13 #error This program is for 64-bit ARM only.
18   int fd = -1;
28     fd = syscall(__NR_perf_event_open, &pe, 0, -1, -1, 0);  in PerfEvent()
29     if (fd == -1) {  in PerfEvent()
149   // Note that TWO separate tricks are needed here to prevent Cortex-A76  in Workload()
151   //   1. A data-dependency whereby the pointers being dereferenced at the  in Workload()
154   //   2. A pseudo-random sequence. This is the role of register w0,  in Workload()
157   // Cortex-A76 successfully speculates some addresses, resulting in different  in Workload()
165       // in [1 .. 2^32-1].  in Workload()
167       // on Cortex-A76 from prefetching data from future loop iterations.  in Workload()
171       // w1 := size - 1 = size mask (size is required to be power-of-two).  in Workload()
173       // w2 := (pseudorandom value w0) xor (data-dependent sum).  in Workload()
178       "and w1, w1, #-64\n"  in Workload()
182       // This data-dependency is key to preventing speculative execution on  in Workload()
183       // Cortex-A76 from prefetching data from future loop iterations.  in Workload()
229   cache_counts->ld_retired = ld_retired.Stop();  in MeasureCacheCounts()
230   cache_counts->mem_access = mem_access.Stop();  in MeasureCacheCounts()
231   cache_counts->ll_cache = ll_cache.Stop();  in MeasureCacheCounts()
232   cache_counts->ll_cache_miss = ll_cache_miss.Stop();  in MeasureCacheCounts()
233   cache_counts->l1d_cache = l1d_cache.Stop();  in MeasureCacheCounts()
234   cache_counts->l1d_cache_refill = l1d_cache_refill.Stop();  in MeasureCacheCounts()
235   cache_counts->l2d_cache = l2d_cache.Stop();  in MeasureCacheCounts()
236   cache_counts->l2d_cache_refill = l2d_cache_refill.Stop();  in MeasureCacheCounts()
237   cache_counts->l3d_cache = l3d_cache.Stop();  in MeasureCacheCounts()
238   cache_counts->l3d_cache_refill = l3d_cache_refill.Stop();  in MeasureCacheCounts()
256       fprintf(stderr, "inconsistent pie-chart\n");  in ~PieChart()
266                        PieChart* pie) const = 0;
271   void Analyze(const CacheCounts& cache_counts, PieChart* pie) const override {  in Analyze()
272     pie->total = cache_counts.l1d_cache + cache_counts.l1d_cache_refill;  in Analyze()
273     pie->l1_hits = cache_counts.l1d_cache - cache_counts.l2d_cache_refill -  in Analyze()
275     pie->l2_hits = cache_counts.l1d_cache_refill;  in Analyze()
276     pie->l3_hits = cache_counts.l2d_cache_refill;  in Analyze()
277     pie->dram_hits = cache_counts.l3d_cache_refill;  in Analyze()
283   void Analyze(const CacheCounts& cache_counts, PieChart* pie) const override {  in Analyze()
284     pie->total = cache_counts.l1d_cache;  in Analyze()
285     pie->l1_hits = cache_counts.l1d_cache - cache_counts.l2d_cache;  in Analyze()
286     pie->l2_hits = cache_counts.l2d_cache - cache_counts.l3d_cache;  in Analyze()
287     pie->l3_hits = cache_counts.l3d_cache - cache_counts.l3d_cache_refill;  in Analyze()
288     pie->dram_hits = cache_counts.l3d_cache_refill;  in Analyze()
294   void Analyze(const CacheCounts& cache_counts, PieChart* pie) const override {  in Analyze()
295     pie->total = cache_counts.l1d_cache;  in Analyze()
298     pie->l1_hits = cache_counts.l1d_cache - corrected_l2;  in Analyze()
299     pie->l2_hits = corrected_l2 - corrected_l3;  in Analyze()
300     pie->l3_hits = corrected_l3 - cache_counts.l3d_cache_refill;  in Analyze()
301     pie->dram_hits = cache_counts.l3d_cache_refill;  in Analyze()
307   void Analyze(const CacheCounts& cache_counts, PieChart* pie) const override {  in Analyze()
308     pie->total = cache_counts.l1d_cache;  in Analyze()
309     pie->l1_hits = cache_counts.l1d_cache - cache_counts.l1d_cache_refill;  in Analyze()
310     pie->l2_hits =  in Analyze()
311         cache_counts.l1d_cache_refill - cache_counts.l2d_cache_refill;  in Analyze()
312     pie->l3_hits =  in Analyze()
313         cache_counts.l2d_cache_refill - cache_counts.l3d_cache_refill;  in Analyze()
314     pie->dram_hits = cache_counts.l3d_cache_refill;  in Analyze()
320   void Analyze(const CacheCounts& cache_counts, PieChart* pie) const override {  in Analyze()
321     pie->l1_hits =  in Analyze()
322         std::max(0, cache_counts.l1d_cache - cache_counts.l1d_cache_refill);  in Analyze()
323     pie->l2_hits = std::max(  in Analyze()
324         0, cache_counts.l1d_cache_refill - cache_counts.l2d_cache_refill);  in Analyze()
327     pie->l3_hits = std::max(0, cache_counts.l2d_cache_refill - l3_misses);  in Analyze()
328     pie->dram_hits = l3_misses;  in Analyze()
329     pie->total = pie->l1_hits + pie->l2_hits + pie->l3_hits + pie->dram_hits;  in Analyze()
333 void PrintPieChart(const PieChart& pie) {  in PrintPieChart()  argument
334   printf("total accesses: %d\n", pie.total);  in PrintPieChart()
335   double l1_hits_pct = 100. * pie.l1_hits / pie.total;  in PrintPieChart()
336   double l2_hits_pct = 100. * pie.l2_hits / pie.total;  in PrintPieChart()
337   double l3_hits_pct = 100. * pie.l3_hits / pie.total;  in PrintPieChart()
338   double dram_hits_pct = 100. * pie.dram_hits / pie.total;  in PrintPieChart()
347 void PrintPieChartCsvNoNewline(const PieChart& pie) {  in PrintPieChartCsvNoNewline()  argument
348   double l1_hits_pct = 100. * pie.l1_hits / pie.total;  in PrintPieChartCsvNoNewline()
349   double l2_hits_pct = 100. * pie.l2_hits / pie.total;  in PrintPieChartCsvNoNewline()
350   double l3_hits_pct = 100. * pie.l3_hits / pie.total;  in PrintPieChartCsvNoNewline()
351   double dram_hits_pct = 100. * pie.dram_hits / pie.total;  in PrintPieChartCsvNoNewline()
367       PieChart pie;  in Study()  local
368       hypothesis->Analyze(cache_counts, &pie);  in Study()
369       PrintPieChartCsvNoNewline(pie);  in Study()
377       printf("\n%s:\n", hypothesis->Name());  in Study()
378       PieChart pie;  in Study()  local
379       hypothesis->Analyze(cache_counts, &pie);  in Study()
380       PrintPieChart(pie);  in Study()