The queue that is being used is a non-intrusive queue (you can find an implementation in the source code or here). With this queue, there is no contention on the consumer side and producers rarely block the consumer, and to push to the queue producers using an atomic exchange. Here is...
if one user-level thread blocks in a system call, another user-level thread won't run, because the user-level threads scheduler doesn't know that one of its threads has been descheduled by the OS's scheduler. As another example, two user-level threads will not run concurrently...
Design and Implementation of a Flexible Scheduling Mechanism on User-Level Thread Library PPLflexible schedulermultiple schedulersuser level thread libraryexperimental evaluationA flexible scheduling mechanism for user-level thread library PPL is discussed. Although many thread libraries that schedule threads ...
A number of these algorithms have been implemented on the SMASH user-level thread scheduler for sym- metric multiprocessors and multicore processors. All inter-thread communication primitives con- sidered have two implementations: the lock-based implementation and the lock-free implementation. The ...
The Go implementation of the CPU profile collection is in runtime/cpuprof.c. It is of course also possible to collect profiles without timers, such as by rewriting the program code. In general the overhead of these tends to be larger than timer-based sampling, and it can skew the ...
In this paper we present Dynamic Bisectioning or DBS, a simple but powerful comprehensive scheduling policy for user-level threads, which unifies the exploitation of (multidimensional) loop and nested functional (or task) parallelism. Unlike other scheme
SO_REUSEPORT [31] creates a separate accept queue for each application thread to allow multi-threaded applications to accept new connections parallelly. Lockless TCP listener [62] uses a normal ehash table for storing SYN_RECV requests to reduce the lock granularity during the three-way handshake...
In this paper, we present FastUDP, a highly efficient and scalable user-level UDP-based network stack optimization in multi-core systems. FastUDP addresses the inefficiencies from the following three novel designs: (1) enabling the exclusive thread model for improving scalability; (2) adopting a...
Ease of Module Implementation: External developers can easily write and debug modules to be executed in the system using familiar tools and programming techniques. Note that the described system simultaneously addresses both performance and portability issues while eliminating security risks, thereby allowi...
The technique disclosed herein provides for simultaneously checkpointing all of the processes in a specified process group or family at the application level, and restoring those processes at a later