GCC -O2 Regression

Intel Xeon Silver 4216 testing with a TYAN S7100AG2NR (V4.02 BIOS) and ASPEED on Debian 10 via the Phoronix Test Suite.

Compare your own system(s) to this result file with the Phoronix Test Suite by running the command: phoronix-test-suite benchmark 2007271-NE-GCCO2REGR41
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GCC 11.0.0 20200727
July 27 2020
  4 Minutes
GCC 10.2.0
July 27 2020
  3 Minutes
GCC 9.3.0
July 27 2020
  3 Minutes
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GCC 11.0.0 20200727

Processor: Intel Xeon Silver 4216 @ 3.20GHz (16 Cores / 32 Threads), Motherboard: TYAN S7100AG2NR (V4.02 BIOS), Chipset: Intel Sky Lake-E DMI3 Registers, Memory: 24GB, Disk: 240GB Corsair Force MP500, Graphics: ASPEED, Audio: Realtek ALC892, Network: 2 x Intel I350

OS: Debian 10, Kernel: 4.19.0-9-amd64 (x86_64), Desktop: GNOME Shell 3.30.2, Display Server: X Server, Compiler: GCC 11.0.0 20200727, File-System: ext4, Screen Resolution: 1024x768

Environment Notes: CXXFLAGS=-O2 CFLAGS=-O2
Compiler Notes: --disable-multilib --enable-checking=release
Processor Notes: Scaling Governor: intel_pstate powersave - CPU Microcode: 0x500002c
Security Notes: itlb_multihit: KVM: Mitigation of Split huge pages + l1tf: Not affected + mds: Not affected + meltdown: Not affected + spec_store_bypass: Mitigation of SSB disabled via prctl and seccomp + spectre_v1: Mitigation of usercopy/swapgs barriers and __user pointer sanitization + spectre_v2: Mitigation of Enhanced IBRS IBPB: conditional RSB filling + srbds: Not affected + tsx_async_abort: Mitigation of TSX disabled

GCC 10.2.0

OS: Debian 10, Kernel: 4.19.0-9-amd64 (x86_64), Desktop: GNOME Shell 3.30.2, Display Server: X Server, Compiler: GCC 10.2.0, File-System: ext4, Screen Resolution: 1024x768

GCC 9.3.0

OS: Debian 10, Kernel: 4.19.0-9-amd64 (x86_64), Desktop: GNOME Shell 3.30.2, Display Server: X Server, Compiler: GCC 9.3.0, File-System: ext4, Screen Resolution: 1024x768

GCC -O2 RegressionOpenBenchmarking.orgPhoronix Test SuiteIntel Xeon Silver 4216 @ 3.20GHz (16 Cores / 32 Threads)TYAN S7100AG2NR (V4.02 BIOS)Intel Sky Lake-E DMI3 Registers24GB240GB Corsair Force MP500ASPEEDRealtek ALC8922 x Intel I350Debian 104.19.0-9-amd64 (x86_64)GNOME Shell 3.30.2X ServerGCC 11.0.0 20200727GCC 10.2.0GCC 9.3.0ext41024x768ProcessorMotherboardChipsetMemoryDiskGraphicsAudioNetworkOSKernelDesktopDisplay ServerCompilersFile-SystemScreen ResolutionGCC -O2 Regression BenchmarksSystem Logs- CXXFLAGS=-O2 CFLAGS=-O2- --disable-multilib --enable-checking=release- Scaling Governor: intel_pstate powersave - CPU Microcode: 0x500002c- itlb_multihit: KVM: Mitigation of Split huge pages + l1tf: Not affected + mds: Not affected + meltdown: Not affected + spec_store_bypass: Mitigation of SSB disabled via prctl and seccomp + spectre_v1: Mitigation of usercopy/swapgs barriers and __user pointer sanitization + spectre_v2: Mitigation of Enhanced IBRS IBPB: conditional RSB filling + srbds: Not affected + tsx_async_abort: Mitigation of TSX disabled

GCC 11.0.0 20200727GCC 10.2.0GCC 9.3.0Result OverviewPhoronix Test Suite100%108%116%124%132%SciMarkSciMarkSciMarkCoremarkS.M.MCompositeD.L.M.FCoreMark Size 666 - I.P.S

