├── LICENSE ├── README.md ├── blandwidth.c ├── blandwidth.h ├── build.bat ├── win32_blandwidth.c └── x64_blandwidth.c /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Blandwidth r1 2 | Blandwidth is a compact memory bandwidth tester for x64 CPUs running Windows. It was developed during creation of the [Star Code Galaxy](https://starcodegalaxy.com) programming course because publicly available per-core bandwidth measurements seemed scarce. It is difficult to tell students to learn about their processor's per-core memory bandwidth numbers when nobody seems to publish them! 3 | 4 | Blandwidth is designed to determine the sustainable real bandwidth from the processor to L1, L2, L3, and main memory during single thread and multiple thread workloads. It is meant to produce numbers programmers can use to create realistic estimates of how much read, write, or read-write bandwidth their algorithms can expect for each specific processor and number of concurrent threads. 5 | 6 | # Building 7 | 8 | To build Blandwidth, install either Visual Studio or CLANG, cd to the blandwidth directory and run: 9 | 10 | ``` 11 | build.bat 12 | ``` 13 | 14 | Note that Blandwidth on Windows has no prerequisites and no dependencies other than the user32.lib and kernel32.lib import libraries. It does not require a C runtime library of any kind, or any other library. 15 | 16 | If your system supports llvm-mca, the build.bat file will run it and write into the build directory a cycle analysis of the memory routines. This can be useful for ensuring that your version of the C compiler is generating efficient memory test routines. 17 | 18 | # Usage 19 | 20 | To run Blandwidth, run a release executable and pipe the output to the file where measurements should be stored, eg.: 21 | 22 | ``` 23 | build\blandwidth_release_msvc.exe > intel_core_i9_test.csv 24 | ``` 25 | 26 | During testing, it will write summary messages to stderr which you can use to track its progress. Once complete, it will write a CSV to stdout with the statistics gathered for each test. 27 | 28 | # Limitations 29 | 30 | As of r1, Blandwidth does not test CPU core patterns, so it does not properly discover all interesing memory bandwidth differences. As time permits, in future versions it would be nice to use core-locked threads and test different distribution patterns to see which patterns produce the best and worst bandwidth on NUMA architectures. 31 | -------------------------------------------------------------------------------- /blandwidth.c: -------------------------------------------------------------------------------- 1 | /* ======================================================================== 2 | $File: work/tools/blandwidth/blandwidth.c $ 3 | $Date: 2020/06/17 05:05:33 UTC $ 4 | $Revision: 5 $ 5 | $Creator: Casey Muratori $ 6 | ======================================================================== */ 7 | 8 | function u64 9 | Minimum(u64 A, u64 B) 10 | { 11 | u64 Result = (A < B) ? A : B; 12 | return(Result); 13 | } 14 | 15 | function u64 16 | Maximum(u64 A, u64 B) 17 | { 18 | u64 Result = (A > B) ? A : B; 19 | return(Result); 20 | } 21 | 22 | function u64 23 | RoundedDiv(u64 A, u64 B) 24 | { 25 | u64 Result = A; 26 | if(B) 27 | { 28 | Result = (A + B/2) / B; 29 | } 30 | 31 | return(Result); 32 | } 33 | 34 | function void 35 | NoOp(memory_operation *Op) 36 | { 37 | (void)(Op); 38 | } 39 | 40 | function void * 41 | AllocateAndFill(u64 Size) 42 | { 43 | u8 *Result = (u8 *)AllocateAndClear(Size); 44 | for(u64 ValueIndex = 0; 45 | ValueIndex < Size; 46 | ++ValueIndex) 47 | { 48 | Result[ValueIndex] = (255 - (u8)ValueIndex); 49 | } 50 | 51 | return(Result); 52 | } 53 | 54 | function time 55 | Subtract(time A, time B) 56 | { 57 | time Result; 58 | 59 | Result.Clock = A.Clock - B.Clock; 60 | Result.Counter = A.Counter - B.Counter; 61 | 62 | return(Result); 63 | } 64 | 65 | function time 66 | Average(time_stat A) 67 | { 68 | time Result = A.Sum; 69 | 70 | if(A.Count) 71 | { 72 | Result.Clock /= A.Count; 73 | Result.Counter /= A.Count; 74 | } 75 | 76 | return(Result); 77 | } 78 | 79 | function void 80 | Include(time_stat *Stat, time T) 81 | { 82 | if(Stat->Count) 83 | { 84 | Stat->Min.Clock = Minimum(Stat->Min.Clock, T.Clock); 85 | Stat->Min.Counter = Minimum(Stat->Min.Counter, T.Counter); 86 | Stat->Max.Clock = Maximum(Stat->Max.Clock, T.Clock); 87 | Stat->Max.Counter = Maximum(Stat->Max.Counter, T.Counter); 88 | } 89 | else 90 | { 91 | Stat->Min = T; 92 | Stat->Max = T; 93 | } 94 | 95 | Stat->Sum.Clock += T.Clock; 96 | Stat->Sum.Counter += T.Counter; 97 | ++Stat->Count; 98 | } 99 | 100 | function u64 101 | GetNanoseconds(time BaseHz, u64 A) 102 | { 103 | u64 NSPerS = 1000ULL * 1000 * 1000; 104 | u64 Result = (NSPerS*A)/BaseHz.Counter; 105 | return(Result); 106 | } 107 | 108 | function u64 109 | GetBandwidthAs(time BaseHz, memory_test_results *Res, u64 Unit) 110 | { 111 | u64 Hz = BaseHz.Counter; 112 | u64 Measure = Res->Total.Min.Counter; 113 | 114 | u64 BytesPerSecond = 0; 115 | if(Measure) 116 | { 117 | BytesPerSecond = (Res->TotalSize * Hz) / Measure; 118 | } 119 | 120 | u64 Result = RoundedDiv(BytesPerSecond, Unit); 121 | 122 | return(Result); 123 | } 124 | 125 | function u64 126 | GetBandwidth(time BaseHz, memory_test_results *Res) 127 | { 128 | u64 Result = GetBandwidthAs(BaseHz, Res, 1); 129 | return(Result); 130 | } 131 | 132 | function void 133 | TimeOperation(context *Context, u32 OpCount, memory_operation *Operations, time_stat *ThreadStat, time_stat *TotalStat) 134 | { 135 | u64 MaxCyclesToSpend = (1ULL*1000*1000*1000); 136 | u64 CyclesSpentOnNewMin = 0; 137 | while(CyclesSpentOnNewMin < MaxCyclesToSpend) 138 | { 139 | time Now; 140 | TIME_OPEN(Now); 141 | u64 StartGate = (Now.Counter + Context->BaseHz.Counter)/1000; 142 | for(u32 OpIndex = 0; 143 | OpIndex < OpCount; 144 | ++OpIndex) 145 | { 146 | Operations[OpIndex].StartGateCounter = StartGate; 147 | } 148 | 149 | DispatchWork(Context, OpCount, Operations); 150 | 151 | time_stat ThisRun = {0}; 152 | for(u32 ThreadIndex = 0; 153 | ThreadIndex < OpCount; 154 | ++ThreadIndex) 155 | { 156 | memory_operation *ResultOp = ReceiveWorkResult(Context); 157 | time ThreadTime = Subtract(ResultOp->EndStamp, ResultOp->StartStamp); 158 | Include(ThreadStat, ThreadTime); 159 | Include(&ThisRun, ResultOp->EndStamp); 160 | Include(&ThisRun, ResultOp->StartStamp); 161 | } 162 | 163 | time TotalTime = Subtract(ThisRun.Max, ThisRun.Min); 164 | CyclesSpentOnNewMin += TotalTime.Clock; 165 | 166 | time PrevMin = TotalStat->Min; 167 | Include(TotalStat, TotalTime); 168 | if((TotalStat->Min.Clock != PrevMin.Clock) || 169 | (TotalStat->Min.Counter != PrevMin.Counter)) 170 | { 171 | // NOTE(casey): Every time we see a new minimum clock or counter, restart the testing 172 | CyclesSpentOnNewMin = 0; 173 | } 174 | } 175 | } 176 | 177 | function void 178 | Main(context *Context) 179 | { 180 | u64 Megabyte = 1024*1024; 181 | u64 Gigabyte = 1024*Megabyte; 182 | u64 Million = 1000*1000; 183 | 184 | // 185 | // NOTE(casey): Print the informational header 186 | // 187 | 188 | Statusf("\n"); 189 | Statusf("========================================================================\n"); 190 | Statusf("BlandWidth " VERSION_STRING " - A compact bandwidth tester for x64 CPUs\n"); 191 | Statusf("by Casey Muratori circa 2020\n"); 192 | Statusf("========================================================================\n"); 193 | Statusf("\n"); 194 | Statusf("WARNING: USE AT YOUR OWN RISK. Numbers reported by this utility reflect\n"); 195 | Statusf("the interplay of cores, clocking, hyperthreading, buffers, caches, and\n"); 196 | Statusf("memory. Considerable expertise is required to interpret them properly.\n"); 197 | Statusf("\n"); 198 | 199 | Statusf("CPU: %s\n", Context->CPUBrand); 200 | Statusf("Logical Cores: %u\n", Context->LogicalCoreCount); 201 | Statusf("Expected frequency: %Iumhz\n", RoundedDiv(Context->BaseHz.Clock, Million)); 202 | Statusf("Support: "); 203 | for(u32 HandlerIndex = 0; 204 | HandlerIndex < Context->HandlerCount; 205 | ++HandlerIndex) 206 | { 207 | Statusf(" %s", Context->Handlers[HandlerIndex].Name); 208 | } 209 | Statusf("\n\n"); 210 | 211 | // 212 | // NOTE(casey): Prepare test buffers 213 | // 214 | 215 | memory_operation *Operations = (memory_operation *)AllocateAndClear(Context->MaxThreadCount*SizeOf(memory_operation)); 216 | 217 | u64 BankSize = 4ULL*Gigabyte; 218 | u8 *Bank[2]; 219 | Bank[0] = (u8 *)AllocateAndFill(BankSize); 220 | Bank[1] = (u8 *)AllocateAndFill(BankSize); 221 | 222 | u64 BankPerThread = BankSize / Context->MaxThreadCount; 223 | 224 | u32 ValuesSize = Context->MaxThreadCount*BLOCK_SIZE; 225 | u8 *ValuesBuffer = (u8 *)AllocateAndFill(ValuesSize); 226 | 227 | // 228 | // NOTE(casey): Run tests 229 | // 230 | 231 | u32 SizeOffset = 14; 232 | u32 SizeCount = 14; 233 | u32 MinThreadCount = 1; 234 | u32 ResultsPerTest = Context->HandlerCount*(Context->MaxThreadCount - MinThreadCount + 1); 235 | u32 ResultCount = SizeCount*ResultsPerTest; 236 | memory_test_results *TestResults = (memory_test_results *)AllocateAndClear(ResultCount*SizeOf(memory_test_results)); 237 | 238 | u32 SourceBankIndex = 0; 239 | u32 DestBankIndex = 0; 240 | 241 | u32 ResultIndex = 0; 242 | for(u32 HandlerIndex = 0; 243 | HandlerIndex < Context->HandlerCount; 244 | ++HandlerIndex) 245 | { 246 | for(u32 SizeIndex = 0; 247 | SizeIndex < SizeCount; 248 | ++SizeIndex) 249 | { 250 | u64 TotalRegionSize = (1ULL << (SizeOffset + SizeIndex)); 251 | u64 TotalRegionMask = (TotalRegionSize - 1); 252 | 253 | u32 FirstResultIndex = ResultIndex; 254 | memory_test_results *Fastest = TestResults + FirstResultIndex; 255 | memory_test_results *Slowest = TestResults + FirstResultIndex; 256 | for(u32 ThreadCount = MinThreadCount; 257 | ThreadCount <= Context->MaxThreadCount; 258 | ++ThreadCount) 259 | { 260 | memory_test_results *Results = TestResults + ResultIndex++; 261 | Results->ThreadCount = ThreadCount; 262 | Results->HandlerIndex = HandlerIndex; 263 | 264 | char *PrintSizeTable[] = {"b", "kb", "mb", "gb", 0}; 265 | u32 PrintSizePower = 0; 266 | u64 PrintSize = TotalRegionSize; 267 | while(PrintSizeTable[PrintSizePower + 1] && (PrintSize > 1024)) 268 | { 269 | PrintSize /= 1024; 270 | ++PrintSizePower; 271 | } 272 | 273 | wsprintf(Results->Name, "%s %Iu%s/%ut", Context->Handlers[HandlerIndex].Name, PrintSize, PrintSizeTable[PrintSizePower], ThreadCount); 274 | 275 | Results->TotalSize = 0; 276 | for(u32 ThreadIndex = 0; 277 | ThreadIndex < ThreadCount; 278 | ++ThreadIndex) 279 | { 280 | memory_operation *ThreadOp = Operations + ThreadIndex; 281 | 282 | ThreadOp->Pattern.Source = Bank[SourceBankIndex] + ThreadIndex*BankPerThread; 283 | ThreadOp->Pattern.Dest = Bank[DestBankIndex] + ThreadIndex*BankPerThread; 