diff --git a/api/docs/release.dox b/api/docs/release.dox
index b5a8d48961b..b2bda4aa551 100644
--- a/api/docs/release.dox
+++ b/api/docs/release.dox
@@ -161,6 +161,8 @@ changes:
    signature between AArch64 and RISC-V.
  - Renamed dr_get_sve_vector_length() to dr_get_vector_length() to share function
    signature between AArch64 and RISC-V.
+ - Changed the drcachesim -LL_miss_file option by adding a process ID field to the output.
+   This helps in better analyzing cache misses in multi-process environments.
 
 Further non-compatibility-affecting changes include:
  - Added DWARF-5 support to the drsyms library by linking in 4 static libraries
diff --git a/clients/drcachesim/common/options.cpp b/clients/drcachesim/common/options.cpp
index d13bab39233..64512728973 100644
--- a/clients/drcachesim/common/options.cpp
+++ b/clients/drcachesim/common/options.cpp
@@ -208,11 +208,11 @@ droption_t<std::string> op_LL_miss_file(
     "Path for dumping LLC misses or prefetching hints",
     "If non-empty, when running the cache simulator, requests that "
     "every last-level cache miss be written to a file at the specified path. Each miss "
-    "is written in text format as a <program counter, address> pair. If this tool is "
-    "linked with zlib, the file is written in gzip-compressed format. If non-empty, when "
-    "running the cache miss analyzer, requests that prefetching hints based on the miss "
-    "analysis be written to the specified file. Each hint is written in text format as a "
-    "<program counter, stride, locality level> tuple.");
+    "is written in text format as a <process id, program counter, address> tuple. If "
+    "this tool is linked with zlib, the file is written in gzip-compressed format. If "
+    "non-empty, when running the cache miss analyzer, requests that prefetching hints "
+    "based on the miss analysis be written to the specified file. Each hint is written "
+    "in text format as a <program counter, stride, locality level> tuple.");
 
 droption_t<bool> op_L0_filter_deprecated(
     DROPTION_SCOPE_CLIENT, "L0_filter", false,
diff --git a/clients/drcachesim/simulator/cache_miss_analyzer.cpp b/clients/drcachesim/simulator/cache_miss_analyzer.cpp
index 8228c7c0c31..83d68095ec2 100644
--- a/clients/drcachesim/simulator/cache_miss_analyzer.cpp
+++ b/clients/drcachesim/simulator/cache_miss_analyzer.cpp
@@ -83,6 +83,8 @@ cache_miss_stats_t::dump_miss(const memref_t &memref)
         return;
     }
 
+    // TODO i#6905: Consider incorporating PID information into the pc_cache_misses_ hash
+    // map and adjusting subsequent calculations that depend on this data.
     const addr_t pc = memref.data.pc;
     const addr_t addr = memref.data.addr / kLineSize;
     pc_cache_misses_[pc].push_back(addr);
diff --git a/clients/drcachesim/simulator/caching_device_stats.cpp b/clients/drcachesim/simulator/caching_device_stats.cpp
index 6feea91762a..81bf1150c3b 100644
--- a/clients/drcachesim/simulator/caching_device_stats.cpp
+++ b/clients/drcachesim/simulator/caching_device_stats.cpp
@@ -154,6 +154,7 @@ void
 caching_device_stats_t::dump_miss(const memref_t &memref)
 {
     addr_t pc, addr;
+    memref_pid_t pid;
     if (type_is_instr(memref.instr.type))
         pc = memref.instr.addr;
     else { // data ref: others shouldn't get here
@@ -163,10 +164,15 @@ caching_device_stats_t::dump_miss(const memref_t &memref)
         pc = memref.data.pc;
     }
     addr = memref.data.addr;
+    pid = memref.data.pid;
+
+    // XXX: This writing method to the same file from multiple processes is racy.
+    // It works most of the time but consider using a directory with individual files
+    // per process as a future safer alternative.
 #ifdef HAS_ZLIB
-    gzprintf(file_, "0x%zx,0x%zx\n", pc, addr);
+    gzprintf(file_, "%lld,0x%zx,0x%zx\n", pid, pc, addr);
 #else
-    fprintf(file_, "0x%zx,0x%zx\n", pc, addr);
+    fprintf(file_, "%lld,0x%zx,0x%zx\n", pid, pc, addr);
 #endif
 }