Remi, you were right. Disabling tiered compilation sped things up a bit.
But, everything except MethodHandles is slower in JDK 8 than in JDK 7u7.
Especially static and virtual calls (!!)
*JDK 7u7* vs *JDK 8-ea-bin-b59-windows-x64-04_oct_2012* on Win 7, 64bit, 1
cpu x 2 core x 4 HT, i7 920 laptop:
*JDK 8-ea-b59:*
0% Scenario{vm=java, trial=0, benchmark=Reflect, tune=-server -Xmx96M
-Xmx96M, tier=-XX:+TieredCompilation} 19.35 ns; ?=0.14 ns @ 3 trials
10% Scenario{vm=java, trial=0, benchmark=Handle, tune=-server -Xmx96M
-Xmx96M, tier=-XX:+TieredCompilation} 15.93 ns; ?=0.07 ns @ 3 trials
20% Scenario{vm=java, trial=0, benchmark=Direct, tune=-server -Xmx96M
-Xmx96M, tier=-XX:+TieredCompilation} 7.26 ns; ?=0.03 ns @ 3 trials
30% Scenario{vm=java, trial=0, benchmark=Iface, tune=-server -Xmx96M
-Xmx96M, tier=-XX:+TieredCompilation} 7.24 ns; ?=0.00 ns @ 3 trials
40% Scenario{vm=java, trial=0, benchmark=Static, tune=-server -Xmx96M
-Xmx96M, tier=-XX:+TieredCompilation} 7.18 ns; ?=0.02 ns @ 3 trials
50% Scenario{vm=java, trial=0, benchmark=Reflect, tune=-server -Xmx96M
-Xmx96M, tier=-XX:-TieredCompilation} 18.51 ns; ?=0.10 ns @ 3 trials
60% Scenario{vm=java, trial=0, benchmark=Handle, tune=-server -Xmx96M
-Xmx96M, tier=-XX:-TieredCompilation} 15.75 ns; ?=0.06 ns @ 3 trials
70% Scenario{vm=java, trial=0, benchmark=Direct, tune=-server -Xmx96M
-Xmx96M, tier=-XX:-TieredCompilation} 7.23 ns; ?=0.02 ns @ 3 trials
80% Scenario{vm=java, trial=0, benchmark=Iface, tune=-server -Xmx96M
-Xmx96M, tier=-XX:-TieredCompilation} 7.12 ns; ?=0.03 ns @ 3 trials
90% Scenario{vm=java, trial=0, benchmark=Static, tune=-server -Xmx96M
-Xmx96M, tier=-XX:-TieredCompilation} 7.20 ns; ?=0.06 ns @ 3 trials
benchmark tier ns linear runtime
Reflect -XX:+TieredCompilation 19.35 ==============================
Reflect -XX:-TieredCompilation 18.51 ============================
Handle -XX:+TieredCompilation 15.93 ========================
Handle -XX:-TieredCompilation 15.75 ========================
Direct -XX:+TieredCompilation 7.26 ===========
Direct -XX:-TieredCompilation 7.23 ===========
Iface -XX:+TieredCompilation 7.24 ===========
Iface -XX:-TieredCompilation 7.12 ===========
Static -XX:+TieredCompilation 7.18 ===========
Static -XX:-TieredCompilation 7.20 ===========
vm: java
trial: 0
tune: -server -Xmx96M -Xmx96M
*JDK 7u7:*
0% Scenario{vm=java, trial=0, benchmark=Reflect, tune=-server -Xmx96M
-Xmx96M, tier=-XX:+TieredCompilation} 16.21 ns; ?=0.16 ns @ 10 trials
10% Scenario{vm=java, trial=0, benchmark=Handle, tune=-server -Xmx96M
-Xmx96M, tier=-XX:+TieredCompilation} 20.40 ns; ?=0.17 ns @ 3 trials
20% Scenario{vm=java, trial=0, benchmark=Direct, tune=-server -Xmx96M
-Xmx96M, tier=-XX:+TieredCompilation} 4.80 ns; ?=0.04 ns @ 3 trials
30% Scenario{vm=java, trial=0, benchmark=Iface, tune=-server -Xmx96M
-Xmx96M, tier=-XX:+TieredCompilation} 4.92 ns; ?=0.03 ns @ 3 trials
40% Scenario{vm=java, trial=0, benchmark=Static, tune=-server -Xmx96M
-Xmx96M, tier=-XX:+TieredCompilation} 4.85 ns; ?=0.02 ns @ 3 trials
50% Scenario{vm=java, trial=0, benchmark=Reflect, tune=-server -Xmx96M
-Xmx96M, tier=-XX:-TieredCompilation} 17.32 ns; ?=1.33 ns @ 10 trials
60% Scenario{vm=java, trial=0, benchmark=Handle, tune=-server -Xmx96M
-Xmx96M, tier=-XX:-TieredCompilation} 20.44 ns; ?=0.54 ns @ 10 trials
70% Scenario{vm=java, trial=0, benchmark=Direct, tune=-server -Xmx96M
-Xmx96M, tier=-XX:-TieredCompilation} 4.86 ns; ?=0.10 ns @ 10 trials
80% Scenario{vm=java, trial=0, benchmark=Iface, tune=-server -Xmx96M
-Xmx96M, tier=-XX:-TieredCompilation} 4.84 ns; ?=0.01 ns @ 3 trials
90% Scenario{vm=java, trial=0, benchmark=Static, tune=-server -Xmx96M
-Xmx96M, tier=-XX:-TieredCompilation} 4.81 ns; ?=0.03 ns @ 3 trials
benchmark tier ns linear runtime
Reflect -XX:+TieredCompilation 16.21 =======================
Reflect -XX:-TieredCompilation 17.32 =========================
Handle -XX:+TieredCompilation 20.40 =============================
Handle -XX:-TieredCompilation 20.44 ==============================
Direct -XX:+TieredCompilation 4.80 =======
Direct -XX:-TieredCompilation 4.86 =======
Iface -XX:+TieredCompilation 4.92 =======
Iface -XX:-TieredCompilation 4.84 =======
Static -XX:+TieredCompilation 4.85 =======
Static -XX:-TieredCompilation 4.81 =======
vm: java
trial: 0
tune: -server -Xmx96M -Xmx96M
Regards,
Ashwin.
_______________________________________________
mlvm-dev mailing list
mlvm-dev@openjdk.java.net
http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev
