diff --git a/opengl/libs/Android.bp b/opengl/libs/Android.bp
index b19a862..91250b9 100644
--- a/opengl/libs/Android.bp
+++ b/opengl/libs/Android.bp
@@ -63,6 +63,18 @@
     unversioned_until: "current",
 }
 
+aconfig_declarations {
+    name: "egl_flags",
+    package: "com.android.graphics.egl.flags",
+    container: "system",
+    srcs: ["EGL/egl_flags.aconfig"],
+}
+
+cc_aconfig_library {
+    name: "libegl_flags",
+    aconfig_declarations: "egl_flags",
+}
+
 cc_defaults {
     name: "gl_libs_defaults",
     cflags: [
@@ -136,6 +148,7 @@
     ],
     export_include_dirs: ["EGL"],
     shared_libs: [
+        "libegl_flags",
         "libz",
     ],
 }
@@ -166,6 +179,7 @@
         "android.hardware.configstore@1.0",
         "android.hardware.configstore-utils",
         "libbase",
+        "libegl_flags",
         "libhidlbase",
         "libnativebridge_lazy",
         "libnativeloader_lazy",
@@ -202,6 +216,7 @@
         "EGL/MultifileBlobCache_test.cpp",
     ],
     shared_libs: [
+        "libegl_flags",
         "libutils",
         "libz",
     ],
diff --git a/opengl/libs/EGL/MultifileBlobCache.cpp b/opengl/libs/EGL/MultifileBlobCache.cpp
index f7e33b3..04c525e 100644
--- a/opengl/libs/EGL/MultifileBlobCache.cpp
+++ b/opengl/libs/EGL/MultifileBlobCache.cpp
@@ -38,11 +38,20 @@
 
 #include <utils/JenkinsHash.h>
 
+#include <com_android_graphics_egl_flags.h>
+
+using namespace com::android::graphics::egl;
+
 using namespace std::literals;
 
 constexpr uint32_t kMultifileMagic = 'MFB$';
 constexpr uint32_t kCrcPlaceholder = 0;
 
+// When removing files, what fraction of the overall limit should be reached when removing files
+// A divisor of two will decrease the cache to 50%, four to 25% and so on
+// We use the same limit to manage size and entry count
+constexpr uint32_t kCacheLimitDivisor = 2;
+
 namespace {
 
 // Helper function to close entries or free them
@@ -72,6 +81,7 @@
         mMaxTotalEntries(maxTotalEntries),
         mTotalCacheSize(0),
         mTotalCacheEntries(0),
+        mTotalCacheSizeDivisor(kCacheLimitDivisor),
         mHotCacheLimit(0),
         mHotCacheSize(0),
         mWorkerThreadIdle(true) {
@@ -80,8 +90,13 @@
         return;
     }
 
-    // Set the cache version, override if debug value set
+    // Set the cache version
     mCacheVersion = kMultifileBlobCacheVersion;
+    // Bump the version if we're using flagged features
+    if (flags::multifile_blobcache_advanced_usage()) {
+        mCacheVersion++;
+    }
+    // Override if debug value set
     int debugCacheVersion = base::GetIntProperty("debug.egl.blobcache.cache_version", -1);
     if (debugCacheVersion >= 0) {
         ALOGV("INIT: Using %u as cacheVersion instead of %u", debugCacheVersion, mCacheVersion);
@@ -122,7 +137,7 @@
     // Check that our cacheVersion and buildId match
     struct stat st;
     if (stat(mMultifileDirName.c_str(), &st) == 0) {
-        if (checkStatus(mMultifileDirName.c_str())) {
+        if (checkStatus(mMultifileDirName)) {
             statusGood = true;
         } else {
             ALOGV("INIT: Cache status has changed, clearing the cache");
@@ -237,11 +252,9 @@
 
                 ALOGV("INIT: Entry %u is good, tracking it now.", entryHash);
 
-                // Track details for rapid lookup later
-                trackEntry(entryHash, header.valueSize, fileSize, st.st_atime);
-
-                // Track the total size
-                increaseTotalCacheSize(fileSize);
+                // Track details for rapid lookup later and update total size
+                // Note access time is a full timespec instead of just seconds
+                trackEntry(entryHash, header.valueSize, fileSize, st.st_atim);
 
                 // Preload the entry for fast retrieval
                 if ((mHotCacheSize + fileSize) < mHotCacheLimit) {
@@ -317,6 +330,28 @@
     // Generate a hash of the key and use it to track this entry
     uint32_t entryHash = android::JenkinsHashMixBytes(0, static_cast<const uint8_t*>(key), keySize);
 
+    std::string fullPath = mMultifileDirName + "/" + std::to_string(entryHash);
+
+    // See if we already have this file
+    if (flags::multifile_blobcache_advanced_usage() && contains(entryHash)) {
+        // Remove previous entry from hot cache
+        removeFromHotCache(entryHash);
+
+        // Remove previous entry and update the overall cache size
+        removeEntry(entryHash);
+
+        // If valueSize is zero, this is an indication that the user wants to remove the entry from
+        // cache It has already been removed from tracking, now remove it from disk It is safe to do
+        // this immediately because we drained the write queue in removeFromHotCache
+        if (valueSize == 0) {
+            ALOGV("SET: Zero size detected for existing entry, removing %u from cache", entryHash);
+            if (remove(fullPath.c_str()) != 0) {
+                ALOGW("SET: Error removing %s: %s", fullPath.c_str(), std::strerror(errno));
+            }
+            return;
+        }
+    }
+
     size_t fileSize = sizeof(MultifileHeader) + keySize + valueSize;
 
     // If we're going to be over the cache limit, kick off a trim to clear space
@@ -339,13 +374,12 @@
     memcpy(static_cast<void*>(buffer + sizeof(MultifileHeader) + keySize),
            static_cast<const void*>(value), valueSize);
 