284 | 285 | ThreadOp->Pattern.SourceStride = BLOCK_SIZE; 286 | ThreadOp->Pattern.SourceMask = TotalRegionMask; 287 | 288 | ThreadOp->Pattern.DestStride = BLOCK_SIZE; 289 | ThreadOp->Pattern.DestMask = TotalRegionMask; 290 | 291 | ThreadOp->Count = (4*TotalRegionSize) / BLOCK_SIZE; 292 | if(ThreadOp->Count < Million) 293 | { 294 | ThreadOp->Count = Million; 295 | } 296 | 297 | ThreadOp->Values = ValuesBuffer + ThreadIndex*BLOCK_SIZE; 298 | 299 | Results->TotalSize += ThreadOp->Count*BLOCK_SIZE; 300 | 301 | ThreadOp->Handler = Context->Handlers[HandlerIndex].Function; 302 | } 303 | 304 | TimeOperation(Context, ThreadCount, Operations, &Results->Thread, &Results->Total); 305 | 306 | if(GetBandwidth(Context->BaseHz, Fastest) < GetBandwidth(Context->BaseHz, Results)) 307 | { 308 | Fastest = Results; 309 | } 310 | 311 | if(GetBandwidth(Context->BaseHz, Slowest) > GetBandwidth(Context->BaseHz, Results)) 312 | { 313 | Slowest = Results; 314 | } 315 | 316 | Statusf("\r%s %IuGB/s (best: %IuGB/s) ", 317 | Results->Name, 318 | GetBandwidthAs(Context->BaseHz, Results, Gigabyte), 319 | GetBandwidthAs(Context->BaseHz, Fastest, Gigabyte)); 320 | } 321 | 322 | Statusf("\rBest: %s %IuGB/s (slowest: %ut - %IuGB/s)\n", 323 | Fastest->Name, GetBandwidthAs(Context->BaseHz, Fastest, Gigabyte), 324 | Slowest->ThreadCount, GetBandwidthAs(Context->BaseHz, Slowest, Gigabyte)); 325 | } 326 | } 327 | 328 | Statusf("\n\n"); 329 | 330 | Dataf("Test,Estimated MB/s,Threads,Handler Index,Size,Min Total ns,Max Total ns,Avg Total ns,Min Total Clocks,Max Total Clocks,Avg Total Clocks,Min Thread ns,Max Thread ns,Avg Thread ns,Min Thread Clocks,Max Thread Clocks,Avg Thread Clocks\n"); 331 | for(ResultIndex = 0; 332 | ResultIndex < ResultCount; 333 | ++ResultIndex) 334 | { 335 | memory_test_results *Result = TestResults + ResultIndex; 336 | if(Result->Total.Count) 337 | { 338 | time TotalAvg = Average(Result->Total); 339 | time ThreadAvg = Average(Result->Thread); 340 | 341 | u64 MinTotalNS = GetNanoseconds(Context->BaseHz, Result->Total.Min.Counter); 342 | u64 MaxTotalNS = GetNanoseconds(Context->BaseHz, Result->Total.Max.Counter); 343 | u64 AvgTotalNS = GetNanoseconds(Context->BaseHz, TotalAvg.Counter); 344 | 345 | u64 MinTotalClocks = Result->Total.Min.Clock; 346 | u64 MaxTotalClocks = Result->Total.Max.Clock; 347 | u64 AvgTotalClocks = TotalAvg.Clock; 348 | 349 | u64 MinThreadNS = GetNanoseconds(Context->BaseHz, Result->Thread.Min.Counter); 350 | u64 MaxThreadNS = GetNanoseconds(Context->BaseHz, Result->Thread.Max.Counter); 351 | u64 AvgThreadNS = GetNanoseconds(Context->BaseHz, ThreadAvg.Counter); 352 | 353 | u64 MinThreadClocks = Result->Thread.Min.Clock; 354 | u64 MaxThreadClocks = Result->Thread.Max.Clock; 355 | u64 AvgThreadClocks = ThreadAvg.Clock; 356 | 357 | Dataf("%s,%Iu,%u,%u,%Iu,%Iu,%Iu,%Iu,%Iu,%Iu,%Iu,%Iu,%Iu,%Iu,%Iu,%Iu,%Iu\n", 358 | Result->Name, 359 | GetBandwidthAs(Context->BaseHz, Result, Megabyte), 360 | Result->ThreadCount, 361 | Result->HandlerIndex, 362 | Result->TotalSize, 363 | MinTotalNS, MaxTotalNS, AvgTotalNS, 364 | MinTotalClocks, MaxTotalClocks, AvgTotalClocks, 365 | MinThreadNS, MaxThreadNS, AvgThreadNS, 366 | MinThreadClocks, MaxThreadClocks, AvgThreadClocks); 367 | } 368 | } 369 | } 370 | -------------------------------------------------------------------------------- /blandwidth.h: -------------------------------------------------------------------------------- 1 | /* ======================================================================== 2 | $File: work/tools/blandwidth/blandwidth.h $ 3 | $Date: 2020/06/17 05:03:59 UTC $ 4 | $Revision: 4 $ 5 | $Creator: Casey Muratori $ 6 | ======================================================================== */ 7 | 8 | /* TODO(casey): 9 | 10 | Currently, there are few things missing that are important for gaining 11 | insight into how different x64 architectures supply bandwidth. Future 12 | versions of Blandwidth should add: 13 | 14 | 1) Logical core affinity and scattered test patterns to measure the 15 | difference between cores as well as the differences when a core 16 | has two hyperthreads vs. one. 17 | 18 | 2) Reading out of small buffers but writing into large ones, and 19 | reading out of large buffers but writing into small ones, since 20 | these patterns may change the behavior. 21 | 22 | 3) Randomized read/write offsets, to measure the bandwidth when the 23 | CPU cannot predict the next offset. 24 | 25 | 4) Reading and writing the same buffer, instead of reading from 26 | one buffer and writing to another. 27 | 28 | In addition, there are some general quality problems that I expect could 29 | be improved: 30 | 31 | 1) The current "starting gate" system for trying to make multiple threads 32 | start processing at roughly the same time is not particularly good. 33 | Perhaps RDTSC should be used instead of QueryPerformanceCounter, but 34 | really it probably doesn't actually help one way or the other, and 35 | the ideal thing would be an OS strobe of some kind. 36 | 37 | 2) There hasn't been any real CPUID testing, so it may be erroneously 38 | enabling AVX when it should not. I did not use the try/except formulation 39 | here because doing so requires implementing a stack handler, which 40 | I didn't think was worth it. 41 | 42 | 3) It's unclear that timestamps should bother with RDTSC at all, since 43 | it is not currently used for statistics and it is not as stable with 44 | respect to core boosting as QueryPerformanceCounter should theoretically 45 | be. Perhaps switch to just counters, no clocks, for the stats? 