GCC -O2 Regressionscimark2: Compositescimark2: Sparse Matrix Multiplyscimark2: Dense LU Matrix Factorizationcoremark: CoreMark Size 666 - Iterations Per SecondGCC 11.0.0 20200727GCC 10.2.0GCC 9.3.01467.192278.142985.83413969.5486971404.911977.322981.53440038.2007381585.122607.123251.71445965.550606OpenBenchmarking.org

SciMark

This test runs the ANSI C version of SciMark 2.0, which is a benchmark for scientific and numerical computing developed by programmers at the National Institute of Standards and Technology. This test is made up of Fast Foruier Transform, Jacobi Successive Over-relaxation, Monte Carlo, Sparse Matrix Multiply, and dense LU matrix factorization benchmarks. Learn more via the OpenBenchmarking.org test page.

OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: CompositeGCC 11.0.0 20200727GCC 10.2.0GCC 9.3.030060090012001500SE +/- 0.76, N = 3SE +/- 0.23, N = 3SE +/- 3.10, N = 31467.191404.911585.121. (CC) gcc options: -O2 -lm
OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: CompositeGCC 11.0.0 20200727GCC 10.2.0GCC 9.3.030060090012001500Min: 1465.69 / Avg: 1467.19 / Max: 1468.08Min: 1404.48 / Avg: 1404.91 / Max: 1405.29Min: 1578.94 / Avg: 1585.12 / Max: 1588.661. (CC) gcc options: -O2 -lm

OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: Sparse Matrix MultiplyGCC 11.0.0 20200727GCC 10.2.0GCC 9.3.06001200180024003000SE +/- 0.22, N = 3SE +/- 0.70, N = 3SE +/- 3.22, N = 32278.141977.322607.121. (CC) gcc options: -O2 -lm
OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: Sparse Matrix MultiplyGCC 11.0.0 20200727GCC 10.2.0GCC 9.3.05001000150020002500Min: 2277.86 / Avg: 2278.14 / Max: 2278.57Min: 1976.19 / Avg: 1977.32 / Max: 1978.59Min: 2600.72 / Avg: 2607.12 / Max: 2611.011. (CC) gcc options: -O2 -lm

OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: Dense LU Matrix FactorizationGCC 11.0.0 20200727GCC 10.2.0GCC 9.3.07001400210028003500SE +/- 3.25, N = 3SE +/- 0.12, N = 3SE +/- 6.37, N = 32985.832981.533251.711. (CC) gcc options: -O2 -lm
OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: Dense LU Matrix FactorizationGCC 11.0.0 20200727GCC 10.2.0GCC 9.3.06001200180024003000Min: 2979.4 / Avg: 2985.83 / Max: 2989.89Min: 2981.29 / Avg: 2981.53 / Max: 2981.68Min: 3239.46 / Avg: 3251.71 / Max: 3260.861. (CC) gcc options: -O2 -lm

Coremark

This is a test of EEMBC CoreMark processor benchmark. Learn more via the OpenBenchmarking.org test page.

OpenBenchmarking.orgIterations/Sec, More Is BetterCoremark 1.0CoreMark Size 666 - Iterations Per SecondGCC 11.0.0 20200727GCC 10.2.0GCC 9.3.0100K200K300K400K500KSE +/- 2874.84, N = 3SE +/- 3482.62, N = 3SE +/- 179.10, N = 3413969.55440038.20445965.551. (CC) gcc options: -O2 -lrt" -lrt
OpenBenchmarking.orgIterations/Sec, More Is BetterCoremark 1.0CoreMark Size 666 - Iterations Per SecondGCC 11.0.0 20200727GCC 10.2.0GCC 9.3.080K160K240K320K400KMin: 410800.63 / Avg: 413969.55 / Max: 419708.83Min: 436185.2 / Avg: 440038.2 / Max: 446989.8Min: 445620.39 / Avg: 445965.55 / Max: 446221.071. (CC) gcc options: -O2 -lrt" -lrt

