/* * Copyright (c) 2025, BELLSOFT. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package org.openjdk.bench.vm.compiler; import java.util.concurrent.TimeUnit; import org.openjdk.jmh.annotations.*; import org.openjdk.jmh.infra.Blackhole; @BenchmarkMode({Mode.AverageTime}) @OutputTimeUnit(TimeUnit.NANOSECONDS) @State(Scope.Thread) @Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS) @Measurement(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS) @Fork(value = 1) public class UnstableIf { private static int iteration; private static char[] data; private static int max_index; @Setup public void setup() { max_index = 999_999; data = new char[max_index + 1]; data[max_index] = 'a'; iteration = 0; } // Run with: -XX:PerMethodRecompilationCutoff=2 // Expect: on the third deoptimization C2 reaches the recompilation cutoff; // the method is no longer recompiled or marked non-entrant, // so each call repeatedly triggers the same [unstable_if trap -> deopt] again // Result: performance drops roughly 1:1000; deoptimizations can be seen with -Xlog:deoptimization=debug // @Benchmark @CompilerControl(CompilerControl.Mode.DONT_INLINE) public int deoptStormDefault() { iteration = (iteration < max_index) ? iteration + 1 : 0; // First array iteration: profiling makes C2 believe this condition is always true, // so it compiles the false branch as an uncommon trap (action=reinterpret). // Later, when that branch actually executes, it triggers uncommon_trap, causing a deoptimization. if (data[iteration] == 'a') { data[iteration] = 'b'; return 1; } // At the end of the second iteration over the array we are going to fail with the same uncommon trap // (with the recompiled nmethod now). if (data[iteration] == 'b') { data[iteration] = 'c'; return 2; } // If C2 is tired of recompiling the method (force it with PerMethodRecompilationCutoff=2), // it can insert uncommon_trap with action=none, so the deoptimization does not hit recompilation. // If we force this case to execute often, it will cause a lot of deoptimizations. if (data[iteration] == 'c') { max_index = 1; data[max_index] = 'c'; return 4; } return 0; } public char[] data1 = new char[1_000_000]; @Setup public void setup1() { iteration = 0; java.util.Arrays.fill(data1, (char) 0); data1[999_999] = (char)1; } // Run with: -XX:PerMethodTrapLimit=300 // Expect: ~210 uncommon_trap events (reason=unstable_if) that trigger recompilations // See: -XX:+PrintCompilation or -Xlog:deoptimization=debug // // What this does: // - Iterates over data1[0..999_999]; only the last element is initialized to non-zero value, the rest are 0 // - C2 initially compiles never-taken branches as uncommon_trap nodes (based on profiling) // - On each full array pass, one new `if` condition becomes true, // causing the previous speculation to fail -> unstable_if trap -> deopt -> reinterpret -> recompile // - Deopt/recompile cycle continues until PerMethodTrapLimit is reached (100 by default) or all speculations are resolved // // $ jdk/bin/java -jar benchmarks.jar -jvmArgs "-XX:PerMethodTrapLimit=300" UnstableIf.deoptStorm200UncommonTraps // # Warmup Iteration 1: 31.144 ns/op // # Warmup Iteration 2: 31.183 ns/op // # Warmup Iteration 3: 31.906 ns/op // # Warmup Iteration 4: 32.455 ns/op // # Warmup Iteration 5: 32.757 ns/op // # Warmup Iteration 6: 33.109 ns/op // # Warmup Iteration 7: 44.046 ns/op // # Warmup Iteration 8: 390.822 ns/op <--- deopt storm result: deoptimization happens without recompilation // # Warmup Iteration 9: 388.143 ns/op // # Warmup Iteration 10: 386.574 ns/op // @Benchmark @CompilerControl(CompilerControl.Mode.DONT_INLINE) @Warmup(iterations = 20, time = 1, timeUnit = TimeUnit.SECONDS) public int deoptStorm200UncommonTraps() { iteration = (iteration < max_index) ? iteration + 1 : 0; if (data1[iteration] == (char)1) { data1[iteration] = (char)2; return 0x1; } if (data1[iteration] == (char)2) { data1[iteration] = (char)3; return 0x2; } if (data1[iteration] == (char)3) { data1[iteration] = (char)4; return 0x3; } if (data1[iteration] == (char)4) { data1[iteration] = (char)5; return 0x4; } if (data1[iteration] == (char)5) { data1[iteration] = (char)6; return 0x5; } if (data1[iteration] == (char)6) { data1[iteration] = (char)7; return 0x6; } if (data1[iteration] == (char)7) { data1[iteration] = (char)8; return 0x7; } if (data1[iteration] == (char)8) { data1[iteration] = (char)9; return 0x8; } if (data1[iteration] == (char)9) { data1[iteration] = (char)10; return 0x9; } if (data1[iteration] == (char)10) { data1[iteration] = (char)11; return 0xa; } if (data1[iteration] == (char)11) { data1[iteration] = (char)12; return 0xb; } if (data1[iteration] == (char)12) { data1[iteration] = (char)13; return 0xc; } if (data1[iteration] == (char)13) { data1[iteration] = (char)14; return 0xd; } if (data1[iteration] == (char)14) { data1[iteration] = (char)15; return 0xe; } if (data1[iteration] == (char)15) { data1[iteration] = (char)16; return 0xf; } if (data1[iteration] == (char)16) { data1[iteration] = (char)17; return 0x10; } if (data1[iteration] == (char)17) { data1[iteration] = (char)18; return 