± 0%     ~     (all equal)
CacheNoHitProc/size=0-4         152B ± 0%      152B ± 0%     ~     (all equal)
CacheNoHitProc/size=16          153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHitProc/size=16-4        153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHitProc/size=128         153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHitProc/size=128-4       153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHitProc/size=512         153B ± 0%      153B ± 0%     ~     (p=1.000 n=3+3)
CacheNoHitProc/size=512-4       153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHitProc/size=4096        153B ± 0%      153B ± 0%     ~     (all equal)
CacheNoHitProc/size=4096-4      153B ± 0%      153B ± 0%     ~     (all equal)
CacheHitProc/size=0             152B ± 0%      152B ± 0%     ~     (all equal)
CacheHitProc/size=0-4           152B ± 0%      152B ± 0%     ~     (all equal)
CacheHitProc/size=16           0.00B          0.00B          ~     (all equal)
CacheHitProc/size=16-4         0.00B          0.00B          ~     (all equal)
CacheHitProc/size=128          0.00B          0.00B          ~     (all equal)
CacheHitProc/size=128-4        0.00B          0.00B          ~     (all equal)
CacheHitProc/size=512          0.00B          0.00B          ~     (all equal)
CacheHitProc/size=512-4        0.00B          0.00B          ~     (all equal)
CacheHitProc/size=4096         0.00B          0.00B          ~     (all equal)
CacheHitProc/size=4096-4       0.00B          0.00B          ~     (all equal)

name                        old allocs/op  new allocs/op  delta
NoopStorage                     0.00           0.00          ~     (all equal)
NoopStorage-4                   0.00           0.00          ~     (all equal)
CacheStartup                    5.00 ± 0%      5.00 ± 0%     ~     (all equal)
CacheStartup-4                  5.00 ± 0%      5.00 ± 0%     ~     (all equal)
CacheNoHit/size=0               3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHit/size=0-4             3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHit/size=16              3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHit/size=16-4            3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHit/size=128             3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHit/size=128-4           3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHit/size=512             3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHit/size=512-4           3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHit/size=4096            3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHit/size=4096-4          3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheHit/size=0                 3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheHit/size=0-4               3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheHit/size=16                0.00           0.00          ~     (all equal)
CacheHit/size=16-4              0.00           0.00          ~     (all equal)
CacheHit/size=128               0.00           0.00          ~     (all equal)
CacheHit/size=128-4             0.00           0.00          ~     (all equal)
CacheHit/size=512               0.00           0.00          ~     (all equal)
CacheHit/size=512-4             0.00           0.00          ~     (all equal)
CacheHit/size=4096              0.00           0.00          ~     (all equal)
CacheHit/size=4096-4            0.00           0.00          ~     (all equal)
NoopStoragePar                  0.00           0.00          ~     (all equal)
NoopStoragePar-4                0.00           0.00          ~     (all equal)
CacheStartupPar                 5.00 ± 0%      5.00 ± 0%     ~     (all equal)
CacheStartupPar-4               4.00 ± 0%      4.00 ± 0%     ~     (all equal)
CacheNoHitPar/size=0            3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitPar/size=0-4          3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitPar/size=16           3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitPar/size=16-4         3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitPar/size=128          3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitPar/size=128-4        3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitPar/size=512          3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitPar/size=512-4        3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitPar/size=4096         3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitPar/size=4096-4       3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheHitPar/size=0              3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheHitPar/size=0-4            3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheHitPar/size=16             0.00           0.00          ~     (all equal)
CacheHitPar/size=16-4           0.00           0.00          ~     (all equal)
CacheHitPar/size=128            0.00           0.00          ~     (all equal)
CacheHitPar/size=128-4          0.00           0.00          ~     (all equal)
CacheHitPar/size=512            0.00           0.00          ~     (all equal)
CacheHitPar/size=512-4          0.00           0.00          ~     (all equal)
CacheHitPar/size=4096           0.00           0.00          ~     (all equal)
CacheHitPar/size=4096-4         0.00           0.00          ~     (all equal)
NoopStorageProc                 0.00           0.00          ~     (all equal)
NoopStorageProc-4               0.00           0.00          ~     (all equal)
CacheStartupProc                5.00 ± 0%      5.00 ± 0%     ~     (all equal)
CacheStartupProc-4              5.00 ± 0%      5.00 ± 0%     ~     (all equal)
CacheNoHitProc/size=0           3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitProc/size=0-4         3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitProc/size=16          3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitProc/size=16-4        3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitProc/size=128         3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitProc/size=128-4       3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitProc/size=512         3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitProc/size=512-4       3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitProc/size=4096        3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheNoHitProc/size=4096-4      3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheHitProc/size=0             3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheHitProc/size=0-4           3.00 ± 0%      3.00 ± 0%     ~     (all equal)
CacheHitProc/size=16            0.00           0.00          ~     (all equal)
CacheHitProc/size=16-4          0.00           0.00          ~     (all equal)
CacheHitProc/size=128           0.00           0.00          ~     (all equal)
CacheHitProc/size=128-4         0.00           0.00          ~     (all equal)
CacheHitProc/size=512           0.00           0.00          ~     (all equal)
CacheHitProc/size=512-4         0.00           0.00          ~     (all equal)
CacheHitProc/size=4096          0.00           0.00          ~     (all equal)
CacheHitProc/size=4096-4        0.00           0.00          ~     (all equal)
parent 0e2be3b3
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Inline Side-by-side
Showing with 5 additions and 117 deletions
go/zodb/cache.go
View file @ 13f149f0
......@@ -465,15 +465,10 @@ func tryMerge(prev, next, cur *revCacheEntry) bool {
// ---- garbage collection ----
//trace:event traceCacheGCStart(c *Cache)
//trace:event traceCacheGCFinish(c *Cache)
// gc performs garbage-collection.
//
// must be called with .gcMu locked.
func (c *Cache) gc() {
traceCacheGCStart(c)
defer traceCacheGCFinish(c)
//fmt.Printf("\n> gc\n")
//defer fmt.Printf("< gc\n")
......
go/zodb/cache_test.go
View file @ 13f149f0
......@@ -31,9 +31,6 @@ import (
"testing"
"github.com/kylelemons/godebug/pretty"
"lab.nexedi.com/kirr/go123/tracing"
"lab.nexedi.com/kirr/neo/go/xcommon/xtesting"
)
// tStorage implements read-only storage for cache testing
......@@ -103,21 +100,6 @@ func xidat(oid Oid, tid Tid) Xid {
return Xid{Oid: oid, At: tid}
}
// tracer which collects tracing events from all needed-for-tests sources
type tTracer struct {
*xtesting.SyncTracer
}
type evCacheGCStart struct {
c *Cache
}
func (t *tTracer) traceCacheGCStart(c *Cache) { t.Trace1(&evCacheGCStart{c}) }
type evCacheGCFinish struct {
c *Cache
}
func (t *tTracer) traceCacheGCFinish(c *Cache) { t.Trace1(&evCacheGCFinish{c}) }
func TestCache(t *testing.T) {
// XXX hack; place=ok?
pretty.CompareConfig.PrintStringers = true
......@@ -513,29 +495,11 @@ func TestCache(t *testing.T) {
// ---- verify LRU eviction ----
// (attach to Cache GC tracepoints)
tracer := &tTracer{xtesting.NewSyncTracer()}
pg := &tracing.ProbeGroup{}
//defer pg.Done()
tracing.Lock()
traceCacheGCStart_Attach(pg, tracer.traceCacheGCStart)
traceCacheGCFinish_Attach(pg, tracer.traceCacheGCFinish)
tracing.Unlock()
// trace-checker for the events
tc := xtesting.NewTraceChecker(t, tracer.SyncTracer)
gcstart := &evCacheGCStart{c}
gcfinish := &evCacheGCFinish{c}
checkOIDV(1)
checkOCE(1, rce1_h3, rce1_h6, rce1_h7, rce1_h8, rce1_h9, rce1_h15, rce1_h19, rce1_h21)
checkMRU(17, rce1_h15, rce1_h6, rce1_h8, rce1_h21, rce1_h19, rce1_h9, rce1_h7, rce1_h3)
go c.SetSizeMax(16) // < c.size by 1 -> should trigger gc
tc.Expect(gcstart, gcfinish)
c.SetSizeMax(16) // < c.size by 1 -> should trigger gc
// evicted:
// - 3] (lru.1, nodata, size=0) XXX ok to evict nodata & friends?
