Emitting coherent output from multiple threads for printf

A system for emitting coherent formatted output from multiple execution threads, the system comprising:

• a memory that is configured for access by a multi-threaded processor and a display processor;
• and
• the multi-threaded processor that is configured to:
• receive a printf command for execution by multiple execution threads;
• for each execution thread of the multiple execution threads, examine contents of a printf string including a format string and data elements referenced by the printf command;
• for each execution thread of the multiple execution threads, determine a thread-specific amount of the memory needed to store the contents of the printf string;
• allocate contiguous portions of the memory in the thread-specific amounts for the multiple execution thread in a buffer that is written by the multiple execution threads and read by the display processor;
• and
• indicate, by each execution thread of the multiple execution threads, when each one of the contiguous portions of the memory is ready to be read and formatted as specified by the format string by the display processor.

A non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to emit coherent output from multiple execution threads, by performing the steps of:

• receiving a printf command for execution by multiple execution threads;
• for each execution thread of the multiple execution threads, examining contents of a printf string including a format string and data elements referenced by the printf command;
• for each execution thread of the multiple execution threads, determining a thread-specific amount of memory needed to store the contents of the printf string;
• allocating contiguous portions of memory in the thread-specific amounts for the multiple execution thread in a buffer that is written by the multiple execution threads and read by a display processor;
• and
• indicating, by each execution thread of the multiple execution threads, when each one of the contiguous portions of the memory is ready to be read and formatted by the display processor as specified by the format string.