sonic-net · lolyu · Jan 7, 2026 · Nov 5, 2025 · Nov 5, 2025 · Nov 6, 2025
diff --git a/lib/RedisRemoteSaiInterface.cpp b/lib/RedisRemoteSaiInterface.cpp
@@ -20,6 +20,8 @@
 
 #include <inttypes.h>
 
+#define SAI_ZMQ_DEFAULT_RESPONSE_BUFFER_SIZE (64*1024*1024)
+
 using namespace sairedis;
 using namespace saimeta;
 using namespace sairediscommon;
@@ -77,13 +79,15 @@ sai_status_t RedisRemoteSaiInterface::apiInitialize(
     m_useTempView = false;
     m_syncMode = false;
     m_redisCommunicationMode = SAI_REDIS_COMMUNICATION_MODE_REDIS_ASYNC;
+    m_zmqResponseBufferSize = SAI_ZMQ_DEFAULT_RESPONSE_BUFFER_SIZE;
 
     if (m_contextConfig->m_zmqEnable)
     {
         m_communicationChannel = std::make_shared<ZeroMQChannel>(
                 m_contextConfig->m_zmqEndpoint,
                 m_contextConfig->m_zmqNtfEndpoint,
-                std::bind(&RedisRemoteSaiInterface::handleNotification, this, _1, _2, _3));
+                std::bind(&RedisRemoteSaiInterface::handleNotification, this, _1, _2, _3),
+                m_zmqResponseBufferSize);
 
         SWSS_LOG_NOTICE("zmq enabled, forcing sync mode");
 
@@ -420,7 +424,8 @@ sai_status_t RedisRemoteSaiInterface::setRedisExtensionAttribute(
                     m_communicationChannel = std::make_shared<ZeroMQChannel>(
                             m_contextConfig->m_zmqEndpoint,
                             m_contextConfig->m_zmqNtfEndpoint,
-                            std::bind(&RedisRemoteSaiInterface::handleNotification, this, _1, _2, _3));
+                            std::bind(&RedisRemoteSaiInterface::handleNotification, this, _1, _2, _3),
+                            m_zmqResponseBufferSize);
 
                     m_communicationChannel->setResponseTimeout(m_responseTimeoutMs);
 

diff --git a/lib/RedisRemoteSaiInterface.h b/lib/RedisRemoteSaiInterface.h
@@ -460,6 +460,8 @@ namespace sairedis
 
             uint64_t m_responseTimeoutMs;
 
+            size_t m_zmqResponseBufferSize;
+
             std::function<sai_switch_notifications_t(std::shared_ptr<Notification>)> m_notificationCallback;
 
             std::map<sai_object_id_t, swss::TableDump> m_tableDump;

diff --git a/lib/ZeroMQChannel.cpp b/lib/ZeroMQChannel.cpp
@@ -12,24 +12,33 @@
 
 using namespace sairedis;
 
-#define ZMQ_RESPONSE_BUFFER_SIZE (64*1024*1024)
 #define ZMQ_MAX_RETRY 10
 
 ZeroMQChannel::ZeroMQChannel(
         _In_ const std::string& endpoint,
         _In_ const std::string& ntfEndpoint,
-        _In_ Channel::Callback callback):
+        _In_ Channel::Callback callback,
+        _In_ long zmqResponseBufferSize):
     Channel(callback),
     m_endpoint(endpoint),
     m_ntfEndpoint(ntfEndpoint),
     m_context(nullptr),
     m_socket(nullptr),
     m_ntfContext(nullptr),
-    m_ntfSocket(nullptr)
+    m_ntfSocket(nullptr),
+    m_zmqResponseBufferSize(zmqResponseBufferSize)
 {
     SWSS_LOG_ENTER();
+    if (m_zmqResponseBufferSize != ZMQ_RESPONSE_DEFAULT_BUFFER_SIZE)
+    {
+        SWSS_LOG_NOTICE("setting zmq response buffer size to %ld bytes", m_zmqResponseBufferSize);
+    }
+    else
+    {
+        SWSS_LOG_NOTICE("using default zmq response buffer size of %ld bytes", ZMQ_RESPONSE_DEFAULT_BUFFER_SIZE);
+    }
 
