Created
May 30, 2017 12:56
-
-
Save primiano/6dbe3929238063f7942f15c5078356d6 to your computer and use it in GitHub Desktop.
Another vector perftest using structs
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| $ sudo cpupower frequency-set -g powersave | |
| $ sudo sh -c "echo 1 > /sys/devices/system/cpu/intel_pstate/no_turbo | |
| $ for cpu in /sys/devices/system/cpu/cpu*; do for p in $(seq 4); do sudo sh -c "echo 1 > $cpu/cpuidle/state$p/disable"; done; do | |
| #################### | |
| # Use emplace_back() | |
| #################### | |
| $ perf stat out/offlnx/ctest | |
| tcmalloc: large alloc 1600000000 bytes == 0x349af33da000 @ | |
| Performance counter stats for 'out/offlnx/ctest': | |
| 1263.947853 task-clock (msec) # 1.000 CPUs utilized | |
| 2 context-switches # 0.002 K/sec | |
| 0 cpu-migrations # 0.000 K/sec | |
| 391,576 page-faults # 0.310 M/sec | |
| 3,530,611,581 cycles # 2.793 GHz | |
| 2,427,142,407 stalled-cycles-frontend # 68.75% frontend cycles idle | |
| <not supported> stalled-cycles-backend | |
| 2,865,689,418 instructions # 0.81 insns per cycle | |
| # 0.85 stalled cycles per insn | |
| 485,486,138 branches # 384.103 M/sec | |
| 303,264 branch-misses # 0.06% of all branches | |
| 1.264433149 seconds time elapsed | |
| ############################# | |
| # Use resize() + Initialize() | |
| ############################# | |
| $ perf stat out/offlnx/ctest resize_and_initialize | |
| tcmalloc: large alloc 1600000000 bytes == 0xbb728cf9000 @ | |
| Performance counter stats for 'out/offlnx/ctest resize_and_initialize': | |
| 1059.725647 task-clock (msec) # 0.999 CPUs utilized | |
| 2 context-switches # 0.002 K/sec | |
| 0 cpu-migrations # 0.000 K/sec | |
| 391,579 page-faults # 0.370 M/sec | |
| 2,899,437,341 cycles # 2.736 GHz | |
| 2,049,645,275 stalled-cycles-frontend # 70.69% frontend cycles idle | |
| <not supported> stalled-cycles-backend | |
| 1,960,389,095 instructions # 0.68 insns per cycle | |
| # 1.05 stalled cycles per insn | |
| 233,498,344 branches # 220.338 M/sec | |
| 278,474 branch-misses # 0.12% of all branches | |
| 1.060391691 seconds time elapsed |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #include <stdio.h> | |
| #include <vector> | |
| #include "base/strings/string_number_conversions.h" | |
| const int N = 100000000; | |
| struct X { | |
| X() {} | |
| explicit X(int n) : x(n), y(n+1), w(n+2), h(n+3) {} | |
| void Initialize(int n) { x = n; y = n + 1; w = n + 2; h = n + 3; } | |
| int x; | |
| int y; | |
| int w; | |
| int h; | |
| }; | |
| int main(int argc, char** argv) { | |
| std::vector<X> v1; | |
| if (argc == 1) { | |
| v1.reserve(N); | |
| for (int i = 0; i < N; i++) | |
| v1.emplace_back(i); | |
| } else { | |
| v1.resize(N); | |
| for (int i = 0; i < N; i++) | |
| v1[i].Init(i); | |
| } | |
| return v1.size(); | |
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| $ cat out/offlnx/args.gn | |
| is_component_build = false | |
| is_debug = false | |
| symbol_level=2 | |
| is_official_build = true | |
| enable_nacl = false | |
| allow_posix_link_time_opt = false |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| ../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF obj/ctest/ctest.o.d -DV8_DEPRECATION_WARNINGS -DUSE_UDEV -DUSE_AURA=1 -DUSE_PANGO=1 -DUSE_CAIRO=1 -DUSE_GLIB=1 -DUSE_NSS_CERTS=1 -DUSE_X11=1 -DDISABLE_NACL -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DOFFICIAL_BUILD -DCHROMIUM_BUILD -DFIELDTRIAL_TESTING_ENABLED -DCR_CLANG_REVISION=\"303910-1\" -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D_FORTIFY_SOURCE=2 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_32 -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_26 -I../.. -Igen -I../../build/linux/debian_jessie_amd64-sysroot/usr/include/glib-2.0 -I../../build/linux/debian_jessie_amd64-sysroot/usr/lib/x86_64-linux-gnu/glib-2.0/include -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -funwind-tables -fPIC -pipe -B../../third_party/binutils/Linux_x64/Release/bin -fcolor-diagnostics -m64 -march=x86-64 -pthread -Wall -Werror -Wextra -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-unneeded-internal-declaration -Wno-inconsistent-missing-override -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-address-of-packed-member -Wno-unused-lambda-capture -Wno-user-defined-warnings -O2 -fno-ident -fdata-sections -ffunction-sections -fomit-frame-pointer -g2 --sysroot=../../build/linux/debian_jessie_amd64-sysroot -fvisibility=hidden -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.so -Xclang -add-plugin -Xclang find-bad-constructs -Xclang -plugin-arg-find-bad-constructs -Xclang check-auto-raw-pointer -Xclang -plugin-arg-find-bad-constructs -Xclang check-ipc -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -std=gnu++11 -fno-rtti -fno-exceptions -fvisibility-inlines-hidden -c ../../ctest.cc -o obj/ctest/ctest.o | |
| Raw |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment