prefetch

Author: VinInn

CondFormats/SiStripObjects/src/SiStripApvGain.cc

@@ -34,7 +34,8 @@ const SiStripApvGain::Range SiStripApvGain::getRange(const uint32_t& DetId) cons
   else{ 
     unsigned int pd= p-v_detids.begin();
     unsigned int ibegin = *(v_ibegin.begin()+pd);
-    unsigned int iend   = *(v_iend.begin()+pd);    
+    unsigned int iend   = *(v_iend.begin()+pd);
+    __builtin_prefetch((&v_gains.front())+ibegin);
     return SiStripApvGain::Range(v_gains.begin()+ibegin,v_gains.begin()+iend);
   }
 }

CondFormats/SiStripObjects/src/SiStripBadStrip.cc

@@ -29,8 +29,12 @@ const SiStripBadStrip::Range SiStripBadStrip::getRange(const uint32_t& DetId) co
   RegistryIterator p = std::lower_bound(indexes.begin(),indexes.end(),DetId,SiStripBadStrip::StrictWeakOrdering());
   if (p==indexes.end()|| p->detid!=DetId) 
     return SiStripBadStrip::Range(v_badstrips.end(),v_badstrips.end()); 
-  else 
+  else {
+    __builtin_prefetch((&v_badstrips.front())+p->ibegin);
+    __builtin_prefetch((&v_badstrips.front())+p->ibegin+24);
+    __builtin_prefetch((&v_badstrips.front())+p->iend-24);
     return SiStripBadStrip::Range(v_badstrips.begin()+p->ibegin,v_badstrips.begin()+p->iend);
+  }
 }
 
 

CondFormats/SiStripObjects/src/SiStripNoises.cc

@@ -37,14 +37,20 @@ const SiStripNoises::Range SiStripNoises::getRange(const uint32_t& DetId) const
 	RegistryIterator p = std::lower_bound(indexes.begin(),indexes.end(),DetId,SiStripNoises::StrictWeakOrdering());
 	if (p==indexes.end()|| p->detid!=DetId) 
 		return SiStripNoises::Range(v_noises.end(),v_noises.end()); 
-	else 
-		return SiStripNoises::Range(v_noises.begin()+p->ibegin,v_noises.begin()+p->iend);
+	else {
+                __builtin_prefetch((&v_noises.front())+p->ibegin);
+       	       	__builtin_prefetch((&v_noises.front())+p->ibegin+96);
+      	       	__builtin_prefetch((&v_noises.front())+p->iend-96);
+ 		return SiStripNoises::Range(v_noises.begin()+p->ibegin,v_noises.begin()+p->iend);
+
+             }
 }
 
 void SiStripNoises::getDetIds(std::vector<uint32_t>& DetIds_) const {
 	// returns vector of DetIds in map
 	SiStripNoises::RegistryIterator begin = indexes.begin();
 	SiStripNoises::RegistryIterator end   = indexes.end();
+        DetIds_.reserve(indexes.size());
 	for (SiStripNoises::RegistryIterator p=begin; p != end; ++p) {
 		DetIds_.push_back(p->detid);
 	}

RecoLocalTracker/SiStripClusterizer/interface/StripClusterizerAlgorithm.h

@@ -60,7 +60,7 @@ class StripClusterizerAlgorithm {
     }	
   }
 
-
+  std::vector<uint32_t> detIds;
   SiStripApvGain::Range gainRange;
   SiStripNoises::Range  noiseRange;
   SiStripQuality::Range qualityRange;

RecoLocalTracker/SiStripClusterizer/src/StripClusterizerAlgorithm.cc

@@ -14,17 +14,21 @@ initialize(const edm::EventSetup& es) {
   uint32_t g_cache_id = es.get<SiStripGainRcd>().cacheIdentifier();
   uint32_t q_cache_id = es.get<SiStripQualityRcd>().cacheIdentifier();
 
-  if(n_cache_id != noise_cache_id) {
-    es.get<SiStripNoisesRcd>().get( noiseHandle );
-    noise_cache_id = n_cache_id;
-  }
   if(g_cache_id != gain_cache_id) {
     es.get<SiStripGainRcd>().get( gainHandle );
     gain_cache_id = g_cache_id;
+    if (detIds.empty()) gainHandle->getDetIds(detIds);
+    std::vector<uint32_t> dum; gainHandle->getDetIds(dum); assert(detIds==dum);
+  }
+  if(n_cache_id != noise_cache_id) {
+    es.get<SiStripNoisesRcd>().get( noiseHandle );
+    noise_cache_id = n_cache_id;
+    std::vector<uint32_t> dum; noiseHandle->getDetIds(dum); assert(detIds==dum);
   }
   if(q_cache_id != quality_cache_id) {
     es.get<SiStripQualityRcd>().get( qualityLabel, qualityHandle );
     quality_cache_id = q_cache_id;
+    std::vector<uint32_t> dum; qualityHandle->getDetIds(dum); assert(detIds==dum);
   }
 }