0x11; } if (data1[iteration] == (char)18) { data1[iteration] = (char)19; return 0x12; } if (data1[iteration] == (char)19) { data1[iteration] = (char)20; return 0x13; } if (data1[iteration] == (char)20) { data1[iteration] = (char)21; return 0x14; } if (data1[iteration] == (char)21) { data1[iteration] = (char)22; return 0x15; } if (data1[iteration] == (char)22) { data1[iteration] = (char)23; return 0x16; } if (data1[iteration] == (char)23) { data1[iteration] = (char)24; return 0x17; } if (data1[iteration] == (char)24) { data1[iteration] = (char)25; return 0x18; } if (data1[iteration] == (char)25) { data1[iteration] = (char)26; return 0x19; } if (data1[iteration] == (char)26) { data1[iteration] = (char)27; return 0x1a; } if (data1[iteration] == (char)27) { data1[iteration] = (char)28; return 0x1b; } if (data1[iteration] == (char)28) { data1[iteration] = (char)29; return 0x1c; } if (data1[iteration] == (char)29) { data1[iteration] = (char)30; return 0x1d; } if (data1[iteration] == (char)30) { data1[iteration] = (char)31; return 0x1e; } if (data1[iteration] == (char)31) { data1[iteration] = (char)32; return 0x1f; } if (data1[iteration] == (char)32) { data1[iteration] = (char)33; return 0x20; } if (data1[iteration] == (char)33) { data1[iteration] = (char)34; return 0x21; } if (data1[iteration] == (char)34) { data1[iteration] = (char)35; return 0x22; } if (data1[iteration] == (char)35) { data1[iteration] = (char)36; return 0x23; } if (data1[iteration] == (char)36) { data1[iteration] = (char)37; return 0x24; } if (data1[iteration] == (char)37) { data1[iteration] = (char)38; return 0x25; } if (data1[iteration] == (char)38) { data1[iteration] = (char)39; return 0x26; } if (data1[iteration] == (char)39) { data1[iteration] = (char)40; return 0x27; } if (data1[iteration] == (char)40) { data1[iteration] = (char)41; return 0x28; } if (data1[iteration] == (char)41) { data1[iteration] = (char)42; return 0x29; } if (data1[iteration] == (char)42) { data1[iteration] = (char)43; return 0x2a; } if (data1[iteration] == (char)43) { data1[iteration] = (char)44; return 0x2b; } if (data1[iteration] == (char)44) { data1[iteration] = (char)45; return 0x2c; } if (data1[iteration] == (char)45) { data1[iteration] = (char)46; return 0x2d; } if (data1[iteration] == (char)46) { data1[iteration] = (char)47; return 0x2e; } if (data1[iteration] == (char)47) { data1[iteration] = (char)48; return 0x2f; } if (data1[iteration] == (char)48) { data1[iteration] = (char)49; return 0x30; } if (data1[iteration] == (char)49) { data1[iteration] = (char)50; return 0x31; } if (data1[iteration] == (char)50) { data1[iteration] = (char)51; return 0x32; } if (data1[iteration] == (char)51) { data1[iteration] = (char)52; return 0x33; } if (data1[iteration] == (char)52) { data1[iteration] = (char)53; return 0x34; } if (data1[iteration] == (char)53) { data1[iteration] = (char)54; return 0x35; } if (data1[iteration] == (char)54) { data1[iteration] = (char)55; return 0x36; } if (data1[iteration] == (char)55) { data1[iteration] = (char)56; return 0x37; } if (data1[iteration] == (char)56) { data1[iteration] = (char)57; return 0x38; } if (data1[iteration] == (char)57) { data1[iteration] = (char)58; return 0x39; } if (data1[iteration] == (char)58) { data1[iteration] = (char)59; return 0x3a; } if (data1[iteration] == (char)59) { data1[iteration] = (char)60; return 0x3b; } if (data1[iteration] == (char)60) { data1[iteration] = (char)61; return 0x3c; } if (data1[iteration] == (char)61) { data1[iteration] = (char)62; return 0x3d; } if (data1[iteration] == (char)62) { data1[iteration] = (char)63; return 0x3e; } if (data1[iteration] == (char)63) { data1[iteration] = (char)64; return 0x3f; } if (data1[iteration] == (char)64) { data1[iteration] = (char)65; return 0x40; } if (data1[iteration] == (char)65) { data1[iteration] = (char)66; return 0x41; } if (data1[iteration] == (char)66) { data1[iteration] = (char)67; return 0x42; } if (data1[iteration] == (char)67) { data1[iteration] = (char)68; return 0x43; } if (data1[iteration] == (char)68) { data1[iteration] = (char)69; return 0x44; } if (data1[iteration] == (char)69) { data1[iteration] = (char)70; return 0x45; } if (data1[iteration] == (char)70) { data1[iteration] = (char)71; return 0x46; } if (data1[iteration] == (char)71) { data1[iteration] = (char)72; return 0x47; } if (data1[iteration] == (char)72) { data1[iteration] = (char)73; return 0x48; } if (data1[iteration] == (char)73) { data1[iteration] = (char)74; return 0x49; } if (data1[iteration] == (char)74) { data1[iteration] = (char)75; return 0x4a; } if (data1[iteration] == (char)75) { data1[iteration] = (char)76; return 0x4b; } if (data1[iteration] == (char)76) { data1[iteration] = (char)77; return 0x4c; } if (data1[iteration] == (char)77) { data1[iteration] = (char)78; return 0x4d; } if (data1[iteration] == (char)78) { data1[iteration] = (char)79; return 0x4e; } if (data1[iteration] == (char)79) { data1[iteration] = (char)80; return 0x4f; } if (data1[iteration] == (char)80) { data1[iteration] = (char)81; return 0x50; } if (data1[iteration] == (char)81) { data1[iteration] = (char)82; return 0x51; } if (data1[iteration] == (char)82) { data1[iteration] = (char)83; return 0x52; } if (data1[iteration] == (char)83) { data1[iteration] = (char)84; return 0x53; } if (data1[iteration] == (char)84) { data1[iteration] = (char)85; return 0x54; } if (data1[iteration] == (char)85) { data1[iteration] = (char)86; return 0x55; } if (data1[iteration] == (char)86) { data1[iteration] = (char)87; return 0x56; } if (data1[iteration] == (char)87) { data1[iteration] = (char)88; return 0x57; } if (data1[iteration] == (char)88) { data1[iteration] = (char)89; return 0x58; } if (data1[iteration] == (char)89) { data1[iteration] = (char)90; return 0x59; } if (data1[iteration] == (char)90) { data1[iteration] = (char)91; return 0x5a; } if (data1[iteration] == (char)91) { data1[iteration] = (char)92; return 0x5b; } if (data1[iteration] == (char)92) { data1[iteration] = (char)93; return 0x5c; } if (data1[iteration] == (char)93) { data1[iteration] = (char)94; return 0x5d; } if (data1[iteration] == (char)94) { data1[iteration] = (char)95; return 0x5e; } if (data1[iteration] == (char)95) { data1[iteration] = (char)96; return 0x5f; } if (data1[iteration] == (char)96) { data1[iteration] = (char)97; return 0x60; } if (data1[iteration] == (char)97) { data1[iteration] = (char)98; return 0x61; } if (data1[iteration] == (char)98) { data1[iteration] = (char)99; return 0x62; } if (data1[iteration] == (char)99) { data1[iteration] = (char)100; return 0x63; } if (data1[iteration] == (char)100) { data1[iteration] = (char)101; return 0x64; } if (data1[iteration] == (char)101) { data1[iteration] = (char)102; return 0x65; } if (data1[iteration] == (char)102) { data1[iteration] = (char)103; return 0x66; } if (data1[iteration] == (char)103) { data1[iteration] = (char)104; return 0x67; } if (data1[iteration] == (char)104) { data1[iteration] = (char)105; return 0x68; } if (data1[iteration] == (char)105) { data1[iteration] = (char)106; return 0x69; } if (data1[iteration] == (char)106) { data1[iteration] = (char)107; return 0x6a; } if (data1[iteration] == (char)107) { data1[iteration] = (char)108; return 0x6b; } if (data1[iteration] == (char)108) { data1[iteration] = (char)109; return 0x6c; } if (data1[iteration] == (char)109) { data1[iteration] = (char)110; return 0x6d; } if (data1[iteration] == (char)110) { data1[iteration] = (char)111; return 0x6e; } if (data1[iteration] == (char)111) { data1[iteration] = (char)112; return 0x6f; } if (data1[iteration] == (char)112) { data1[iteration] = (char)113; return 0x70; } if (data1[iteration] == (char)113) { data1[iteration] = (char)114; return 0x71; } if (data1[iteration] == (char)114) { data1[iteration] = (char)115; return 0x72; } if (data1[iteration] == (char)115) { data1[iteration] = (char)116; return 0x73; } if (data1[iteration] == (char)116) { data1[iteration] = (char)117; return 0x74; } if (data1[iteration] == (char)117) { data1[iteration] = (char)118; return 0x75; } if (data1[iteration] == (char)118) { data1[iteration] = (char)119; return 0x76; } if (data1[iteration] == (char)119) { data1[iteration] = (char)120; return 0x77; } if (data1[iteration] == (char)120) { data1[iteration] = (char)121; return 0x78; } if (data1[iteration] == (char)121) { data1[iteration] = (char)122; return 0x79; } if (data1[iteration] == (char)122) { data1[iteration] = (char)123; return 0x7a; } if (data1[iteration] == (char)123) { data1[iteration] = (char)124; return 0x7b; } if (data1[iteration] == (char)124) { data1[iteration] = (char)125; return 0x7c; } if (data1[iteration] == (char)125) { data1[iteration] = (char)126; return 0x7d; } if (data1[iteration] == (char)126) { data1[iteration] = (char)127; return 0x7e; } if (data1[iteration] == (char)127) { data1[iteration] = (char)128; return 0x7f; } if (data1[iteration] == (char)128) { data1[iteration] = (char)129; return 0x80; } if (data1[iteration] == (char)129) { data1[iteration] = (char)130; return 0x81; } if (data1[iteration] == (char)130) { data1[iteration] = (char)131; return 0x82; } if (data1[iteration] == (char)131) { data1[iteration] = (char)132; return 0x83; } if (data1[iteration] == (char)132) { data1[iteration] = (char)133; return 0x84; } if (data1[iteration] == (char)133) { data1[iteration] = (char)134; return 0x85; } if (data1[iteration] == (char)134) { data1[iteration] = (char)135; return 0x86; } if (data1[iteration] == (char)135) { data1[iteration] = (char)136; return 0x87; } if (data1[iteration] == (char)136) { data1[iteration] = (char)137; return 0x88; } if (data1[iteration] == (char)137) { data1[iteration] = (char)138; return 0x89; } if (data1[iteration] == (char)138) { data1[iteration] = (char)139; return 0x8a; } if (data1[iteration] == (char)139) { data1[iteration] = (char)140; return 0x8b; } if (data1[iteration] == (char)140) { data1[iteration] = (char)141; return 0x8c; } if (data1[iteration] == (char)141) { data1[iteration] = (char)142; return 0x8d; } if (data1[iteration] == (char)142) { data1[iteration] = (char)143; return 0x8e; } if (data1[iteration] == (char)143) { data1[iteration] = (char)144; return 0x8f; } if (data1[iteration] == (char)144) { data1[iteration] = (char)145; return 0x90; } if (data1[iteration] == (char)145) { data1[iteration] = (char)146; return 0x91; } if (data1[iteration] == (char)146) { data1[iteration] = (char)147; return 0x92; } if (data1[iteration] == (char)147) { data1[iteration] = (char)148; return 0x93; } if (data1[iteration] == (char)148) { data1[iteration] = (char)149; return 0x94; } if (data1[iteration] == (char)149) { data1[iteration] = (char)150; return 0x95; } if (data1[iteration] == (char)150) { data1[iteration] = (char)151; return 0x96; } if (data1[iteration] == (char)151) { data1[iteration] = (char)152; return 0x97; } if (data1[iteration] == (char)152) { data1[iteration] = (char)153; return 0x98; } if (data1[iteration] == (char)153) { data1[iteration] = (char)154; return 0x99; } if (data1[iteration] == (char)154) { data1[iteration] = (char)155; return 0x9a; } if (data1[iteration] == (char)155) { data1[iteration] = (char)156; return 0x9b; } if (data1[iteration] == (char)156) { data1[iteration] = (char)157; return 0x9c; } if (data1[iteration] == (char)157) { data1[iteration] = (char)158; return 0x9d; } if (data1[iteration] == (char)158) { data1[iteration] = (char)159; return 0x9e; } if (data1[iteration] == (char)159) { data1[iteration] = (char)160; return 0x9f; } if (data1[iteration] == (char)160) { data1[iteration] = (char)161; return 0xa0; } if (data1[iteration] == (char)161) { data1[iteration] = (char)162; return 0xa1; } if (data1[iteration] == (char)162) { data1[iteration] = (char)163; return 0xa2; } if (data1[iteration] == (char)163) { data1[iteration] = (char)164; return 0xa3; } if (data1[iteration] == (char)164) { data1[iteration] = (char)165; return 0xa4; } if (data1[iteration] == (char)165) { data1[iteration] = (char)166; return 0xa5; } if (data1[iteration] == (char)166) { data1[iteration] = (char)167; return 0xa6; } if (data1[iteration] == (char)167) { data1[iteration] = (char)168; return 0xa7; } if (data1[iteration] == (char)168) { data1[iteration] = (char)169; return 0xa8; } if (data1[iteration] == (char)169) { data1[iteration] = (char)170; return 0xa9; } if (data1[iteration] == (char)170) { data1[iteration] = (char)171; return 0xaa; } if (data1[iteration] == (char)171) { data1[iteration] = (char)172; return 0xab; } if (data1[iteration] == (char)172) { data1[iteration] = (char)173; return 0xac; } if (data1[iteration] == (char)173) { data1[iteration] = (char)174; return 0xad; } if (data1[iteration] == (char)174) { data1[iteration] = (char)175; return 0xae; } if (data1[iteration] == (char)175) { data1[iteration] = (char)176; return 0xaf; } if (data1[iteration] == (char)176) { data1[iteration] = (char)177; return 0xb0; } if (data1[iteration] == (char)177) { data1[iteration] = (char)178; return 0xb1; } if (data1[iteration] == (char)178) { data1[iteration] = (char)179; return 0xb2; } if (data1[iteration] == (char)179) { data1[iteration] = (char)180; return 0xb3; } if (data1[iteration] == (char)180) { data1[iteration] = (char)181; return 0xb4; } if (data1[iteration] == (char)181) { data1[iteration] = (char)182; return 0xb5; } if (data1[iteration] == (char)182) { data1[iteration] = (char)183; return 0xb6; } if (data1[iteration] == (char)183) { data1[iteration] = (char)184; return 0xb7; } if (data1[iteration] == (char)184) { data1[iteration] = (char)185; return 0xb8; } if (data1[iteration] == (char)185) { data1[iteration] = (char)186; return 0xb9; } if (data1[iteration] == (char)186) { data1[iteration] = (char)187; return 0xba; } if (data1[iteration] == (char)187) { data1[iteration] = (char)188; return 0xbb; } if (data1[iteration] == (char)188) { data1[iteration] = (char)189; return 0xbc; } if (data1[iteration] == (char)189) { data1[iteration] = (char)190; return 0xbd; } if (data1[iteration] == (char)190) { data1[iteration] = (char)191; return 0xbe; } if (data1[iteration] == (char)191) { data1[iteration] = (char)192; return 0xbf; } if (data1[iteration] == (char)192) { data1[iteration] = (char)193; return 0xc0; } if (data1[iteration] == (char)193) { data1[iteration] = (char)194; return 0xc1; } if (data1[iteration] == (char)194) { data1[iteration] = (char)195; return 0xc2; } if (data1[iteration] == (char)195) { data1[iteration] = (char)196; return 0xc3; } if (data1[iteration] == (char)196) { data1[iteration] = (char)197; return 0xc4; } if (data1[iteration] == (char)197) { data1[iteration] = (char)198; return 0xc5; } if (data1[iteration] == (char)198) { data1[iteration] = (char)199; return 0xc6; } if (data1[iteration] == (char)199) { data1[iteration] = (char)200; return 0xc7; } if (data1[iteration] == (char)200) { data1[iteration] = (char)201; return 0xc8; } if (data1[iteration] == (char)201) { data1[iteration] = (char)202; return 0xc9; } if (data1[iteration] == (char)202) { data1[iteration] = (char)203; return 0xca; } if (data1[iteration] == (char)203) { data1[iteration] = (char)204; return 0xcb; } if (data1[iteration] == (char)204) { data1[iteration] = (char)205; return 0xcc; } if (data1[iteration] == (char)205) { data1[iteration] = (char)206; return 0xcd; } if (data1[iteration] == (char)206) { data1[iteration] = (char)207; return 0xce; } if (data1[iteration] == (char)207) { data1[iteration] = (char)208; return 0xcf; } if (data1[iteration] == (char)208) { data1[iteration] = (char)209; return 0xd0; } if (data1[iteration] == (char)209) { data1[iteration] = (char)210; return 0xd1; } if (data1[iteration] == (char)210) { data1[1] = (char)210; max_index = 2; } return 0; } static final int N = 500_000; static final String GOOD = ""; static final Object BAD = Integer.valueOf(0); Object[] objs; int index; @Setup(Level.Trial) public void setup2() { objs = new Object[N]; for (int i = 0; i < N; i++) objs[i] = GOOD; for (int i = 1; i < 200; i++) objs[N-i] = BAD; index = 0; } static final int PBTL = 20; // min: PerBytecodeTrapLimit static int traps = PBTL; static int stage = 0; static boolean dummy = false; void helper(int idx) { if (traps-- == 0) { objs[idx] = GOOD; traps = PBTL; } index = 0; } // Run with default JVM flags: // jdk/bin/java -jar benchmarks.jar UnstableIf.deoptStormDefaultJVMParams // // Expect: 1. 200 class_check traps with recompilations // 2. 8 unstable_if traps with recompilations // 3. repeated deoptimizations without recompilation // // Deoptimization storm example: // $ jdk/bin/java -Xlog:deoptimization=debug -jar benchmarks.jar UnstableIf.deoptStormDefaultJVMParams // [36.059s][debug][deoptimization] cid= 949 level=4 org.openjdk.bench.vm.compiler.UnstableIf.deoptStormDefaultJVMParams()V trap_bci=6348 unstable_if none pc=0x0000ffff79ad6f00 relative_pc=0x00000000000097c0 // [36.059s][debug][deoptimization] cid= 949 level=4 org.openjdk.bench.vm.compiler.UnstableIf.deoptStormDefaultJVMParams()V trap_bci=6348 unstable_if none pc=0x0000ffff79ad6f00 relative_pc=0x00000000000097c0 // [36.059s][debug][deoptimization] cid= 949 level=4 org.openjdk.bench.vm.compiler.UnstableIf.deoptStormDefaultJVMParams()V trap_bci=6348 unstable_if none pc=0x0000ffff79ad6f00 relative_pc=0x00000000000097c0 // [36.059s][debug][deoptimization] cid= 949 level=4 org.openjdk.bench.vm.compiler.UnstableIf.deoptStormDefaultJVMParams()V trap_bci=6348 unstable_if none pc=0x0000ffff79ad6f00 relative_pc=0x00000000000097c0 // [36.059s][debug][deoptimization] cid= 949 level=4 org.openjdk.bench.vm.compiler.UnstableIf.deoptStormDefaultJVMParams()V trap_bci=6348 unstable_if none pc=0x0000ffff79ad6f00 relative_pc=0x00000000000097c0 // ... // Benchmark Mode Cnt Score Error Units // UnstableIf.deoptStormDefaultJVMParams avgt 3 29427.006 ± 16366.036 ns/op // @Benchmark @CompilerControl(CompilerControl.Mode.DONT_INLINE) @Warmup(iterations = 10, time = 5, timeUnit = TimeUnit.SECONDS) public void deoptStormDefaultJVMParams() { if (stage == 0) { System.out.println(" -- stage 1: collecting 200 speculative deopts -- "); stage = 1; } if (stage == 1) { int sum = 0; index = (index <= objs.length - 400) ? index + 200 : 0; int idx; idx = index + 0; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 1; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 2; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 3; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 4; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 5; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 6; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 7; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 8; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 9; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 10; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 11; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 12; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 13; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 14; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 15; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 16; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 17; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 18; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 19; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 20; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 21; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 22; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 23; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 24; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 25; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 26; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 27; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 28; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 29; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 30; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 31; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 32; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 33; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 34; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 35; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 36; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 37; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 38; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 39; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 40; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 41; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 42; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 43; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 44; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 45; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 46; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 47; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 48; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 49; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 50; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 51; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 52; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 53; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 54; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 55; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 56; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 57; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 58; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 59; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 60; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 61; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 62; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 63; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 64; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 65; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 66; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 67; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 68; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 69; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 70; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 71; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 72; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 73; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 74; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 75; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 76; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 77; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 78; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 79; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 80; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 81; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 82; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 83; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 84; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 85; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 86; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 87; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 88; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 89; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 90; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 91; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 92; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 93; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 94; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 95; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 96; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 97; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 98; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 99; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 100; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 101; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 102; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 103; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 104; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 105; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 106; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 107; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 108; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 109; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 110; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 111; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 112; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 113; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 114; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 115; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 116; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 117; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 118; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 119; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 120; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 121; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 122; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 123; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 124; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 125; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 126; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 127; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 128; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 129; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 130; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 131; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 132; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 133; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 134; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 135; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 136; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 137; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 138; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 139; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 140; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 141; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 142; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 143; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 144; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 145; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 146; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 147; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 148; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 149; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 150; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 151; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 152; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 153; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 154; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 155; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 156; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 157; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 158; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 159; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 160; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 161; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 162; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 163; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 164; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 165; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 166; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 167; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 168; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 169; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 170; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 171; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 172; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 173; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 174; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 175; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 176; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 177; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 178; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 179; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 180; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 181; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 182; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 183; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 184; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 185; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 186; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 187; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 188; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 189; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 190; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 191; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 192; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 193; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 194; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 195; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 196; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 197; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 198; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { helper(idx); } idx = index + 199; try { ((String)objs[idx]).trim(); } catch (ClassCastException _) { System.out.println(" -- stage 2: collecting a number of uncommon_if deopts -- "); stage = 2; } } if (stage == 2) { iteration = (iteration < max_index) ? iteration + 1 : 0; if (data1[iteration] == (char)1) { data1[iteration] = (char)2; return ; } if (data1[iteration] == (char)2) { data1[iteration] = (char)3; return ; } if (data1[iteration] == (char)3) { data1[iteration] = (char)4; return ; } if (data1[iteration] == (char)4) { data1[iteration] = (char)5; return ; } if (data1[iteration] == (char)5) { data1[iteration] = (char)6; return ; } if (data1[iteration] == (char)6) { data1[iteration] = (char)7; return ; } if (data1[iteration] == (char)7) { data1[iteration] = (char)8; return ; } if (data1[iteration] == (char)8) { System.out.println(" -- stage 3: deopts without recompilations? -- "); stage = 3; } } if (stage == 3) { // do nothing. compiled code should be really fast (~1ns/op) dummy = true; } } }