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Decoupling loops from threads to allow fixed thread count

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On large configurations, too many threads would spawn with one thread
per loop. Therefore, threads may now run multiple loops at once. The
thread count is configurable and may be changed during run. All threads
are spawned on startup.

This change helps with memory bloating. BIRD filters need large
temporary memory blocks to store their stack and also memory management
keeps its hot page storage per-thread.

Known bugs:
* Thread autobalancing is not yet implemented.
* Low latency loops are executed together with standard loops.
This commit is contained in:
Maria Matejka
2023-01-19 10:49:47 +01:00
parent 4d8d81f144
commit 84c298465f
17 changed files with 676 additions and 248 deletions
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4
lib/locking.h
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@@ -14,6 +14,7 @@ struct domain_generic;
/* Here define the global lock order; first to last. */
struct lock_order {
struct domain_generic *the_bird;
struct domain_generic *control;
struct domain_generic *proto;
struct domain_generic *service;
struct domain_generic *rtable;
@@ -34,6 +35,9 @@ struct domain_generic *domain_new(const char *name, uint order);
#define DOMAIN_FREE(type, d) domain_free((d).type)
void domain_free(struct domain_generic *);
#define DOMAIN_NAME(type, d) domain_name((d).type)
const char *domain_name(struct domain_generic *);
#define DOMAIN_NULL(type) (DOMAIN(type)) {}
#define LOCK_DOMAIN(type, d) do_lock(((d).type), &(locking_stack.type))