-    m_buffer.resize(ZMQ_RESPONSE_BUFFER_SIZE);
+    m_buffer.resize(m_zmqResponseBufferSize);
 
     // configure ZMQ for main communication
 
@@ -129,14 +138,14 @@ void ZeroMQChannel::notificationThreadFunction()
 
     std::vector<uint8_t> buffer;
 
-    buffer.resize(ZMQ_RESPONSE_BUFFER_SIZE);
+    buffer.resize(m_zmqResponseBufferSize);
 
     while (m_runNotificationThread)
     {
         // NOTE: this entire loop internal could be encapsulated into separate class
         // which will inherit from Selectable class, and name this as ntf receiver
 
-        int rc = zmq_recv(m_ntfSocket, buffer.data(), ZMQ_RESPONSE_BUFFER_SIZE, 0);
+        int rc = zmq_recv(m_ntfSocket, buffer.data(), m_zmqResponseBufferSize, 0);
 
         if (!m_runNotificationThread)
             break;
@@ -156,10 +165,10 @@ void ZeroMQChannel::notificationThreadFunction()
             continue;
         }
 
-        if (rc >= ZMQ_RESPONSE_BUFFER_SIZE)
+        if (rc >= m_zmqResponseBufferSize)
         {
             SWSS_LOG_WARN("zmq_recv message was truncated (over %d bytes, received %d), increase buffer size, message DROPPED",
-                    ZMQ_RESPONSE_BUFFER_SIZE,
+                    m_zmqResponseBufferSize,
                     rc);
 
             continue;
@@ -291,7 +300,7 @@ sai_status_t ZeroMQChannel::wait(
 
     for (int i = 0; true ; ++i)
     {
-        rc = zmq_recv(m_socket, m_buffer.data(), ZMQ_RESPONSE_BUFFER_SIZE, 0);
+        rc = zmq_recv(m_socket, m_buffer.data(), m_zmqResponseBufferSize, 0);
 
         if (rc < 0 && zmq_errno() == EINTR && i < ZMQ_MAX_RETRY)
         {
@@ -301,10 +310,10 @@ sai_status_t ZeroMQChannel::wait(
         {
             SWSS_LOG_THROW("zmq_recv failed, zmqerrno: %d", zmq_errno());
         }
-        if (rc >= ZMQ_RESPONSE_BUFFER_SIZE)
+        if (rc >= m_zmqResponseBufferSize)
         {
             SWSS_LOG_THROW("zmq_recv message was truncated (over %d bytes, received %d), increase buffer size, message DROPPED",
-                    ZMQ_RESPONSE_BUFFER_SIZE,
+                    m_zmqResponseBufferSize,
                     rc);
         }
         break;

diff --git a/lib/ZeroMQChannel.h b/lib/ZeroMQChannel.h
@@ -10,6 +10,8 @@
 #include <memory>
 #include <functional>
 
+#define ZMQ_RESPONSE_DEFAULT_BUFFER_SIZE (4*1024*1024)
+
 namespace sairedis
 {
     class ZeroMQChannel:
@@ -20,7 +22,8 @@ namespace sairedis
             ZeroMQChannel(
                     _In_ const std::string& endpoint,
                     _In_ const std::string& ntfEndpoint,
-                    _In_ Channel::Callback callback);
+                    _In_ Channel::Callback callback,
+                    _In_ long zmqResponseBufferSize = ZMQ_RESPONSE_DEFAULT_BUFFER_SIZE);
 
             virtual ~ZeroMQChannel();
 
@@ -63,5 +66,7 @@ namespace sairedis
             void* m_ntfContext;
 
             void* m_ntfSocket;
+
+            long m_zmqResponseBufferSize;
     };
 }
diff --git a/meta/ZeroMQSelectableChannel.cpp b/meta/ZeroMQSelectableChannel.cpp
@@ -6,27 +6,36 @@
 #include <zmq.h>
 #include <unistd.h>
 
-#define ZMQ_RESPONSE_BUFFER_SIZE (64*1024*1024)
-
 //#define ZMQ_POLL_TIMEOUT (2*60*1000)
 #define ZMQ_POLL_TIMEOUT (1000)
 
 using namespace sairedis;
 