GCC 11.0.0 20200727

Processor: Intel Xeon Silver 4216 @ 3.20GHz (16 Cores / 32 Threads), Motherboard: TYAN S7100AG2NR (V4.02 BIOS), Chipset: Intel Sky Lake-E DMI3 Registers, Memory: 24GB, Disk: 240GB Corsair Force MP500, Graphics: ASPEED, Audio: Realtek ALC892, Network: 2 x Intel I350

OS: Debian 10, Kernel: 4.19.0-9-amd64 (x86_64), Desktop: GNOME Shell 3.30.2, Display Server: X Server, Compiler: GCC 11.0.0 20200727, File-System: ext4, Screen Resolution: 1024x768

Environment Notes: CXXFLAGS=-O2 CFLAGS=-O2
Compiler Notes: --disable-multilib --enable-checking=release
Processor Notes: Scaling Governor: intel_pstate powersave - CPU Microcode: 0x500002c
Security Notes: itlb_multihit: KVM: Mitigation of Split huge pages + l1tf: Not affected + mds: Not affected + meltdown: Not affected + spec_store_bypass: Mitigation of SSB disabled via prctl and seccomp + spectre_v1: Mitigation of usercopy/swapgs barriers and __user pointer sanitization + spectre_v2: Mitigation of Enhanced IBRS IBPB: conditional RSB filling + srbds: Not affected + tsx_async_abort: Mitigation of TSX disabled

Testing initiated at 27 July 2020 12:32 by user phoronix.

GCC 10.2.0

Processor: Intel Xeon Silver 4216 @ 3.20GHz (16 Cores / 32 Threads), Motherboard: TYAN S7100AG2NR (V4.02 BIOS), Chipset: Intel Sky Lake-E DMI3 Registers, Memory: 24GB, Disk: 240GB Corsair Force MP500, Graphics: ASPEED, Audio: Realtek ALC892, Network: 2 x Intel I350

OS: Debian 10, Kernel: 4.19.0-9-amd64 (x86_64), Desktop: GNOME Shell 3.30.2, Display Server: X Server, Compiler: GCC 10.2.0, File-System: ext4, Screen Resolution: 1024x768

Environment Notes: CXXFLAGS=-O2 CFLAGS=-O2
Compiler Notes: --disable-multilib --enable-checking=release
Processor Notes: Scaling Governor: intel_pstate powersave - CPU Microcode: 0x500002c
Security Notes: itlb_multihit: KVM: Mitigation of Split huge pages + l1tf: Not affected + mds: Not affected + meltdown: Not affected + spec_store_bypass: Mitigation of SSB disabled via prctl and seccomp + spectre_v1: Mitigation of usercopy/swapgs barriers and __user pointer sanitization + spectre_v2: Mitigation of Enhanced IBRS IBPB: conditional RSB filling + srbds: Not affected + tsx_async_abort: Mitigation of TSX disabled

Testing initiated at 27 July 2020 13:34 by user phoronix.

GCC 9.3.0

Processor: Intel Xeon Silver 4216 @ 3.20GHz (16 Cores / 32 Threads), Motherboard: TYAN S7100AG2NR (V4.02 BIOS), Chipset: Intel Sky Lake-E DMI3 Registers, Memory: 24GB, Disk: 240GB Corsair Force MP500, Graphics: ASPEED, Audio: Realtek ALC892, Network: 2 x Intel I350

OS: Debian 10, Kernel: 4.19.0-9-amd64 (x86_64), Desktop: GNOME Shell 3.30.2, Display Server: X Server, Compiler: GCC 9.3.0, File-System: ext4, Screen Resolution: 1024x768

Environment Notes: CXXFLAGS=-O2 CFLAGS=-O2
Compiler Notes: --disable-multilib --enable-checking=release
Processor Notes: Scaling Governor: intel_pstate powersave - CPU Microcode: 0x500002c
Security Notes: itlb_multihit: KVM: Mitigation of Split huge pages + l1tf: Not affected + mds: Not affected + meltdown: Not affected + spec_store_bypass: Mitigation of SSB disabled via prctl and seccomp + spectre_v1: Mitigation of usercopy/swapgs barriers and __user pointer sanitization + spectre_v2: Mitigation of Enhanced IBRS IBPB: conditional RSB filling + srbds: Not affected + tsx_async_abort: Mitigation of TSX disabled

Testing initiated at 27 July 2020 14:36 by user phoronix.