......@@ -547,8 +511,7 @@ func TestCache(t *testing.T) {
checkMRU(15, rce1_h15, rce1_h6, rce1_h8, rce1_h21)
// reload 19] -> 21] should be evicted
go c.Load(ctx, xidat(1,19))
tc.Expect(gcstart, gcfinish)
c.Load(ctx, xidat(1,19))
// - evicted 21] (lru.1, www, size=3)
// - loaded 19] (zz, size=2)
......@@ -561,8 +524,7 @@ func TestCache(t *testing.T) {
checkMRU(14, rce1_h19_2, rce1_h15, rce1_h6, rce1_h8)
// load big 77] -> several rce must be evicted
go c.Load(ctx, xidat(1,77))
tc.Expect(gcstart, gcfinish)
c.Load(ctx, xidat(1,77))
// - evicted 8] (lru.1, ioerr, size=0)
// - evicted 6] (lru.2, hello, size=5)
......@@ -576,16 +538,14 @@ func TestCache(t *testing.T) {
checkMRU(12, rce1_h77, rce1_h19_2)
// sizeMax=0 evicts everything from cache
go c.SetSizeMax(0)
tc.Expect(gcstart, gcfinish)
c.SetSizeMax(0)
checkOIDV()
checkMRU(0)
// and still loading works (because even if though rce's are evicted
// they stay live while someone user waits and uses it)
go checkLoad(xidat(1,4), b(hello), 4, nil)
tc.Expect(gcstart, gcfinish)
checkLoad(xidat(1,4), b(hello), 4, nil)
checkOIDV()
checkMRU(0)
......@@ -614,7 +574,6 @@ func TestCache(t *testing.T) {
// it is hard to check this via stable tracepoints because, if done so,
// after the problem is fixed the test will deadlock.
// So test it probabilistically instead.
pg.Done()
c.SetSizeMax(0) // we want to GC to be constantly running
for i := 0; i < 1e4; i++ {
// issue Prefetch: this should create RCE and spawn loadRCE for it
......
go/zodb/ztrace.go deleted 100644 → 0
View file @ 0e2be3b3
// Code generated by lab.nexedi.com/kirr/go123/tracing/cmd/gotrace; DO NOT EDIT.
package zodb
// code generated for tracepoints
import (
"lab.nexedi.com/kirr/go123/tracing"
"unsafe"
)
// traceevent: traceCacheGCFinish(c *Cache)
type _t_traceCacheGCFinish struct {
tracing.Probe
probefunc func(c *Cache)
}
var _traceCacheGCFinish *_t_traceCacheGCFinish
func traceCacheGCFinish(c *Cache) {
if _traceCacheGCFinish != nil {
_traceCacheGCFinish_run(c)
}
}
func _traceCacheGCFinish_run(c *Cache) {
for p := _traceCacheGCFinish; p != nil; p = (*_t_traceCacheGCFinish)(unsafe.Pointer(p.Next())) {
p.probefunc(c)
}
}
func traceCacheGCFinish_Attach(pg *tracing.ProbeGroup, probe func(c *Cache)) *tracing.Probe {
p := _t_traceCacheGCFinish{probefunc: probe}
tracing.AttachProbe(pg, (**tracing.Probe)(unsafe.Pointer(&_traceCacheGCFinish)), &p.Probe)
return &p.Probe
}
// traceevent: traceCacheGCStart(c *Cache)
type _t_traceCacheGCStart struct {
tracing.Probe
probefunc func(c *Cache)
}
var _traceCacheGCStart *_t_traceCacheGCStart
func traceCacheGCStart(c *Cache) {
if _traceCacheGCStart != nil {
_traceCacheGCStart_run(c)
}
}
func _traceCacheGCStart_run(c *Cache) {
for p := _traceCacheGCStart; p != nil; p = (*_t_traceCacheGCStart)(unsafe.Pointer(p.Next())) {
p.probefunc(c)
}
}
func traceCacheGCStart_Attach(pg *tracing.ProbeGroup, probe func(c *Cache)) *tracing.Probe {
p := _t_traceCacheGCStart{probefunc: probe}
tracing.AttachProbe(pg, (**tracing.Probe)(unsafe.Pointer(&_traceCacheGCStart)), &p.Probe)
return &p.Probe
}
// trace export signature
func _trace_exporthash_6392b85af001a55df3eb1603d80173377a81fc9a() {}
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