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hot-reloading for dasm_cache, in case of filesystem changes; file stream layer -> expose filesystem-wide generation number, for very coarse-grained generation number to gracefully depend on filesystem changes passively

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This commit is contained in:
Ryan Fleury
2024-04-25 09:37:16 -07:00
parent f4ea9e66b0
commit 67eede7513
7 changed files with 66 additions and 12 deletions
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src/dasm_cache/dasm_cache.c
+34 -6
View File
@@ -118,7 +118,7 @@ dasm_init(void)
{
dasm_shared->parse_threads[idx] = os_launch_thread(dasm_parse_thread__entry_point, (void *)idx, 0);
}
dasm_shared->evictor_thread = os_launch_thread(dasm_evictor_thread__entry_point, 0, 0);
dasm_shared->evictor_detector_thread = os_launch_thread(dasm_evictor_detector_thread__entry_point, 0, 0);
}
////////////////////////////////
@@ -360,6 +360,7 @@ dasm_parse_thread__entry_point(void *p)
U128 hash = {0};
DASM_Params params = {0};
dasm_u2p_dequeue_req(scratch.arena, &hash, &params);
U64 change_gen = fs_change_gen();
HS_Scope *hs_scope = hs_scope_open();
DBGI_Scope *dbgi_scope = dbgi_scope_open();
TXT_Scope *txt_scope = txt_scope_open();
@@ -613,6 +614,14 @@ dasm_parse_thread__entry_point(void *p)
{
n->info_arena = info_arena;
MemoryCopyStruct(&n->info, &info);
if(dbgi != &dbgi_parse_nil && params.style_flags & (DASM_StyleFlag_SourceLines|DASM_StyleFlag_SourceFilesNames))
{
n->change_gen = change_gen;
}
else
{
n->change_gen = 0;
}
ins_atomic_u32_eval_assign(&n->is_working, 0);
ins_atomic_u64_inc_eval(&n->load_count);
break;
@@ -628,18 +637,21 @@ dasm_parse_thread__entry_point(void *p)
}
////////////////////////////////
//~ rjf: Evictor Threads
//~ rjf: Evictor/Detector Thread
internal void
dasm_evictor_thread__entry_point(void *p)
dasm_evictor_detector_thread__entry_point(void *p)
{
ThreadNameF("[dasm] evictor thread");
ThreadNameF("[dasm] evictor/detector thread");
for(;;)
{
U64 change_gen = fs_change_gen();
U64 check_time_us = os_now_microseconds();
U64 check_time_user_clocks = dasm_user_clock_idx();
U64 evict_threshold_us = 10*1000000;
U64 retry_threshold_us = 1*1000000;
U64 evict_threshold_user_clocks = 10;
U64 retry_threshold_user_clocks = 10;
for(U64 slot_idx = 0; slot_idx < dasm_shared->slots_count; slot_idx += 1)
{
U64 stripe_idx = slot_idx%dasm_shared->stripes_count;
@@ -659,6 +671,13 @@ dasm_evictor_thread__entry_point(void *p)
slot_has_work = 1;
break;
}
if(n->change_gen != 0 && n->change_gen != change_gen &&
n->last_time_requested_us+retry_threshold_us <= check_time_us &&
n->last_user_clock_idx_requested+retry_threshold_user_clocks <= check_time_user_clocks)
{
slot_has_work = 1;
break;
}
}
}
if(slot_has_work) OS_MutexScopeW(stripe->rw_mutex)
@@ -679,10 +698,19 @@ dasm_evictor_thread__entry_point(void *p)
}
SLLStackPush(stripe->free_node, n);
}
if(n->change_gen != 0 && n->change_gen != change_gen &&
n->last_time_requested_us+retry_threshold_us <= check_time_us &&
n->last_user_clock_idx_requested+retry_threshold_user_clocks <= check_time_user_clocks)
{
if(dasm_u2p_enqueue_req(n->hash, &n->params, max_U64))
{
n->last_time_requested_us = os_now_microseconds();
n->last_user_clock_idx_requested = check_time_user_clocks;
}
}
}
}
os_sleep_milliseconds(5);
}
os_sleep_milliseconds(1000);
os_sleep_milliseconds(100);
}
}
src/dasm_cache/dasm_cache.h
+9 -4
View File
@@ -99,6 +99,9 @@ struct DASM_Node
U128 hash;
DASM_Params params;
// rjf: generations
U64 change_gen;
// rjf: value
Arena *info_arena;
DASM_Info info;
@@ -109,6 +112,8 @@ struct DASM_Node
U64 last_time_touched_us;
U64 last_user_clock_idx_touched;
U64 load_count;
U64 last_time_requested_us;
U64 last_user_clock_idx_requested;
};
typedef struct DASM_Slot DASM_Slot;
@@ -184,8 +189,8 @@ struct DASM_Shared
U64 parse_thread_count;
OS_Handle *parse_threads;
// rjf: evictor thread
OS_Handle evictor_thread;
// rjf: evictor/detector thread
OS_Handle evictor_detector_thread;
};
////////////////////////////////
@@ -239,8 +244,8 @@ internal void dasm_u2p_dequeue_req(Arena *arena, U128 *hash_out, DASM_Params *pa
internal void dasm_parse_thread__entry_point(void *p);
////////////////////////////////
//~ rjf: Evictor Threads
//~ rjf: Evictor/Detector Thread
internal void dasm_evictor_thread__entry_point(void *p);
internal void dasm_evictor_detector_thread__entry_point(void *p);
#endif // DASM_CACHE_H