-    std::string fullPath = mMultifileDirName + "/" + std::to_string(entryHash);
-
-    // Track the size and access time for quick recall
-    trackEntry(entryHash, valueSize, fileSize, time(0));
-
-    // Update the overall cache size
-    increaseTotalCacheSize(fileSize);
+    // Track the size and access time for quick recall and update the overall cache size
+    struct timespec time = {0, 0};
+    if (flags::multifile_blobcache_advanced_usage()) {
+        clock_gettime(CLOCK_REALTIME, &time);
+    }
+    trackEntry(entryHash, valueSize, fileSize, time);
 
     // Keep the entry in hot cache for quick retrieval
     ALOGV("SET: Adding %u to hot cache.", entryHash);
@@ -427,6 +461,14 @@
     if (mHotCache.find(entryHash) != mHotCache.end()) {
         ALOGV("GET: HotCache HIT for entry %u", entryHash);
         cacheEntry = mHotCache[entryHash].entryBuffer;
+
+        if (flags::multifile_blobcache_advanced_usage()) {
+            // Update last access time on disk
+            struct timespec times[2];
+            times[0].tv_nsec = UTIME_NOW;
+            times[1].tv_nsec = UTIME_OMIT;
+            utimensat(0, fullPath.c_str(), times, 0);
+        }
     } else {
         ALOGV("GET: HotCache MISS for entry: %u", entryHash);
 
@@ -455,6 +497,14 @@
         cacheEntry =
                 reinterpret_cast<uint8_t*>(mmap(nullptr, fileSize, PROT_READ, MAP_PRIVATE, fd, 0));
 
+        if (flags::multifile_blobcache_advanced_usage()) {
+            // Update last access time and omit last modify time
+            struct timespec times[2];
+            times[0].tv_nsec = UTIME_NOW;
+            times[1].tv_nsec = UTIME_OMIT;
+            futimens(fd, times);
+        }
+
         // We can close the file now and the mmap will remain
         close(fd);
 
@@ -491,6 +541,13 @@
         return 0;
     }
 
+    if (flags::multifile_blobcache_advanced_usage()) {
+        // Update the entry time for this hash, so it reflects LRU
+        struct timespec time;
+        clock_gettime(CLOCK_REALTIME, &time);
+        updateEntryTime(entryHash, time);
+    }
+
     // Remaining entry following the key is the value
     uint8_t* cachedValue = cacheEntry + (keySize + sizeof(MultifileHeader));
     memcpy(value, cachedValue, cachedValueSize);
@@ -626,9 +683,47 @@
 }
 
 void MultifileBlobCache::trackEntry(uint32_t entryHash, EGLsizeiANDROID valueSize, size_t fileSize,
-                                    time_t accessTime) {
+                                    const timespec& accessTime) {
+#if COM_ANDROID_GRAPHICS_EGL_FLAGS(MULTIFILE_BLOBCACHE_ADVANCED_USAGE)
+    // When we add this entry to the map, it is sorted by accessTime
+    MultifileEntryStatsMapIter entryStatsIter =
+            mEntryStats.emplace(std::piecewise_construct, std::forward_as_tuple(accessTime),
+                                std::forward_as_tuple(entryHash, valueSize, fileSize));
+
+    // Track all entries with quick access to its stats
+    mEntries.emplace(entryHash, entryStatsIter);
+#else
+    (void)accessTime;
     mEntries.insert(entryHash);
-    mEntryStats[entryHash] = {valueSize, fileSize, accessTime};
+    mEntryStats[entryHash] = {entryHash, valueSize, fileSize};
+#endif // COM_ANDROID_GRAPHICS_EGL_FLAGS(MULTIFILE_BLOBCACHE_ADVANCED_USAGE)
+
+    increaseTotalCacheSize(fileSize);
+}
+
+bool MultifileBlobCache::removeEntry(uint32_t entryHash) {
+    auto entryIter = mEntries.find(entryHash);
+    if (entryIter == mEntries.end()) {
+        return false;
+    }
+
+#if COM_ANDROID_GRAPHICS_EGL_FLAGS(MULTIFILE_BLOBCACHE_ADVANCED_USAGE)
+    MultifileEntryStatsMapIter entryStatsIter = entryIter->second;
+    MultifileEntryStats entryStats = entryStatsIter->second;
+    decreaseTotalCacheSize(entryStats.fileSize);
+#else
+    auto entryStatsIter = mEntryStats.find(entryHash);
+    if (entryStatsIter == mEntryStats.end()) {
+        ALOGE("Failed to remove entryHash (%u) from mEntryStats", entryHash);
+        return false;
+    }
+    decreaseTotalCacheSize(entryStatsIter->second.fileSize);
+#endif // COM_ANDROID_GRAPHICS_EGL_FLAGS(MULTIFILE_BLOBCACHE_ADVANCED_USAGE)
+
+    mEntryStats.erase(entryStatsIter);
+    mEntries.erase(entryIter);
+
+    return true;
 }
 
 bool MultifileBlobCache::contains(uint32_t hashEntry) const {
@@ -636,7 +731,40 @@
 }
 
