## 5.6. Secondary Command Buffer Execution

A secondary command buffer must not be directly submitted to a queue. Instead, secondary command buffers are recorded to execute as part of a primary command buffer with the command:

void vkCmdExecuteCommands(
VkCommandBuffer                             commandBuffer,
uint32_t                                    commandBufferCount,
const VkCommandBuffer*                      pCommandBuffers);

• commandBuffer is a handle to a primary command buffer that the secondary command buffers are executed in.
• commandBufferCount is the length of the pCommandBuffers array.
• pCommandBuffers is an array of secondary command buffer handles, which are recorded to execute in the primary command buffer in the order they are listed in the array.

Once vkCmdExecuteCommands has been called, any prior executions of the secondary command buffers specified by pCommandBuffers in any other primary command buffer become invalidated, unless those secondary command buffers were recorded with VK_COMMAND_BUFFER_USAGE_SIMULTANEOUS_USE_BIT.