[PATCH] rtld: skip symbol table index queries if possible

[Fabian Rast]

PS:
By moving the check to after the (cheap) bloom filter test, the performance
regressions can be somewhat mitigated: (although mpv still regresses)

gsx master -> patch:
cycles:	 49511928.0 (0.5) -> 48309150.0 (0.61) -2.43%
instructions:	 96714427.0 (0.02) -> 94925174.0 (0.02) -1.85%
ref-cycles:	 49827642.0 (0.49) -> 48485890.0 (0.6) -2.69%
duration_time:	 26654269.0 (0.53) -> 26374543.0 (0.6) -1.05%

clang master -> patch:
cycles:	 18645892.0 (0.79) -> 16779085.0 (0.96) -10.01%
instructions:	 33353491.0 (0.03) -> 30669379.0 (0.04) -8.05%
ref-cycles:	 18791519.0 (0.78) -> 16856078.0 (0.93) -10.3%
duration_time:	 10919684.0 (0.79) -> 9761956.0 (0.84) -10.6%

libxul.so master -> patch:
cycles:	 56422341.0 (0.39) -> 55357468.0 (0.17) -1.89%
instructions:	 106624464.0 (0.02) -> 105136223.0 (0.02) -1.4%
ref-cycles:	 56607275.0 (0.4) -> 55664920.0 (0.16) -1.66%
duration_time:	 30546299.0 (0.41) -> 29750872.0 (0.22) -2.6%

mpv master -> patch:
cycles:	 314099011.0 (0.21) -> 318358470.0 (0.81) 1.36%
instructions:	 677780066.0 (0.0) -> 673323695.0 (0.0) -0.66%
ref-cycles:	 314961136.0 (0.21) -> 319159082.0 (0.81) 1.33%
duration_time:	 162160054.0 (0.22) -> 164245741.0 (0.81) 1.29%

soffice.bin master -> patch:
cycles:	 107442359.0 (0.35) -> 105643296.0 (0.38) -1.67%
instructions:	 210582572.0 (0.01) -> 207872207.0 (0.01) -1.29%
ref-cycles:	 107718073.0 (0.34) -> 105922170.0 (0.37) -1.67%
duration_time:	 56930644.0 (0.36) -> 56028308.0 (0.4) -1.58%

libwebkit2gtk-4.1.so.0 master -> patch:
cycles:	 101683238.0 (0.5) -> 101060189.0 (0.35) -0.61%
instructions:	 203963211.0 (0.01) -> 201421932.0 (0.01) -1.25%
ref-cycles:	 101917770.0 (0.5) -> 101343442.0 (0.35) -0.56%
duration_time:	 54116019.0 (0.5) -> 53812176.0 (0.38) -0.56%

ffmpeg master -> patch:
cycles:	 258467344.0 (0.16) -> 255652866.0 (0.18) -1.09%
instructions:	 555742911.0 (0.0) -> 551118490.0 (0.01) -0.83%
ref-cycles:	 259027863.0 (0.15) -> 256183545.0 (0.19) -1.1%
duration_time:	 133863408.0 (0.17) -> 132381031.0 (0.2) -1.11%
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 293 bytes
Desc: not available
URL: <https://sourceware.org/pipermail/libc-alpha/attachments/20260212/f5b9628c/attachment.sig>