 MultifileEntryStats MultifileBlobCache::getEntryStats(uint32_t entryHash) {
+#if COM_ANDROID_GRAPHICS_EGL_FLAGS(MULTIFILE_BLOBCACHE_ADVANCED_USAGE)
+    auto entryIter = mEntries.find(entryHash);
+    if (entryIter == mEntries.end()) {
+        return {};
+    }
+
+    MultifileEntryStatsMapIter entryStatsIter = entryIter->second;
+    MultifileEntryStats entryStats = entryStatsIter->second;
+    return entryStats;
+#else
     return mEntryStats[entryHash];
+#endif // COM_ANDROID_GRAPHICS_EGL_FLAGS(MULTIFILE_BLOBCACHE_ADVANCED_USAGE)
+}
+
+void MultifileBlobCache::updateEntryTime(uint32_t entryHash, const timespec& newTime) {
+#if COM_ANDROID_GRAPHICS_EGL_FLAGS(MULTIFILE_BLOBCACHE_ADVANCED_USAGE)
+    // This function updates the ordering of the map by removing the old iterators
+    // and re-adding them. If should be perforant as it does not perform a full re-sort.
+    // First, pull out the old entryStats
+    auto entryIter = mEntries.find(entryHash);
+    MultifileEntryStatsMapIter entryStatsIter = entryIter->second;
+    MultifileEntryStats entryStats = std::move(entryStatsIter->second);
+
+    // Remove the old iterators
+    mEntryStats.erase(entryStatsIter);
+    mEntries.erase(entryIter);
+
+    // Insert the new with updated time
+    entryStatsIter = mEntryStats.emplace(std::make_pair(newTime, std::move(entryStats)));
+    mEntries.emplace(entryHash, entryStatsIter);
+#else
+    (void)entryHash;
+    (void)newTime;
+#endif // COM_ANDROID_GRAPHICS_EGL_FLAGS(MULTIFILE_BLOBCACHE_ADVANCED_USAGE)
 }
 
 void MultifileBlobCache::increaseTotalCacheSize(size_t fileSize) {
@@ -718,31 +846,32 @@
 bool MultifileBlobCache::applyLRU(size_t cacheSizeLimit, size_t cacheEntryLimit) {
     // Walk through our map of sorted last access times and remove files until under the limit
     for (auto cacheEntryIter = mEntryStats.begin(); cacheEntryIter != mEntryStats.end();) {
+#if COM_ANDROID_GRAPHICS_EGL_FLAGS(MULTIFILE_BLOBCACHE_ADVANCED_USAGE)
+        const MultifileEntryStats& entryStats = cacheEntryIter->second;
+        uint32_t entryHash = entryStats.entryHash;
+#else
         uint32_t entryHash = cacheEntryIter->first;
+        const MultifileEntryStats& entryStats = cacheEntryIter->second;
+#endif // COM_ANDROID_GRAPHICS_EGL_FLAGS(MULTIFILE_BLOBCACHE_ADVANCED_USAGE)
 
         ALOGV("LRU: Removing entryHash %u", entryHash);
 
-        // Track the overall size
-        MultifileEntryStats entryStats = getEntryStats(entryHash);
-        decreaseTotalCacheSize(entryStats.fileSize);
-
         // Remove it from hot cache if present
         removeFromHotCache(entryHash);
 
         // Remove it from the system
         std::string entryPath = mMultifileDirName + "/" + std::to_string(entryHash);
         if (remove(entryPath.c_str()) != 0) {
-            ALOGE("LRU: Error removing %s: %s", entryPath.c_str(), std::strerror(errno));
-            return false;
+            // Continue evicting invalid item (app's cache might be cleared)
+            ALOGW("LRU: Error removing %s: %s", entryPath.c_str(), std::strerror(errno));
         }
 
         // Increment the iterator before clearing the entry
         cacheEntryIter++;
 
-        // Delete the entry from our tracking
-        size_t count = mEntryStats.erase(entryHash);
-        if (count != 1) {
-            ALOGE("LRU: Failed to remove entryHash (%u) from mEntryStats", entryHash);
+        // Delete the entry from our tracking and update the overall cache size
+        if (!removeEntry(entryHash)) {
+            ALOGE("LRU: Failed to remove entryHash %u", entryHash);
             return false;
         }
 
@@ -794,11 +923,6 @@
     return true;
 }
 
-// When removing files, what fraction of the overall limit should be reached when removing files
-// A divisor of two will decrease the cache to 50%, four to 25% and so on
-// We use the same limit to manage size and entry count
-constexpr uint32_t kCacheLimitDivisor = 2;
-
 // Calculate the cache size and remove old entries until under the limit
 void MultifileBlobCache::trimCache() {
     // Wait for all deferred writes to complete
@@ -806,8 +930,10 @@
     waitForWorkComplete();
 
     ALOGV("TRIM: Reducing multifile cache size to %zu, entries %zu",
-          mMaxTotalSize / kCacheLimitDivisor, mMaxTotalEntries / kCacheLimitDivisor);
-    if (!applyLRU(mMaxTotalSize / kCacheLimitDivisor, mMaxTotalEntries / kCacheLimitDivisor)) {
+          mMaxTotalSize / mTotalCacheSizeDivisor, mMaxTotalEntries / mTotalCacheSizeDivisor);
+
+    if (!applyLRU(mMaxTotalSize / mTotalCacheSizeDivisor,
+                  mMaxTotalEntries / mTotalCacheSizeDivisor)) {
         ALOGE("Error when clearing multifile shader cache");
         return;
     }
@@ -830,9 +956,36 @@
             // Create the file or reset it if already present, read+write for user only
             int fd = open(fullPath.c_str(), O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
             if (fd == -1) {
-                ALOGE("Cache error in SET - failed to open fullPath: %s, error: %s",
-                      fullPath.c_str(), std::strerror(errno));
-                return;
+                if (flags::multifile_blobcache_advanced_usage()) {
+                    struct stat st;
+                    if (stat(mMultifileDirName.c_str(), &st) == -1) {
+                        ALOGW("Cache directory missing (app's cache cleared?). Recreating...");
+
+                        // Restore the multifile directory
+                        if (mkdir(mMultifileDirName.c_str(), 0755) != 0 && (errno != EEXIST)) {
+                            ALOGE("Cache error in SET - Unable to create directory (%s), errno "
+                                  "(%i)",
+                                  mMultifileDirName.c_str(), errno);
+                            return;
+                        }
+
+                        // Create new status file
+                        if (!createStatus(mMultifileDirName.c_str())) {
+                            ALOGE("Cache error in SET - Failed to create status file!");
+                            return;
+                        }
+
+                        // Try to open the file again
+                        fd = open(fullPath.c_str(), O_WRONLY | O_CREAT | O_TRUNC,
+                                  S_IRUSR | S_IWUSR);
+                    }
+                }
+
+                if (fd == -1) {
+                    ALOGE("Cache error in SET - failed to open fullPath: %s, error: %s",
+                          fullPath.c_str(), std::strerror(errno));
+                    return;
+                }
             }
 