46 | */ 47 | 48 | #define VERSION_STRING "r1" 49 | #define BLOCK_SIZE 128 50 | 51 | #ifdef LLVM_MCA 52 | #define MCA_BEGIN(Region) __asm volatile("# LLVM-MCA-BEGIN" #Region) 53 | #define MCA_END(Region) __asm volatile("# LLVM-MCA-END" #Region) 54 | #else 55 | #define MCA_BEGIN(...) 56 | #define MCA_END(...) 57 | #endif 58 | 59 | #ifdef __clang__ 60 | #define function_avx2 static __attribute__ ((__target__("avx2"))) 61 | #define function_avx512 static __attribute__ ((__target__("avx512f"))) 62 | #define CTAssert(TestExpression) // TODO(casey): How do I get a static assert in C in CLANG? 63 | #else 64 | #define function_avx2 static 65 | #define function_avx512 static 66 | #define CTAssert(TestExpression) static_assert(TestExpression, "Expression not true: (" #TestExpression ")") 67 | #endif 68 | 69 | #define function static 70 | #define global static 71 | 72 | #define SizeOf(thing) sizeof(thing) 73 | #define ArrayCount(Array) (SizeOf(Array) / SizeOf((Array)[0])) 74 | 75 | typedef unsigned char u8; 76 | typedef unsigned int u32; 77 | typedef unsigned long long u64; 78 | typedef unsigned long long s64; 79 | typedef u32 b32; 80 | 81 | typedef struct time 82 | { 83 | u64 Clock; 84 | u64 Counter; 85 | } time; 86 | 87 | typedef struct memory_operation memory_operation; 88 | typedef void memory_operation_handler(memory_operation *); 89 | 90 | typedef struct memory_pattern 91 | { 92 | u8 *Source; 93 | s64 SourceStride; 94 | u64 SourceMask; 95 | 96 | u8 *Dest; 97 | s64 DestStride; 98 | u64 DestMask; 99 | } memory_pattern; 100 | 101 | struct memory_operation 102 | { 103 | // 104 | // NOTE(casey): Input 105 | // 106 | 107 | memory_pattern Pattern; 108 | 109 | u64 Count; 110 | u8 *Values; 111 | 112 | memory_operation_handler *Handler; 113 | u64 StartGateCounter; 114 | 115 | // 116 | // NOTE(casey): Output 117 | // 118 | 119 | time StartStamp; 120 | time EndStamp; 121 | 122 | // NOTE(casey): Because threads write back into their operations, care must be taken to ensure memory_operation 123 | // structures exactly fill cache lines. 124 | u64 Pad[2]; 125 | }; 126 | CTAssert(SizeOf(memory_operation) == 128); 127 | 128 | typedef struct time_stat 129 | { 130 | time Min; 131 | time Max; 132 | time Sum; 133 | u32 Count; 134 | } time_stat; 135 | 136 | typedef struct memory_test_results 137 | { 138 | char Name[256]; 139 | 140 | time_stat Total; 141 | time_stat Thread; 142 | 143 | u64 TotalSize; 144 | u32 ThreadCount; 145 | u32 HandlerIndex; 146 | } memory_test_results; 147 | 148 | #define HANDLER_ENTRY(Function) {Function, #Function} 149 | typedef struct handler_table_entry 150 | { 151 | memory_operation_handler *Function; 152 | char *Name; 153 | } handler_table_entry; 154 | 155 | typedef struct context 156 | { 157 | time BaseHz; 158 | u32 MaxThreadCount; 159 | 160 | u32 HandlerCount; 161 | handler_table_entry *Handlers; 162 | 163 | char *CPUBrand; 164 | u32 LogicalCoreCount; 165 | } context; 166 | 167 | // NOTE(casey): The platform-specific code provides these functions 168 | function void DispatchWork(context *Context, u32 OpCount, memory_operation *Ops); 169 | function memory_operation *ReceiveWorkResult(context *Context); 170 | function void Statusf(char const *Format, ...); 171 | function void Dataf(char const *Format, ...); 172 | function void *AllocateAndClear(u64 Size); 173 | -------------------------------------------------------------------------------- /build.bat: -------------------------------------------------------------------------------- 1 | @echo off 2 | 3 | set BaseName=blandwidth 4 | set CLLinkFlags=-nodefaultlib -incremental:no -opt:ref -machine:x64 -STACK:0x100000,0x100000 -manifest:no -subsystem:console user32.lib kernel32.lib 5 | set CLCompileFlags=-Zi -d2Zi+ -Gy -GF -Gs9999999 -GS- -GR- -EHs- -EHc- -EHa- -WX -W4 -nologo -FC -Gm- -diagnostics:column -fp:except- -fp:fast 6 | set CLANGCompileFlags=-g -fno-autolink -nostdlib -nostdlib++ -mno-stack-arg-probe 7 | set CLANGLinkFlags=-fuse-ld=lld -Wl,-subsystem:console,user32.lib,kernel32.lib 8 | 9 | IF NOT EXIST build mkdir build 10 | pushd build 11 | 12 | echo ----------------- 13 | echo Building debug... 14 | call cl -Fe%BaseName%_debug_msvc.exe -Od %CLCompileFlags% ../win32_%BaseName%.c /link %CLLinkFlags% 15 | call clang++ %common% %CLANGCompileFlags% %CLANGLinkFlags% -x c ../win32_%BaseName%.c -o %BaseName%_debug_clang.exe 16 | 17 | echo ----------------- 18 | echo Building release... 19 | call cl -Fe%BaseName%_release_msvc.exe -Oi -Oxb2 -O2 %CLCompileFlags% ../win32_%BaseName%.c /link %CLLinkFlags% -RELEASE 20 | call clang++ %common% -O3 %CLANGCompileFlags% %CLANGLinkFlags% -x c ../win32_%BaseName%.c -o %BaseName%_release_clang.exe 21 | 22 | echo ----------------- 23 | echo Generating analysis... 24 | call clang++ %common% -O3 -DLLVM_MCA=1 %CLANGCompileFlags% -x c ../win32_%BaseName%.c -mllvm -x86-asm-syntax=intel -S -o %BaseName%_release_clang.asm 25 | call llvm-mca %BaseName%_release_clang.asm > %BaseName%_release_clang.mca 26 | 27 | popd -------------------------------------------------------------------------------- /win32_blandwidth.c: -------------------------------------------------------------------------------- 1 | /* ======================================================================== 2 | $File: work/tools/blandwidth/win32_blandwidth.c $ 3 | $Date: 2020/06/18 00:32:25 UTC $ 4 | $Revision: 2 $ 5 | $Creator: Casey Muratori $ 6 | ======================================================================== */ 7 | 8 | #include 9 | #include 10 | #include 11 | #include 12 | #ifdef __clang__ 13 | #include 14 | #include 15 | #include 16 | #include 17 | #endif 18 | 19 | #include "blandwidth.h" 20 | 21 | #define TIME_OPEN(Stamp) QueryPerformanceCounter((LARGE_INTEGER *)&(Stamp).Counter); (Stamp).Clock = __rdtsc() 22 | #define TIME_CLOSE(Stamp) (Stamp).Clock = __rdtsc(); QueryPerformanceCounter((LARGE_INTEGER *)&(Stamp).Counter) 23 | 24 | #include "x64_blandwidth.c" 25 | #include "blandwidth.c" 26 | 27 | typedef struct win32_queues 28 | { 29 | HANDLE Result; 30 | HANDLE Dispatch; 31 | } win32_queues; 32 | 33 | typedef struct win32_context 34 | { 35 | context Context; 36 | win32_queues Queues; 37 | } win32_context; 38 | 39 | function void 40 | DispatchWork(context *Context, u32 OpCount, memory_operation *Ops) 41 | { 42 | win32_context *Win32Context = (win32_context *)Context; 43 | for(u32 OpIndex = 0; 44 | OpIndex < OpCount; 45 | ++OpIndex) 46 | { 47 | PostQueuedCompletionStatus(Win32Context->Queues.Dispatch, 0, 0, (OVERLAPPED *)(Ops + OpIndex)); 48 | } 49 | } 50 | 51 | function memory_operation * 52 | ReceiveWorkResult(context *Context) 53 | { 54 | win32_context *Win32Context = (win32_context *)Context; 55 | DWORD IgnoredBytes; 56 | ULONG_PTR IgnoredKey; 57 | OVERLAPPED *Overlapped; 58 | GetQueuedCompletionStatus(Win32Context->Queues.Result, &IgnoredBytes, &IgnoredKey, &Overlapped, INFINITE); 59 | memory_operation *Result = (memory_operation *)Overlapped; 60 | return(Result); 61 | } 62 | 63 | function void 64 | Statusf(char const *Format, ...) 65 | { 66 | char Buffer[1024]; 67 | 68 | va_list Args; 69 | va_start(Args, Format); 70 | u32 Length = wvsprintf(Buffer, Format, Args); 71 | va_end(Args); 72 | 73 | DWORD Ignored; 74 | WriteFile(GetStdHandle(STD_ERROR_HANDLE), Buffer, Length, &Ignored, 0); 75 | } 76 | 77 | function void 78 | Dataf(char const *Format, ...) 79 | { 80 | char Buffer[1024]; 81 | 82 | va_list Args; 83 | va_start(Args, Format); 84 | u32 Length = wvsprintf(Buffer, Format, Args); 85 | va_end(Args); 86 | 87 | DWORD Ignored; 88 | WriteFile(GetStdHandle(STD_OUTPUT_HANDLE), Buffer, Length, &Ignored, 0); 89 | } 90 | 91 | function void * 92 | AllocateAndClear(u64 Size) 93 | { 94 | void *Result = VirtualAlloc(0, Size, MEM_COMMIT, PAGE_READWRITE); 95 | if(!Result) 96 | { 97 | Statusf("ERROR: Unable to allocate required memory.\n"); 98 | ExitProcess(1); 99 | } 100 | 101 | return(Result); 102 | } 103 | 104 | function DWORD WINAPI 105 | ThreadEntryPoint(void *Passthrough) 106 | { 107 | win32_queues *Queues = (win32_queues *)Passthrough; 108 | 109 | /* NOTE(casey): The semantic analysis in modern compilers is actively awful. I had to do while() here 110 | because if I did for(;;), it errored out because the return(0) was unreachable, and if I got rid of 111 | the return(0), it errored out because the function didn't return a value. I spend so much of my 112 | time dealing with stupid stuff like this, it makes me loathe C/C++ specs and compilers, because they 113 | are clearly not designed with effective programming in mind :( */ 114 | while(Queues) 115 | { 116 | DWORD IgnoredBytes; 117 | ULONG_PTR IgnoredKey; 118 | OVERLAPPED *Overlapped; 119 | GetQueuedCompletionStatus(Queues->Dispatch, &IgnoredBytes, &IgnoredKey, &Overlapped, INFINITE); 120 | memory_operation *Op = (memory_operation *)Overlapped; 121 | 122 | do 123 | { 124 | TIME_OPEN(Op->StartStamp); 125 | } while(Op->StartStamp.Counter < Op->StartGateCounter); 126 | 127 | Op->Handler(Op); 128 | TIME_CLOSE(Op->EndStamp); 129 | 130 | PostQueuedCompletionStatus(Queues->Result, 0, 0, Overlapped); 131 | } 132 | 133 | return(0); 134 | } 135 | 136 | void __cdecl 137 | mainCRTStartup(void) 138 | { 139 | // 140 | // NOTE(casey): Determine base timer and CPU frequencies 141 | // 142 | 143 | time BaseHz; 144 | QueryPerformanceFrequency((LARGE_INTEGER *)&BaseHz.Counter); 145 | BaseHz.Clock = 0; 146 | 147 | time SleepBegin; 148 | TIME_OPEN(SleepBegin); 149 | Sleep(1000); 150 | time SleepEnd; 151 | TIME_CLOSE(SleepEnd); 152 | 153 | time Delta = Subtract(SleepEnd, SleepBegin); 154 | BaseHz.Clock = (Delta.Clock * BaseHz.Counter) / Delta.Counter; 155 | 156 | // 157 | // NOTE(casey): Configure testing setup based on CPU parameters 158 | // 159 | 160 | SYSTEM_INFO SysInfo = {0}; 161 | GetSystemInfo(&SysInfo); 162 | u32 MaxThreadCount = SysInfo.dwNumberOfProcessors; 163 | 164 | int CID[4] = {0}; 165 | char CPUBrand[64] = {0}; 166 | __cpuidex((int *)(CPUBrand + 0), 0x80000002, 0); 167 | __cpuidex((int *)(CPUBrand + 16), 0x80000003, 0); 168 | __cpuidex((int *)(CPUBrand + 32), 0x80000004, 0); 169 | 170 | handler_table_entry MemoryHandlers[] = 171 | { 172 | HANDLER_ENTRY(X64Read128), HANDLER_ENTRY(X64Write128), HANDLER_ENTRY(X64ReadWrite128), 173 | HANDLER_ENTRY(X64Read256), HANDLER_ENTRY(X64Write256), HANDLER_ENTRY(X64ReadWrite256), 174 | HANDLER_ENTRY(X64Read512), HANDLER_ENTRY(X64Write512), HANDLER_ENTRY(X64ReadWrite512), 175 | }; 176 | 177 | u32 HandlerCount = 3; // NOTE(casey): We assume SSE for all x64 chips 178 | 179 | __cpuidex(CID, 1, 0); 180 | if((CID[2] & (1 << 