| CPU2006 license: | 11 | Test date: | Apr-2015 |
|---|---|---|---|
| Test sponsor: | IBM Corporation | Hardware Availability: | Jun-2015 |
| Tested by: | IBM Corporation | Software Availability: | Mar-2015 |
| Hardware | |
|---|---|
| CPU Name: | POWER8 |
| CPU Characteristics: | Intelligent Energy Optimization enabled, up to 4.256 GHz |
| CPU MHz: | 4000 |
| FPU: | Integrated |
| CPU(s) enabled: | 192 cores, 16 chips, 12 cores/chip, 8 threads/core |
| CPU(s) orderable: | 4,8,12,16 Modules |
| Primary Cache: | 32 KB I + 64 KB D on chip per core |
| Secondary Cache: | 512 KB I+D on chip per core |
| L3 Cache: | 8 MB I+D on chip per core |
| Other Cache: | 16 MB I+D off chip per CDIMM |
| Memory: | 4 TB (128 x 32 GB CDIMMs) DDR3 1600 MHz |
| Disk Subsystem: | 16 x 300 GB 15K RPM SAS SFF-2 Raid5 |
| Other Hardware: | None |
| Software | |
|---|---|
| Operating System: | Red Hat Enterprise Linux Server release 7.1 (ppc64) kernel <3.10.0-229.1.2.el7.ppc64> |
| Compiler: | C/C++: Version 13.1 of IBM XL C/C++ for Linux |
| Auto Parallel: | No |
| File System: | xfs |
| System State: | Run level 3 (multi-user) |
| Base Pointers: | 32-bit |
| Peak Pointers: | 32/64-bit |
| Other Software: | Post-Link Optimization for Linux on POWER, version 5.6.2 IBM Advance Toolchain 7.0-3 |
Results Table
| Benchmark | Base | Peak | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Copies | Seconds | Ratio | Seconds | Ratio | Seconds | Ratio | Copies | Seconds | Ratio | Seconds | Ratio | Seconds | Ratio | |
| Results appear in the order in which they were run. Bold underlined text indicates a median measurement. | ||||||||||||||
| 400.perlbench | 768 | 1116 | 6720 | 1009 | 7440 | 1029 | 7290 | 768 | 974 | 7700 | 941 | 7970 | 947 | 7930 |
| 401.bzip2 | 768 | 982 | 7550 | 898 | 8250 | 888 | 8350 | 1152 | 1304 | 8530 | 1189 | 9350 | 1190 | 9340 |
| 403.gcc | 768 | 616 | 10000 | 610 | 10100 | 609 | 10100 | 1344 | 922 | 11700 | 920 | 11800 | 904 | 12000 |
| 429.mcf | 768 | 379 | 18500 | 378 | 18500 | 380 | 18400 | 960 | 430 | 20300 | 429 | 20400 | 429 | 20400 |
| 445.gobmk | 768 | 817 | 9860 | 813 | 9910 | 790 | 10200 | 1536 | 1358 | 11900 | 1355 | 11900 | 1353 | 11900 |
| 456.hmmer | 768 | 712 | 10100 | 710 | 10100 | 708 | 10100 | 768 | 390 | 18400 | 392 | 18300 | 389 | 18400 |
| 458.sjeng | 768 | 958 | 9700 | 941 | 9870 | 953 | 9750 | 1536 | 1820 | 10200 | 1819 | 10200 | 1817 | 10200 |
| 462.libquantum | 768 | 742 | 21400 | 739 | 21500 | 738 | 21600 | 768 | 158 | 101000 | 149 | 107000 | 148 | 108000 |
| 464.h264ref | 768 | 1041 | 16300 | 1038 | 16400 | 1040 | 16400 | 768 | 998 | 17000 | 993 | 17100 | 997 | 17100 |
| 471.omnetpp | 768 | 644 | 7450 | 641 | 7490 | 642 | 7470 | 1344 | 1063 | 7900 | 1056 | 7950 | 1055 | 7960 |
| 473.astar | 768 | 561 | 9600 | 562 | 9590 | 566 | 9530 | 1152 | 815 | 9920 | 812 | 9960 | 812 | 9960 |
| 483.xalancbmk | 768 | 421 | 12600 | 405 | 13100 | 406 | 13000 | 1152 | 576 | 13800 | 576 | 13800 | 574 | 13800 |
Peak Tuning Notes
400.perlbench fdpr options: -O4 -m power8 -A 2 -rcl 2 -sls -dir -vrox 401.bzip2 fdpr options: -O4 -m power8 -A 2 -rcl 2 -sls -dir -vrox 403.gcc fdpr options: -O4 -m power8 -A 2 -sls -dir -vrox 429.mcf fdpr options: -O4 -m power8 -A 2 -rcl 2 -sls -dir -vrox 456.hmmer fdpr options: -O4 -m power8 -A 2 -rcl 2 -sls -dir -vrox 458.sjeng fdpr options: -O4 -m power8 -A 2 -rcl 2 -sls -dir -vrox 462.libquantum fdpr options: -O4 -m power8 -A 2 -rcl 2 -sls -dir -vrox 464.h264ref fdpr options: -O4 -m power8 -A 2 -rcl 2 -sls -dir -vrox 471.omnetpp fdpr options: -O4 -m power8 -A 2 -rcl 2 -sls -dir -vrox 473.astar fdpr options: -O4 -m power8 -A 2 -rcl 2 -sls -dir -vrox 483.xalancbmk fdpr options: -O4 -m power8 -A 2 -rcl 2 -sls -dir -vrox
Submit Notes
The config file option 'submit' was used to assign benchmark copy to specific kernel thread using the "numactl" command (see flags file for details).