             ALOGV("DEFERRED: Opened fd %i from %s", fd, fullPath.c_str());
@@ -849,6 +1002,14 @@
                 return;
             }
 
+            if (flags::multifile_blobcache_advanced_usage()) {
+                // Update last access time and last modify time
+                struct timespec times[2];
+                times[0].tv_nsec = UTIME_NOW;
+                times[1].tv_nsec = UTIME_NOW;
+                futimens(fd, times);
+            }
+
             ALOGV("DEFERRED: Completed write for: %s", fullPath.c_str());
             close(fd);
 
diff --git a/opengl/libs/EGL/MultifileBlobCache.h b/opengl/libs/EGL/MultifileBlobCache.h
index 65aa2db..3bd393f 100644
--- a/opengl/libs/EGL/MultifileBlobCache.h
+++ b/opengl/libs/EGL/MultifileBlobCache.h
@@ -32,6 +32,10 @@
 
 #include "FileBlobCache.h"
 
+#include <com_android_graphics_egl_flags.h>
+
+using namespace com::android::graphics::egl;
+
 namespace android {
 
 constexpr uint32_t kMultifileBlobCacheVersion = 2;
@@ -45,9 +49,9 @@
 };
 
 struct MultifileEntryStats {
+    uint32_t entryHash;
     EGLsizeiANDROID valueSize;
     size_t fileSize;
-    time_t accessTime;
 };
 
 struct MultifileStatus {
@@ -100,6 +104,26 @@
     size_t mBufferSize;
 };
 
+#if COM_ANDROID_GRAPHICS_EGL_FLAGS(MULTIFILE_BLOBCACHE_ADVANCED_USAGE)
+struct MultifileTimeLess {
+    bool operator()(const struct timespec& t1, const struct timespec& t2) const {
+        if (t1.tv_sec == t2.tv_sec) {
+            // If seconds are equal, check nanoseconds
+            return t1.tv_nsec < t2.tv_nsec;
+        } else {
+            // Otherwise, compare seconds
+            return t1.tv_sec < t2.tv_sec;
+        }
+    }
+};
+
+// The third parameter here causes all entries to be sorted by access time,
+// so oldest will be accessed first in applyLRU
+using MultifileEntryStatsMap =
+        std::multimap<struct timespec, MultifileEntryStats, MultifileTimeLess>;
+using MultifileEntryStatsMapIter = MultifileEntryStatsMap::iterator;
+#endif // COM_ANDROID_GRAPHICS_EGL_FLAGS(MULTIFILE_BLOBCACHE_ADVANCED_USAGE)
+
 class MultifileBlobCache {
 public:
     MultifileBlobCache(size_t maxKeySize, size_t maxValueSize, size_t maxTotalSize,
@@ -115,6 +139,7 @@
 
     size_t getTotalSize() const { return mTotalCacheSize; }
     size_t getTotalEntries() const { return mTotalCacheEntries; }
+    size_t getTotalCacheSizeDivisor() const { return mTotalCacheSizeDivisor; }
 
     const std::string& getCurrentBuildId() const { return mBuildId; }
     void setCurrentBuildId(const std::string& buildId) { mBuildId = buildId; }
@@ -124,10 +149,11 @@
 
 private:
     void trackEntry(uint32_t entryHash, EGLsizeiANDROID valueSize, size_t fileSize,
-                    time_t accessTime);
+                    const timespec& accessTime);
     bool contains(uint32_t entryHash) const;
     bool removeEntry(uint32_t entryHash);
     MultifileEntryStats getEntryStats(uint32_t entryHash);
+    void updateEntryTime(uint32_t entryHash, const timespec& newTime);
 
     bool createStatus(const std::string& baseDir);
     bool checkStatus(const std::string& baseDir);
@@ -151,8 +177,14 @@
     std::string mBuildId;
     uint32_t mCacheVersion;
 
+#if COM_ANDROID_GRAPHICS_EGL_FLAGS(MULTIFILE_BLOBCACHE_ADVANCED_USAGE)
+    std::unordered_map<uint32_t, MultifileEntryStatsMapIter> mEntries;
+    MultifileEntryStatsMap mEntryStats;
+#else
     std::unordered_set<uint32_t> mEntries;
     std::unordered_map<uint32_t, MultifileEntryStats> mEntryStats;
+#endif // COM_ANDROID_GRAPHICS_EGL_FLAGS(MULTIFILE_BLOBCACHE_ADVANCED_USAGE)
+
     std::unordered_map<uint32_t, MultifileHotCache> mHotCache;
 
     size_t mMaxKeySize;
@@ -161,6 +193,7 @@
     size_t mMaxTotalEntries;
     size_t mTotalCacheSize;
     size_t mTotalCacheEntries;
+    size_t mTotalCacheSizeDivisor;
     size_t mHotCacheLimit;
     size_t mHotCacheEntryLimit;
     size_t mHotCacheSize;
diff --git a/opengl/libs/EGL/MultifileBlobCache_test.cpp b/opengl/libs/EGL/MultifileBlobCache_test.cpp
index 90a0f1e..85fb29e 100644
--- a/opengl/libs/EGL/MultifileBlobCache_test.cpp
+++ b/opengl/libs/EGL/MultifileBlobCache_test.cpp
@@ -21,10 +21,15 @@
 #include <fcntl.h>
 #include <gtest/gtest.h>
 #include <stdio.h>
+#include <utils/JenkinsHash.h>
 
 #include <fstream>
 #include <memory>
 
+#include <com_android_graphics_egl_flags.h>
+
+using namespace com::android::graphics::egl;
+
 using namespace std::literals;
 
 namespace android {
@@ -55,6 +60,7 @@
     std::vector<std::string> getCacheEntries();
 
     void clearProperties();
+    bool clearCache();
 
     std::unique_ptr<TemporaryFile> mTempFile;
     std::unique_ptr<MultifileBlobCache> mMBC;
@@ -314,7 +320,7 @@
 
     struct stat info;
     if (stat(multifileDirName.c_str(), &info) == 0) {
-        // We have a multifile dir. Skip the status file and return the only entry.
+        // We have a multifile dir. Skip the status file and return the entries.
         DIR* dir;
         struct dirent* entry;
         if ((dir = opendir(multifileDirName.c_str())) != nullptr) {
@@ -325,6 +331,7 @@
                 if (strcmp(entry->d_name, kMultifileBlobCacheStatusFile) == 0) {
                     continue;
                 }
+                // printf("Found entry: %s\n", entry->d_name);
                 cacheEntries.push_back(multifileDirName + "/" + entry->d_name);
             }
         } else {
@@ -458,6 +465,8 @@
     // Set one entry
     mMBC->set("abcd", 4, "efgh", 4);
 
+    uint32_t initialCacheVersion = mMBC->getCurrentCacheVersion();
+
     // Close the cache so everything writes out
     mMBC->finish();
     mMBC.reset();
@@ -466,7 +475,7 @@
     ASSERT_EQ(getCacheEntries().size(), 1);
 
     // Set a debug cacheVersion
-    std::string newCacheVersion = std::to_string(kMultifileBlobCacheVersion + 1);
+    std::string newCacheVersion = std::to_string(initialCacheVersion + 1);
     ASSERT_TRUE(base::SetProperty("debug.egl.blobcache.cache_version", newCacheVersion.c_str()));
     ASSERT_TRUE(
             base::WaitForProperty("debug.egl.blobcache.cache_version", newCacheVersion.c_str()));
@@ -503,4 +512,404 @@
     ASSERT_EQ(getCacheEntries().size(), 0);
 }
 