28))) 181 | { 182 | HandlerCount = 6; // NOTE(casey): AVX is supported 183 | __cpuidex(CID, 7, 0); 184 | if((CID[1] & (1 << 16))) 185 | { 186 | HandlerCount = 9; // NOTE(casey): AVX-512 is supported 187 | } 188 | } 189 | 190 | // 191 | // NOTE(casey): Prepare threads 192 | // 193 | 194 | win32_queues Queues; 195 | Queues.Dispatch = CreateIoCompletionPort(INVALID_HANDLE_VALUE, 0, 0, 0); 196 | Queues.Result = CreateIoCompletionPort(INVALID_HANDLE_VALUE, 0, 0, 0); 197 | 198 | DWORD *ThreadIDs = (DWORD *)AllocateAndClear(MaxThreadCount*SizeOf(DWORD)); 199 | for(u32 ThreadIndex = 0; 200 | ThreadIndex < MaxThreadCount; 201 | ++ThreadIndex) 202 | { 203 | u32 StackSize = 1024*1024; // NOTE(casey): We need extremely little stack space, but we don't know how much the OS might need, so we err high 204 | HANDLE Thread = CreateThread(0, StackSize, ThreadEntryPoint, &Queues, 0, ThreadIDs + ThreadIndex); 205 | if(Thread == INVALID_HANDLE_VALUE) 206 | { 207 | Statusf("Unable to create thread"); 208 | ExitProcess(2); 209 | } 210 | 211 | CloseHandle(Thread); 212 | } 213 | 214 | // 215 | // NOTE(casey): Run tests 216 | // 217 | 218 | win32_context Win32Context = {0}; 219 | Win32Context.Context.BaseHz = BaseHz; 220 | Win32Context.Context.MaxThreadCount = MaxThreadCount; 221 | Win32Context.Context.HandlerCount = HandlerCount; 222 | Win32Context.Context.Handlers = MemoryHandlers; 223 | Win32Context.Context.CPUBrand = CPUBrand; 224 | Win32Context.Context.LogicalCoreCount = MaxThreadCount; 225 | Win32Context.Queues = Queues; 226 | 227 | Main(&Win32Context.Context); 228 | 229 | // 230 | // NOTE(casey): Exit 231 | // 232 | 233 | ExitProcess(0); 234 | } 235 | 236 | #undef function 237 | #pragma function(memset) 238 | void *memset(void *DestInit, int SourceInit, size_t Size) 239 | { 240 | unsigned char Source = *(unsigned char *)&SourceInit; 241 | unsigned char *Dest = (unsigned char *)DestInit; 242 | while(Size--) 243 | { 244 | *Dest++ = Source; 245 | } 246 | 247 | return(DestInit); 248 | } 249 | 250 | #pragma function(memcpy) 251 | void *memcpy(void *DestInit, void const *SourceInit, size_t Size) 252 | { 253 | unsigned char *Source = (unsigned char *)SourceInit; 254 | unsigned char *Dest = (unsigned char *)DestInit; 255 | while(Size--) 256 | { 257 | *Dest++ = *Source++; 258 | } 259 | return(DestInit); 260 | } 261 | 262 | -------------------------------------------------------------------------------- /x64_blandwidth.c: -------------------------------------------------------------------------------- 1 | /* ======================================================================== 2 | $File: work/tools/blandwidth/x64_blandwidth.c $ 3 | $Date: 2020/06/16 21:46:28 UTC $ 4 | $Revision: 1 $ 5 | $Creator: Casey Muratori $ 6 | ======================================================================== */ 7 | 8 | // NOTE(keeba): This is used instead of _mm256_xor_si256 because _mm256_xor_ps does not require AVX2. 9 | #define Xor256(A, B) _mm256_castps_si256(_mm256_xor_ps(_mm256_castsi256_ps(A), _mm256_castsi256_ps(B))) 10 | 11 | function void 12 | X64Read128(memory_operation *Op) 13 | { 14 | CTAssert(BLOCK_SIZE == (8*SizeOf(__m128i))); 15 | 16 | memory_pattern Pattern = Op->Pattern; 17 | __m128i *Values = (__m128i *)Op->Values; 18 | u64 SourceOffset = 0; 19 | u64 Count = Op->Count; 20 | 21 | __m128i V0 = _mm_loadu_si128(Values + 0); 22 | __m128i V1 = _mm_loadu_si128(Values + 1); 23 | __m128i V2 = _mm_loadu_si128(Values + 2); 24 | __m128i V3 = _mm_loadu_si128(Values + 3); 25 | __m128i V4 = _mm_loadu_si128(Values + 4); 26 | __m128i V5 = _mm_loadu_si128(Values + 5); 27 | __m128i V6 = _mm_loadu_si128(Values + 6); 28 | __m128i V7 = _mm_loadu_si128(Values + 7); 29 | 30 | while(Count--) 31 | { 32 | MCA_BEGIN(Read128); 33 | 34 | __m128i *Source = (__m128i *)(Pattern.Source + SourceOffset); 35 | 36 | __m128i L0 = _mm_loadu_si128(Source + 0); 37 | __m128i L1 = _mm_loadu_si128(Source + 1); 38 | __m128i L2 = _mm_loadu_si128(Source + 2); 39 | __m128i L3 = _mm_loadu_si128(Source + 3); 40 | __m128i L4 = _mm_loadu_si128(Source + 4); 41 | __m128i L5 = _mm_loadu_si128(Source + 5); 42 | __m128i L6 = _mm_loadu_si128(Source + 6); 43 | __m128i L7 = _mm_loadu_si128(Source + 7); 44 | 45 | V0 = _mm_xor_si128(V0, L0); 46 | V1 = _mm_xor_si128(V1, L1); 47 | V2 = _mm_xor_si128(V2, L2); 48 | V3 = _mm_xor_si128(V3, L3); 49 | V4 = _mm_xor_si128(V4, L4); 50 | V5 = _mm_xor_si128(V5, L5); 51 | V6 = _mm_xor_si128(V6, L6); 52 | V7 = _mm_xor_si128(V7, L7); 53 | 54 | SourceOffset = (SourceOffset + Pattern.SourceStride) & Pattern.SourceMask; 55 | } 56 | 57 | MCA_END(Read128); 58 | 59 | _mm_storeu_si128(Values + 0, V0); 60 | _mm_storeu_si128(Values + 1, V1); 61 | _mm_storeu_si128(Values + 2, V2); 62 | _mm_storeu_si128(Values + 3, V3); 63 | _mm_storeu_si128(Values + 4, V4); 64 | _mm_storeu_si128(Values + 5, V5); 65 | _mm_storeu_si128(Values + 6, V6); 66 | _mm_storeu_si128(Values + 7, V7); 67 | } 68 | 69 | function void 70 | X64Write128(memory_operation *Op) 71 | { 72 | CTAssert(BLOCK_SIZE == (8*SizeOf(__m128i))); 73 | 74 | memory_pattern Pattern = Op->Pattern; 75 | __m128i *Values = (__m128i *)Op->Values; 76 | u64 DestOffset = 0; 77 | u64 Count = Op->Count; 78 | 79 | __m128i V0 = _mm_loadu_si128(Values + 0); 80 | __m128i V1 = _mm_loadu_si128(Values + 1); 81 | __m128i V2 = _mm_loadu_si128(Values + 2); 82 | __m128i V3 = _mm_loadu_si128(Values + 3); 83 | __m128i