 ZeroMQSelectableChannel::ZeroMQSelectableChannel(
-        _In_ const std::string& endpoint):
+        _In_ const std::string& endpoint,
+        _In_ long zmqResponseBufferSize):
     m_endpoint(endpoint),
     m_context(nullptr),
     m_socket(nullptr),
     m_fd(0),
     m_allowZmqPoll(false),
-    m_runThread(true)
+    m_runThread(true),
+    m_zmqResponseBufferSize(zmqResponseBufferSize)
 {
     SWSS_LOG_ENTER();
 
     SWSS_LOG_NOTICE("binding on %s", endpoint.c_str());
 
-    m_buffer.resize(ZMQ_RESPONSE_BUFFER_SIZE);
+    if (m_zmqResponseBufferSize != ZMQ_RESPONSE_DEFAULT_BUFFER_SIZE)
+    {
+        SWSS_LOG_NOTICE("setting zmq response buffer size to %ld bytes", m_zmqResponseBufferSize);
+    }
+    else
+    {
+        SWSS_LOG_NOTICE("using default zmq response buffer size of %ld bytes", ZMQ_RESPONSE_DEFAULT_BUFFER_SIZE);
+    }
+
+    m_buffer.resize(m_zmqResponseBufferSize);
 
     m_context = zmq_ctx_new();;
 
@@ -230,17 +239,17 @@ uint64_t ZeroMQSelectableChannel::readData()
     // clear selectable event so it could be triggered in next select()
     m_selectableEvent.readData();
 
-    int rc = zmq_recv(m_socket, m_buffer.data(), ZMQ_RESPONSE_BUFFER_SIZE, 0);
+    int rc = zmq_recv(m_socket, m_buffer.data(), m_zmqResponseBufferSize, 0);
 
     if (rc < 0)
     {
         SWSS_LOG_THROW("zmq_recv failed, zmqerrno: %d", zmq_errno());
     }
 
-    if (rc >= ZMQ_RESPONSE_BUFFER_SIZE)
+    if (rc >= m_zmqResponseBufferSize)
     {
         SWSS_LOG_THROW("zmq_recv message was truncated (over %d bytes, received %d), increase buffer size, message DROPPED",
-                ZMQ_RESPONSE_BUFFER_SIZE,
+                m_zmqResponseBufferSize,
                 rc);
     }
 

diff --git a/meta/ZeroMQSelectableChannel.h b/meta/ZeroMQSelectableChannel.h
@@ -9,6 +9,8 @@
 #include <thread>
 #include <memory>
 
+#define ZMQ_RESPONSE_DEFAULT_BUFFER_SIZE (4*1024*1024)
+
 namespace sairedis
 {
     class ZeroMQSelectableChannel:
@@ -17,7 +19,8 @@ namespace sairedis
         public:
 
             ZeroMQSelectableChannel(
-                    _In_ const std::string& endpoint);
+                    _In_ const std::string& endpoint,
+                    _In_ long zmqResponseBufferSize = ZMQ_RESPONSE_DEFAULT_BUFFER_SIZE);
 
             virtual ~ZeroMQSelectableChannel();
 
@@ -75,5 +78,7 @@ namespace sairedis
             std::shared_ptr<std::thread> m_zmlPollThread;
 
             swss::SelectableEvent m_selectableEvent;
+
+            long m_zmqResponseBufferSize;
     };
 }
diff --git a/syncd/Syncd.cpp b/syncd/Syncd.cpp
@@ -40,6 +40,7 @@
 
 #define DEF_SAI_WARM_BOOT_DATA_FILE "/var/warmboot/sai-warmboot.bin"
 #define SAI_FAILURE_DUMP_SCRIPT "/usr/bin/sai_failure_dump.sh"
+#define SYNCD_ZMQ_RESPONSE_BUFFER_SIZE (64*1024*1024)
 
 using namespace syncd;
 using namespace saimeta;
@@ -134,7 +135,7 @@ Syncd::Syncd(
 
         m_enableSyncMode = true;
 
-        m_selectableChannel = std::make_shared<sairedis::ZeroMQSelectableChannel>(m_contextConfig->m_zmqEndpoint);
+        m_selectableChannel = std::make_shared<sairedis::ZeroMQSelectableChannel>(m_contextConfig->m_zmqEndpoint, SYNCD_ZMQ_RESPONSE_BUFFER_SIZE);
     }
     else
     {