+// Ensure cache is correct when a key is reused
+TEST_F(MultifileBlobCacheTest, SameKeyDifferentValues) {
+    if (!flags::multifile_blobcache_advanced_usage()) {
+        GTEST_SKIP() << "Skipping test that requires multifile_blobcache_advanced_usage flag";
+    }
+
+    unsigned char buf[4] = {0xee, 0xee, 0xee, 0xee};
+
+    size_t startingSize = mMBC->getTotalSize();
+
+    // New cache should be empty
+    ASSERT_EQ(startingSize, 0);
+
+    // Set an initial value
+    mMBC->set("ab", 2, "cdef", 4);
+
+    // Grab the new size
+    size_t firstSize = mMBC->getTotalSize();
+
+    // Ensure the size went up
+    // Note: Checking for an exact size is challenging, as the
+    // file size can differ between platforms.
+    ASSERT_GT(firstSize, startingSize);
+
+    // Verify the cache is correct
+    ASSERT_EQ(size_t(4), mMBC->get("ab", 2, buf, 4));
+    ASSERT_EQ('c', buf[0]);
+    ASSERT_EQ('d', buf[1]);
+    ASSERT_EQ('e', buf[2]);
+    ASSERT_EQ('f', buf[3]);
+
+    // Now reuse the key with a smaller value
+    mMBC->set("ab", 2, "gh", 2);
+
+    // Grab the new size
+    size_t secondSize = mMBC->getTotalSize();
+
+    // Ensure it decreased in size
+    ASSERT_LT(secondSize, firstSize);
+
+    // Verify the cache is correct
+    ASSERT_EQ(size_t(2), mMBC->get("ab", 2, buf, 2));
+    ASSERT_EQ('g', buf[0]);
+    ASSERT_EQ('h', buf[1]);
+
+    // Now put back the original value
+    mMBC->set("ab", 2, "cdef", 4);
+
+    // And we should get back a stable size
+    size_t finalSize = mMBC->getTotalSize();
+    ASSERT_EQ(firstSize, finalSize);
+}
+
+// Ensure cache is correct when a key is reused with large value size
+TEST_F(MultifileBlobCacheTest, SameKeyLargeValues) {
+    if (!flags::multifile_blobcache_advanced_usage()) {
+        GTEST_SKIP() << "Skipping test that requires multifile_blobcache_advanced_usage flag";
+    }
+
+    // Create the cache with larger limits to stress test reuse
+    constexpr uint32_t kLocalMaxKeySize = 1 * 1024 * 1024;
+    constexpr uint32_t kLocalMaxValueSize = 4 * 1024 * 1024;
+    constexpr uint32_t kLocalMaxTotalSize = 32 * 1024 * 1024;
+    mMBC.reset(new MultifileBlobCache(kLocalMaxKeySize, kLocalMaxValueSize, kLocalMaxTotalSize,
+                                      kMaxTotalEntries, &mTempFile->path[0]));
+
+    constexpr uint32_t kLargeValueCount = 8;
+    constexpr uint32_t kLargeValueSize = 64 * 1024;
+
+    // Create a several really large values
+    unsigned char largeValue[kLargeValueCount][kLargeValueSize];
+    for (int i = 0; i < kLargeValueCount; i++) {
+        for (int j = 0; j < kLargeValueSize; j++) {
+            // Fill the value with the index for uniqueness
+            largeValue[i][j] = i;
+        }
+    }
+
+    size_t startingSize = mMBC->getTotalSize();
+
+    // New cache should be empty
+    ASSERT_EQ(startingSize, 0);
+
+    // Cycle through the values and set them all in sequence
+    for (int i = 0; i < kLargeValueCount; i++) {
+        mMBC->set("abcd", 4, largeValue[i], kLargeValueSize);
+    }
+
+    // Ensure we get the last one back
+    unsigned char outBuf[kLargeValueSize];
+    mMBC->get("abcd", 4, outBuf, kLargeValueSize);
+
+    for (int i = 0; i < kLargeValueSize; i++) {
+        // Buffer should contain highest index value
+        ASSERT_EQ(kLargeValueCount - 1, outBuf[i]);
+    }
+}
+
+// Ensure cache eviction is LRU
+TEST_F(MultifileBlobCacheTest, CacheEvictionIsLRU) {
+    if (!flags::multifile_blobcache_advanced_usage()) {
+        GTEST_SKIP() << "Skipping test that requires multifile_blobcache_advanced_usage flag";
+    }
+
+    // Fill the cache with exactly how much it can hold
+    int entry = 0;
+    for (entry = 0; entry < kMaxTotalEntries; entry++) {
+        // Use the index as the key and value
+        mMBC->set(&entry, sizeof(entry), &entry, sizeof(entry));
+
+        int result = 0;
+        ASSERT_EQ(sizeof(entry), mMBC->get(&entry, sizeof(entry), &result, sizeof(result)));
+        ASSERT_EQ(entry, result);
+    }
+
+    // Ensure the cache is full
+    ASSERT_EQ(mMBC->getTotalEntries(), kMaxTotalEntries);
+
+    // Add one more entry to trigger eviction
+    size_t overflowEntry = kMaxTotalEntries;
+    mMBC->set(&overflowEntry, sizeof(overflowEntry), &overflowEntry, sizeof(overflowEntry));
+
+    // Verify it contains the right amount, which will be one more than reduced size
+    // because we evict the cache before adding a new entry
+    size_t evictionLimit = kMaxTotalEntries / mMBC->getTotalCacheSizeDivisor();
+    ASSERT_EQ(mMBC->getTotalEntries(), evictionLimit + 1);
+
+    // Ensure cache is as expected, with old entries removed, newer entries remaining
+    for (entry = 0; entry < kMaxTotalEntries; entry++) {
+        int result = 0;
+        mMBC->get(&entry, sizeof(entry), &result, sizeof(result));
+
+        if (entry < evictionLimit) {
+            // We should get no hits on evicted entries, i.e. the first added
+            ASSERT_EQ(result, 0);
+        } else {
+            // Above the limit should still be present
+            ASSERT_EQ(result, entry);
+        }
+    }
+}
+
+// Ensure calling GET on an entry updates its access time, even if already in hotcache
+TEST_F(MultifileBlobCacheTest, GetUpdatesAccessTime) {
+    if (!flags::multifile_blobcache_advanced_usage()) {
+        GTEST_SKIP() << "Skipping test that requires multifile_blobcache_advanced_usage flag";
+    }
+
+    // Fill the cache with exactly how much it can hold
+    int entry = 0;
+    int result = 0;
+    for (entry = 0; entry < kMaxTotalEntries; entry++) {
+        // Use the index as the key and value
+        mMBC->set(&entry, sizeof(entry), &entry, sizeof(entry));
+        ASSERT_EQ(sizeof(entry), mMBC->get(&entry, sizeof(entry), &result, sizeof(result)));
+        ASSERT_EQ(entry, result);
+    }
+
+    // Ensure the cache is full
+    ASSERT_EQ(mMBC->getTotalEntries(), kMaxTotalEntries);
+
+    // GET the first few entries to update their access time
+    std::vector<int> accessedEntries = {1, 2, 3};
+    for (int i = 0; i < accessedEntries.size(); i++) {
+        entry = accessedEntries[i];
+        ASSERT_EQ(sizeof(entry), mMBC->get(&entry, sizeof(entry), &result, sizeof(result)));
+    }
+
+    // Add one more entry to trigger eviction
+    size_t overflowEntry = kMaxTotalEntries;
+    mMBC->set(&overflowEntry, sizeof(overflowEntry), &overflowEntry, sizeof(overflowEntry));
+
+    size_t evictionLimit = kMaxTotalEntries / mMBC->getTotalCacheSizeDivisor();
+
+    // Ensure cache is as expected, with old entries removed, newer entries remaining
+    for (entry = 0; entry < kMaxTotalEntries; entry++) {
+        int result = 0;
+        mMBC->get(&entry, sizeof(entry), &result, sizeof(result));
+
+        if (std::find(accessedEntries.begin(), accessedEntries.end(), entry) !=
+            accessedEntries.end()) {
+            // If this is one of the handful we accessed after filling the cache,
+            // they should still be in the cache because LRU
+            ASSERT_EQ(result, entry);
+        } else if (entry >= (evictionLimit + accessedEntries.size())) {
+            // If they were above the eviction limit (plus three for our updated entries),
+            // they should still be present
+            ASSERT_EQ(result, entry);
+        } else {
+            // Otherwise, they shold be evicted and no longer present
+            ASSERT_EQ(result, 0);
+        }
+    }
+
+    // Close the cache so everything writes out
+    mMBC->finish();
+    mMBC.reset();
+
+    // Open the cache again
+    mMBC.reset(new MultifileBlobCache(kMaxKeySize, kMaxValueSize, kMaxTotalSize, kMaxTotalEntries,
+                                      &mTempFile->path[0]));
+
+    // Check the cache again, ensuring the updated access time made it to disk
+    for (entry = 0; entry < kMaxTotalEntries; entry++) {
+        int result = 0;
+        mMBC->get(&entry, sizeof(entry), &result, sizeof(result));