Operating System Notes
ulimit -s (stack) set to unlimited 59520 16M large pages defined with echo 59520 > /proc/sys/vm/nr_hugepages echo 115200 > /proc/sys/vm/nr_overcommit_hugepages Transparent huge page enabled with echo always > /sys/kernel/mm/transparent_hugepage/enabled
General Notes
Environment variables set by runspec before the start of the run: HUGETLB_MORECORE = "yes" HUGETLB_VERBOSE = "0" TCMALLOC_MEMFS_MALLOC_PATH = "/dev/hugepages/" XLFRTEOPTS = "intrinthds=1" This result uses the post_setup and/or bench_post_setup to drop caches. SPEC has determined that although the effect may have been negligible for this run, future submissions will not be considered rule compliant if the post_setup actions drop caches (e.g. : "echo 3 > /proc/sys/vm/drop_caches").
Base Compiler Invocation
C benchmarks:
| /opt/ibm/xlC/13.1.0/bin/xlc_at -qlanglvl=extc99 |
C++ benchmarks:
| /opt/ibm/xlC/13.1.0/bin/xlC_at |
Base Portability Flags
| 400.perlbench: | -DSPEC_CPU_LINUX_PPC |
| 462.libquantum: | -DSPEC_CPU_LINUX |
| 464.h264ref: | -qchars=signed |
| 483.xalancbmk: | -DSPEC_CPU_LINUX |
Base Optimization Flags
C benchmarks:
| -qinline=40 -qipa=threads -qlargepage -O5 -qalias=noansi -qalloca -lhugetlbfs |
C++ benchmarks:
| -qinline=40 -qipa=threads -qlargepage -O5 -qrtti -ltcmalloc |
Base Other Flags
C benchmarks:
| -qipa=noobject -qsuppress=1500-036 |
C++ benchmarks:
| -qipa=noobject -qsuppress=1500-036 |
Peak Compiler Invocation
C benchmarks:
| /opt/ibm/xlC/13.1.0/bin/xlc_at -qlanglvl=extc99 |
C++ benchmarks:
| /opt/ibm/xlC/13.1.0/bin/xlC_at |
Peak Portability Flags
| 400.perlbench: | -DSPEC_CPU_LINUX_PPC |
| 403.gcc: | -DSPEC_CPU_LP64 |
| 462.libquantum: | -DSPEC_CPU_LINUX |
| 464.h264ref: | -qchars=signed |
| 483.xalancbmk: | -DSPEC_CPU_LINUX |
Peak Optimization Flags
C benchmarks:
C++ benchmarks:
| 471.omnetpp: | -qinline=40 -qipa=threads -qpdf1(pass 1) -qpdf2(pass 2) -O5 -qsimd=noauto -qarch=pwr7 -qtune=pwr7 -qprefetch=dscr=0x54 -qfdpr -qrtti -lhugetlbfs -Wl,-q -ltcmalloc |
| 473.astar: | -qinline=40 -qipa=threads -qpdf1(pass 1) -qpdf2(pass 2) -O5 -qlargepage -qprefetch=dscr=0x93 -qfdpr -lhugetlbfs -Wl,-q -ltcmalloc |
| 483.xalancbmk: | -qinline=40 -qipa=threads -qpdf1(pass 1) -qpdf2(pass 2) -O3 -qarch=auto -qtune=auto -qsimd -qlargepage -qprefetch=dscr=0x93 -qipa=partition=large -qfdpr -lhugetlbfs -Wl,-q -ltcmalloc |
Peak Other Flags
C benchmarks (except as noted below):
| -qsuppress=1586-476(pass 2) -qipa=noobject -qsuppress=1500-036 | |
| 400.perlbench: | -qsuppress=1586-476(pass 2) -qsuppress=1500-036 |
| 456.hmmer: | -qipa=noobject -qsuppress=1500-036 |
C++ benchmarks:
| -qsuppress=1586-476(pass 2) -qipa=noobject -qsuppress=1500-036 |