V4 = _mm_loadu_si128(Values + 4); 84 | __m128i V5 = _mm_loadu_si128(Values + 5); 85 | __m128i V6 = _mm_loadu_si128(Values + 6); 86 | __m128i V7 = _mm_loadu_si128(Values + 7); 87 | 88 | while(Count--) 89 | { 90 | MCA_BEGIN(Write128); 91 | 92 | __m128i *Dest = (__m128i *)(Pattern.Dest + DestOffset); 93 | 94 | V0 = _mm_xor_si128(V0, V1); 95 | V1 = _mm_xor_si128(V1, V2); 96 | V2 = _mm_xor_si128(V2, V3); 97 | V3 = _mm_xor_si128(V3, V4); 98 | V4 = _mm_xor_si128(V4, V5); 99 | V5 = _mm_xor_si128(V5, V6); 100 | V6 = _mm_xor_si128(V6, V7); 101 | V7 = _mm_xor_si128(V7, V0); 102 | 103 | _mm_storeu_si128(Dest + 0, V0); 104 | _mm_storeu_si128(Dest + 1, V1); 105 | _mm_storeu_si128(Dest + 2, V2); 106 | _mm_storeu_si128(Dest + 3, V3); 107 | _mm_storeu_si128(Dest + 4, V4); 108 | _mm_storeu_si128(Dest + 5, V5); 109 | _mm_storeu_si128(Dest + 6, V6); 110 | _mm_storeu_si128(Dest + 7, V7); 111 | 112 | DestOffset = (DestOffset + Pattern.DestStride) & Pattern.DestMask; 113 | } 114 | MCA_END(Write128); 115 | 116 | _mm_storeu_si128(Values + 0, V0); 117 | _mm_storeu_si128(Values + 1, V1); 118 | _mm_storeu_si128(Values + 2, V2); 119 | _mm_storeu_si128(Values + 3, V3); 120 | _mm_storeu_si128(Values + 4, V4); 121 | _mm_storeu_si128(Values + 5, V5); 122 | _mm_storeu_si128(Values + 6, V6); 123 | _mm_storeu_si128(Values + 7, V7); 124 | } 125 | 126 | function void 127 | X64ReadWrite128(memory_operation *Op) 128 | { 129 | CTAssert(BLOCK_SIZE == (8*SizeOf(__m128i))); 130 | 131 | memory_pattern Pattern = Op->Pattern; 132 | __m128i *Values = (__m128i *)Op->Values; 133 | u64 SourceOffset = 0; 134 | u64 DestOffset = 0; 135 | u64 Count = Op->Count; 136 | 137 | __m128i V0 = _mm_loadu_si128(Values + 0); 138 | __m128i V1 = _mm_loadu_si128(Values + 1); 139 | __m128i V2 = _mm_loadu_si128(Values + 2); 140 | __m128i V3 = _mm_loadu_si128(Values + 3); 141 | __m128i V4 = _mm_loadu_si128(Values + 4); 142 | __m128i V5 = _mm_loadu_si128(Values + 5); 143 | __m128i V6 = _mm_loadu_si128(Values + 6); 144 | __m128i V7 = _mm_loadu_si128(Values + 7); 145 | 146 | while(Count--) 147 | { 148 | MCA_BEGIN(ReadWrite128); 149 | 150 | __m128i *Source = (__m128i *)(Pattern.Source + SourceOffset); 151 | __m128i *Dest = (__m128i *)(Pattern.Dest + DestOffset); 152 | 153 | __m128i L0 = _mm_loadu_si128(Source + 0); 154 | __m128i L1 = _mm_loadu_si128(Source + 1); 155 | __m128i L2 = _mm_loadu_si128(Source + 2); 156 | __m128i L3 = _mm_loadu_si128(Source + 3); 157 | 158 | V0 = _mm_xor_si128(V0, L0); 159 | V1 = _mm_xor_si128(V1, L1); 160 | V2 = _mm_xor_si128(V2, L2); 161 | V3 = _mm_xor_si128(V3, L3); 162 | 163 | _mm_storeu_si128(Dest + 0, V0); 164 | _mm_storeu_si128(Dest + 1, V1); 165 | _mm_storeu_si128(Dest + 2, V2); 166 | _mm_storeu_si128(Dest + 3, V3); 167 | 168 | __m128i L4 = _mm_loadu_si128(Source + 4); 169 | __m128i L5 = _mm_loadu_si128(Source + 5); 170 | __m128i L6 = _mm_loadu_si128(Source + 6); 171 | __m128i L7 = _mm_loadu_si128(Source + 7); 172 | 173 | V4 = _mm_xor_si128(V4, L4); 174 | V5 = _mm_xor_si128(V5, L5); 175 | V6 = _mm_xor_si128(V6, L6); 176 | V7 = _mm_xor_si128(V7, L7); 177 | 178 | _mm_storeu_si128(Dest + 4, V4); 179 | _mm_storeu_si128(Dest + 5, V5); 180 | _mm_storeu_si128(Dest + 6, V6); 181 | _mm_storeu_si128(Dest + 7, V7); 182 | 183 | SourceOffset = (SourceOffset + Pattern.SourceStride) & Pattern.SourceMask; 184 | DestOffset = (DestOffset + Pattern.DestStride) & Pattern.DestMask; 185 | } 186 | MCA_END(ReadWrite128); 187 | 188 | _mm_storeu_si128(Values + 0, V0); 189 | _mm_storeu_si128(Values + 1, V1); 190 | _mm_storeu_si128(Values + 2, V2); 191 | _mm_storeu_si128(Values + 3, V3); 192 | _mm_storeu_si128(Values + 4, V4); 193 | _mm_storeu_si128(Values + 5, V5); 194 | _mm_storeu_si128(Values + 6, V6); 195 | _mm_storeu_si128(Values + 7, V7); 196 | } 197 | 198 | function_avx2 void 199 | X64Read256(memory_operation *Op) 200 | { 201 | CTAssert(BLOCK_SIZE == (4*SizeOf(__m256i))); 202 | 203 | memory_pattern Pattern = Op->Pattern; 204 | __m256i *Values = (__m256i *)Op->Values; 205 | u64 SourceOffset = 0; 206 | u64 Count = Op->Count; 207 | 208 | __m256i V0 = _mm256_loadu_si256(Values + 0); 209 | __m256i V1 = _mm256_loadu_si256(Values + 1); 210 | __m256i V2 = _mm256_loadu_si256(Values + 2); 211 | __m256i V3 = _mm256_loadu_si256(Values + 3); 212 | 213 | while(Count--) 214 | { 215 | MCA_BEGIN(Read256); 216 | 217 | __m256i *Source = (__m256i *)(Pattern.Source + SourceOffset); 218 | 219 | __m256i L0 = _mm256_loadu_si256(Source + 0); 220 | __m256i L1 = _mm256_loadu_si256(Source + 1); 221 | __m256i L2 = _mm256_loadu_si256(Source + 2); 222 | __m256i L3 = _mm256_loadu_si256(Source + 3); 223 | 224 | V0 = Xor256(V0, L0); 225 | V1 = Xor256(V1, L1); 226 | V2 = Xor256(V2, L2); 227 | V3 = Xor256(V3, L3); 228 | 229 | SourceOffset = (SourceOffset + Pattern.SourceStride) & Pattern.SourceMask; 230 | } 231 | MCA_END(Read256); 232 | 233 | _mm256_storeu_si256(Values + 0, V0); 234 | _mm256_storeu_si256(Values + 1, V1); 235 | _mm256_storeu_si256(Values + 2, V2); 236 | _mm256_storeu_si256(Values + 3, V3); 237 | } 238 | 239 | function_avx2 void 240 | X64Write256(memory_operation *Op) 241 | { 242 | CTAssert(BLOCK_SIZE == (4*SizeOf(__m256i))); 243 | 244 | memory_pattern Pattern = Op->Pattern; 245 | __m256i *Values = (__m256i *)Op->Values; 246 | u64 DestOffset = 0; 247 | u64 Count = Op->Count; 248 | 249 | __m256i V0 = _mm256_loadu_si256(Values + 0); 250 | __m256i V1 = _mm256_loadu_si256(Values + 1); 251 | __m256i V2 = _mm256_loadu_si256(Values + 2); 252 | __m256i V3 = _mm256_loadu_si256(Values + 3); 253 | 254 | while(Count--) 255 | { 256 | MCA_BEGIN(Write256); 257 | 258 | __m256i *Dest = (__m256i *)(Pattern.Dest + DestOffset); 259 | 260 | V0 = Xor256(V0, V1); 261 | V1 = Xor256(V1, V2); 262 | V2 = Xor256(V2, V3); 263 | V3 = Xor256(V3, V0); 264 | 265 | _mm256_storeu_si256(Dest + 0, V0); 266 | _mm256_storeu_si256(Dest + 1, V1); 267 | _mm256_storeu_si256(Dest + 2, V2); 268 | _mm256_storeu_si256(Dest + 3, V3); 269 | 270 | DestOffset = (DestOffset + Pattern.DestStride) & Pattern.DestMask; 271 | } 272 | MCA_END(Write256); 273 | 274 | _mm256_storeu_si256(Values + 0, V0); 275 | _mm256_storeu_si256(Values + 1, V1); 276 | _mm256_storeu_si256(Values + 2, V2); 277 | _mm256_storeu_si256(Values + 3, V3); 278 | } 279 | 280 | function_avx2 void 281 | X64ReadWrite256(memory_operation *Op) 282 | { 283 | CTAssert(BLOCK_SIZE == (4*SizeOf(__m256i))); 284 | 285 | memory_pattern Pattern = Op->Pattern; 286 | __m256i *Values = (__m256i *)Op->Values; 287 | u64 SourceOffset = 0; 288 | u64 DestOffset = 0; 289 | u64 Count = Op->Count; 290 | 291 | __m256i V0 = _mm256_loadu_si256(Values + 0); 292 | __m256i V1 = _mm256_loadu_si256(Values + 1); 293 | __m256i V2 = _mm256_loadu_si256(Values + 2); 294 | __m256i V3 = _mm256_loadu_si256(Values + 3); 295 | 296 | while(Count--) 297 | { 298 | MCA_BEGIN(ReadWrite256); 299 | 300 | __m256i *Source = (__m256i *)(Pattern.Source + SourceOffset); 301 | __m256i *Dest = (__m256i *)(Pattern.Dest + DestOffset); 302 | 303 | __m256i L0 = _mm256_loadu_si256(Source + 0); 304 | __m256i L1 = _mm256_loadu_si256(Source + 1); 305 | __m256i L2 = _mm256_loadu_si256(Source + 2); 306 | __m256i L3 = _mm256_loadu_si256(Source + 3); 307 | 308 | V0 = Xor256(V0, L0); 309 | V1 = Xor256(V1, L1); 310 | V2 = Xor256(V2, L2); 311 | V3 = Xor256(V3, L3); 312 | 313 | _mm256_storeu_si256(Dest + 0, V0); 314 | _mm256_storeu_si256(Dest + 1, V1); 315 | _mm256_storeu_si256(Dest + 2, V2); 316 | _mm256_storeu_si256(Dest + 3, V3); 317 | 318 | SourceOffset = (SourceOffset + Pattern.SourceStride) & Pattern.SourceMask; 319 | DestOffset = (DestOffset + Pattern.DestStride) & Pattern.DestMask; 320 | } 321 | MCA_END(ReadWrite256); 322 | 323 | _mm256_storeu_si256(Values + 0, V0); 324 | _mm256_storeu_si256(Values + 1, V1); 325 | _mm256_storeu_si256(Values + 2, V2); 326 | _mm256_storeu_si256(Values + 3, V3); 327 | } 328 | 329 | function_avx512 void 330 | X64Read512(memory_operation *Op) 331 | { 332 | CTAssert(BLOCK_SIZE == (2*SizeOf(__m512i))); 333 | 334 | memory_pattern Pattern = Op->Pattern; 335 | __m512i *Values = (__m512i *)Op->Values; 336 | u64 SourceOffset = 0; 337 | u64 Count = Op->Count; 338 | 339 | __m512i V0 = _mm512_loadu_si512(Values + 0); 340 | __m512i V1 = _mm512_loadu_si512(Values + 1); 341 | 342 | while(Count--) 343 | { 344 | __m512i *Source = (__m512i *)(Pattern.Source + SourceOffset); 345 | 346 | __m512i L0 = _mm512_loadu_si512(Source + 0); 347 | __m512i L1 = _mm512_loadu_si512(Source + 1); 348 | 349 | V0 = _mm512_xor_si512(V0, L0); 350 | V1 = _mm512_xor_si512(V1, L1); 351 | 352 | SourceOffset = (SourceOffset + Pattern.SourceStride) & Pattern.SourceMask; 353 | } 354 | 355 | _mm512_storeu_si512(Values + 0, V0); 356 | _mm512_storeu_si512(Values + 1, V1); 357 | } 358 | 359 | function_avx512 void 360 | X64Write512(memory_operation *Op) 361 | { 362 | CTAssert(BLOCK_SIZE == (2*SizeOf(__m512i))); 363 | 364 | memory_pattern Pattern = Op->Pattern; 365 | __m512i *Values = (__m512i *)Op->Values; 366 | u64 DestOffset = 0; 367 | u64 Count = Op->Count; 368 | 369 | __m512i V0 = _mm512_loadu_si512(Values + 0); 370 | __m512i V1 = _mm512_loadu_si512(Values + 1); 371 | 372 | while(Count--) 373 | { 374 | __m512i *Dest = (__m512i *)(Pattern.Dest + DestOffset); 375 | 376 | V0 = _mm512_xor_si512(V0, V1); 377 | V1 = _mm512_xor_si512(V1, V0); 378 | 379 | _mm512_storeu_si512(Dest + 0, V0); 380 | _mm512_storeu_si512(Dest + 1, V1); 381 | 382 | DestOffset = (DestOffset + Pattern.DestStride) & Pattern.DestMask; 383 | } 384 | 385 | _mm512_storeu_si512(Values + 0, V0); 386 | _mm512_storeu_si512(Values + 1, V1); 387 | } 388 | 389 | function_avx512 void 390 | X64ReadWrite512(memory_operation *Op) 391 | { 392 | CTAssert(BLOCK_SIZE == (2*SizeOf(__m512i))); 393 | 394 | memory_pattern Pattern = Op->Pattern; 395 | __m512i *Values = (__m512i *)Op->Values; 396 | u64 SourceOffset = 0; 397 | u64 DestOffset = 0; 398 | u64 Count = Op->Count; 399 | 400 | __m512i V0 = _mm512_loadu_si512(Values + 0); 401 | __m512i V1 = _mm512_loadu_si512(Values + 1); 402 | 403 | while(Count--) 404 | { 405 | __m512i *Source = (__m512i *)(Pattern.Source + SourceOffset); 406 | __m512i *Dest = (__m512i *)(Pattern.Dest + DestOffset); 407 | 408 | __m512i L0 = _mm512_loadu_si512(Source + 0); 409 | __m512i L1 = _mm512_loadu_si512(Source + 1); 410 | 411 | V0 = _mm512_xor_si512(V0, L0); 412 | V1 = _mm512_xor_si512(V1, L1); 413 | 414 | _mm512_storeu_si512(Dest + 0, V0); 415 | _mm512_storeu_si512(Dest + 1, V1); 416 | 417 | SourceOffset = (SourceOffset + Pattern.SourceStride) & Pattern.SourceMask; 418 | DestOffset = (DestOffset + Pattern.DestStride) & Pattern.DestMask; 419 | } 420 | 421 | _mm512_storeu_si512(Values + 0, V0); 422 | _mm512_storeu_si512(Values + 1, V1); 423 | } 424 | --------------------------------------------------------------------------------