+        if (std::find(accessedEntries.begin(), accessedEntries.end(), entry) !=
+            accessedEntries.end()) {
+            ASSERT_EQ(result, entry);
+        } else if (entry >= (evictionLimit + accessedEntries.size())) {
+            ASSERT_EQ(result, entry);
+        } else {
+            ASSERT_EQ(result, 0);
+        }
+    }
+}
+
+bool MultifileBlobCacheTest::clearCache() {
+    std::string cachePath = &mTempFile->path[0];
+    std::string multifileDirName = cachePath + ".multifile";
+
+    DIR* dir = opendir(multifileDirName.c_str());
+    if (dir == nullptr) {
+        printf("Error opening directory: %s\n", multifileDirName.c_str());
+        return false;
+    }
+
+    struct dirent* entry;
+    while ((entry = readdir(dir)) != nullptr) {
+        // Skip "." and ".." entries
+        if (std::string(entry->d_name) == "." || std::string(entry->d_name) == "..") {
+            continue;
+        }
+
+        std::string entryPath = multifileDirName + "/" + entry->d_name;
+
+        // Delete the entry (we assert it's a file, nothing nested here)
+        if (unlink(entryPath.c_str()) != 0) {
+            printf("Error deleting file: %s\n", entryPath.c_str());
+            closedir(dir);
+            return false;
+        }
+    }
+
+    closedir(dir);
+
+    // Delete the empty directory itself
+    if (rmdir(multifileDirName.c_str()) != 0) {
+        printf("Error deleting directory %s, error %s\n", multifileDirName.c_str(),
+               std::strerror(errno));
+        return false;
+    }
+
+    return true;
+}
+
+// Recover from lost cache in the case of app clearing it
+TEST_F(MultifileBlobCacheTest, RecoverFromLostCache) {
+    if (!flags::multifile_blobcache_advanced_usage()) {
+        GTEST_SKIP() << "Skipping test that requires multifile_blobcache_advanced_usage flag";
+    }
+
+    int entry = 0;
+    int result = 0;
+
+    uint32_t kEntryCount = 10;
+
+    // Add some entries
+    for (entry = 0; entry < kEntryCount; entry++) {
+        mMBC->set(&entry, sizeof(entry), &entry, sizeof(entry));
+        ASSERT_EQ(sizeof(entry), mMBC->get(&entry, sizeof(entry), &result, sizeof(result)));
+        ASSERT_EQ(entry, result);
+    }
+
+    // For testing, wait until the entries have completed writing
+    mMBC->finish();
+
+    // Manually delete the cache!
+    ASSERT_TRUE(clearCache());
+
+    // Cache should not contain any entries
+    for (entry = 0; entry < kEntryCount; entry++) {
+        ASSERT_EQ(size_t(0), mMBC->get(&entry, sizeof(entry), &result, sizeof(result)));
+    }
+
+    // Ensure we can still add new ones
+    for (entry = kEntryCount; entry < kEntryCount * 2; entry++) {
+        mMBC->set(&entry, sizeof(entry), &entry, sizeof(entry));
+        ASSERT_EQ(sizeof(entry), mMBC->get(&entry, sizeof(entry), &result, sizeof(result)));
+        ASSERT_EQ(entry, result);
+    }
+
+    // Close the cache so everything writes out
+    mMBC->finish();
+    mMBC.reset();
+
+    // Open the cache again
+    mMBC.reset(new MultifileBlobCache(kMaxKeySize, kMaxValueSize, kMaxTotalSize, kMaxTotalEntries,
+                                      &mTempFile->path[0]));
+
+    // Before fixes, writing the second entries to disk should have failed due to missing
+    // cache dir.  But now they should have survived our shutdown above.
+    for (entry = kEntryCount; entry < kEntryCount * 2; entry++) {
+        ASSERT_EQ(sizeof(entry), mMBC->get(&entry, sizeof(entry), &result, sizeof(result)));
+        ASSERT_EQ(entry, result);
+    }
+}
+
+// Ensure cache eviction succeeds if the cache is deleted
+TEST_F(MultifileBlobCacheTest, EvictAfterLostCache) {
+    if (!flags::multifile_blobcache_advanced_usage()) {
+        GTEST_SKIP() << "Skipping test that requires multifile_blobcache_advanced_usage flag";
+    }
+
+    int entry = 0;
+    int result = 0;
+
+    uint32_t kEntryCount = 10;
+
+    // Add some entries
+    for (entry = 0; entry < kEntryCount; entry++) {
+        mMBC->set(&entry, sizeof(entry), &entry, sizeof(entry));
+        ASSERT_EQ(sizeof(entry), mMBC->get(&entry, sizeof(entry), &result, sizeof(result)));
+        ASSERT_EQ(entry, result);
+    }
+
+    // For testing, wait until the entries have completed writing
+    mMBC->finish();
+
+    // Manually delete the cache!
+    ASSERT_TRUE(clearCache());
+
+    // Now start adding entries to trigger eviction, cache should survive
+    for (entry = kEntryCount; entry < 2 * kMaxTotalEntries; entry++) {
+        mMBC->set(&entry, sizeof(entry), &entry, sizeof(entry));
+        ASSERT_EQ(sizeof(entry), mMBC->get(&entry, sizeof(entry), &result, sizeof(result)));
+        ASSERT_EQ(entry, result);
+    }
+
+    // We should have triggered multiple evictions above and remain at or below the
+    // max amount of entries
+    ASSERT_LE(getCacheEntries().size(), kMaxTotalEntries);
+}
+
+// Remove from cache when size is zero
+TEST_F(MultifileBlobCacheTest, ZeroSizeRemovesEntry) {
+    if (!flags::multifile_blobcache_advanced_usage()) {
+        GTEST_SKIP() << "Skipping test that requires multifile_blobcache_advanced_usage flag";
+    }
+
+    // Put some entries in
+    int entry = 0;
+    int result = 0;
+
+    uint32_t kEntryCount = 20;
+
+    // Add some entries
+    for (entry = 0; entry < kEntryCount; entry++) {
+        mMBC->set(&entry, sizeof(entry), &entry, sizeof(entry));
+        ASSERT_EQ(sizeof(entry), mMBC->get(&entry, sizeof(entry), &result, sizeof(result)));
+        ASSERT_EQ(entry, result);
+    }
+
+    // Send some of them again with size zero
+    std::vector<int> removedEntries = {5, 10, 18};
+    for (int i = 0; i < removedEntries.size(); i++) {
+        entry = removedEntries[i];
+        mMBC->set(&entry, sizeof(entry), nullptr, 0);
+    }
+
+    // Ensure they do not get a hit
+    for (int i = 0; i < removedEntries.size(); i++) {
+        entry = removedEntries[i];
+        ASSERT_EQ(size_t(0), mMBC->get(&entry, sizeof(entry), &result, sizeof(result)));
+    }
+
+    // And have been removed from disk
+    std::vector<std::string> diskEntries = getCacheEntries();
+    ASSERT_EQ(diskEntries.size(), kEntryCount - removedEntries.size());
+    for (int i = 0; i < removedEntries.size(); i++) {
+        entry = removedEntries[i];
+        // Generate a hash for our removed entries and ensure they are not contained
+        // Note our entry and key and the same here, so we're hashing the key just like
+        // the multifile blobcache does.
+        uint32_t entryHash =
+                android::JenkinsHashMixBytes(0, reinterpret_cast<uint8_t*>(&entry), sizeof(entry));
+        ASSERT_EQ(std::find(diskEntries.begin(), diskEntries.end(), std::to_string(entryHash)),
+                  diskEntries.end());
+    }
+
+    // Ensure the others are still present
+    for (entry = 0; entry < kEntryCount; entry++) {
+        if (std::find(removedEntries.begin(), removedEntries.end(), entry) ==
+            removedEntries.end()) {
+            ASSERT_EQ(sizeof(entry), mMBC->get(&entry, sizeof(entry), &result, sizeof(result)));
+            ASSERT_EQ(result, entry);
+        }
+    }
+}
+
 } // namespace android
diff --git a/opengl/libs/EGL/egl_flags.aconfig b/opengl/libs/EGL/egl_flags.aconfig
new file mode 100644
index 0000000..1157970
--- /dev/null
+++ b/opengl/libs/EGL/egl_flags.aconfig
@@ -0,0 +1,13 @@
+package: "com.android.graphics.egl.flags"
+container: "system"
+
+flag {
+  name: "multifile_blobcache_advanced_usage"
+  namespace: "gpu"
+  description: "This flag controls new behaviors to address bugs found via advanced usage"
+  bug: "380483358"
+  is_fixed_read_only: true
+  metadata {
+    purpose: PURPOSE_BUGFIX
+  }
+}
diff --git a/opengl/libs/EGL/fuzzer/Android.bp b/opengl/libs/EGL/fuzzer/Android.bp
index 4947e5f..fe5f2a6 100644
--- a/opengl/libs/EGL/fuzzer/Android.bp
+++ b/opengl/libs/EGL/fuzzer/Android.bp
@@ -37,6 +37,7 @@
     ],
 
     shared_libs: [
+        "libegl_flags",
         "libz",
     ],
 
diff --git a/opengl/tests/EGLTest/Android.bp b/opengl/tests/EGLTest/Android.bp
index aebd3f2..ed46efd 100644
--- a/opengl/tests/EGLTest/Android.bp
+++ b/opengl/tests/EGLTest/Android.bp
@@ -26,6 +26,7 @@
         "android.hardware.configstore@1.0",
         "android.hardware.configstore-utils",
         "libEGL",
+        "libegl_flags",
         "libbase",
         "libcutils",
         "libbinder",
diff --git a/services/surfaceflinger/common/FlagManager.cpp b/services/surfaceflinger/common/FlagManager.cpp
index f257c7c..3960bf6 100644
--- a/services/surfaceflinger/common/FlagManager.cpp
+++ b/services/surfaceflinger/common/FlagManager.cpp
@@ -119,6 +119,7 @@
 
     /// Trunk stable readonly flags ///
     DUMP_ACONFIG_FLAG(adpf_fmq_sf);
+    DUMP_ACONFIG_FLAG(arr_setframerate_gte_enum);
     DUMP_ACONFIG_FLAG(connected_display);
     DUMP_ACONFIG_FLAG(enable_small_area_detection);
     DUMP_ACONFIG_FLAG(stable_edid_ids);
@@ -218,6 +219,7 @@
 
 /// Trunk stable readonly flags ///
 FLAG_MANAGER_ACONFIG_FLAG(adpf_fmq_sf, "")
+FLAG_MANAGER_ACONFIG_FLAG(arr_setframerate_gte_enum, "debug.sf.arr_setframerate_gte_enum")
 FLAG_MANAGER_ACONFIG_FLAG(connected_display, "")
 FLAG_MANAGER_ACONFIG_FLAG(enable_small_area_detection, "")
 FLAG_MANAGER_ACONFIG_FLAG(stable_edid_ids, "debug.sf.stable_edid_ids")
diff --git a/services/surfaceflinger/common/include/common/FlagManager.h b/services/surfaceflinger/common/include/common/FlagManager.h
index a461627..1a857c8 100644
--- a/services/surfaceflinger/common/include/common/FlagManager.h
+++ b/services/surfaceflinger/common/include/common/FlagManager.h
@@ -56,6 +56,7 @@
     bool graphite_renderengine_preview_rollout() const;
 
     /// Trunk stable readonly flags ///
+    bool arr_setframerate_gte_enum() const;
     bool adpf_fmq_sf() const;
     bool connected_display() const;
     bool frame_rate_category_mrr() const;
diff --git a/services/surfaceflinger/surfaceflinger_flags_new.aconfig b/services/surfaceflinger/surfaceflinger_flags_new.aconfig
index 2c44e4c..d6a1ad4 100644
--- a/services/surfaceflinger/surfaceflinger_flags_new.aconfig
+++ b/services/surfaceflinger/surfaceflinger_flags_new.aconfig
@@ -34,6 +34,14 @@
 } # arr_setframerate_api
 
 flag {
+  name: "arr_setframerate_gte_enum"
+  namespace: "core_graphics"
+  description: "Exposes GTE (greater than or equal to) enum for Android 16"
+  bug: "380949716"
+  is_fixed_read_only: true
+} # arr_setframerate_gte_enum
+
+flag {
   name: "arr_surfacecontrol_setframerate_api"
   namespace: "core_graphics"
   description: "New SDK SurfaceControl.Transaction#setFrameRate API for Android 16"