[PATCH v8 07/10] config: make `delta_base_cache_limit` a non-global variable
- From
Karthik Nayak <karthik.188@gmail.com>
- Date
- Nov 22, 2024, 10:08 UTC
- Message-ID
- <d1b6e8801bb7edc9ce55bb50a5d46f9779906ad1.1732269840.git.karthik.188@gmail.com>
- In-Reply-To
- <cover.1732269840.git.karthik.188@gmail.com>
The `delta_base_cache_limit` variable is a global config variable used by multiple subsystems. Let's make this non-global, by adding this variable independently to the subsystems where it is used.
First, add the setting to the `repo_settings` struct, this provides access to the config in places where the repository is available. Use this in `packfile.c`.
In `index-pack.c` we add it to the `pack_idx_option` struct and its constructor. While the repository struct is available here, it may not be set because `git index-pack` can be used without a repository.
In `gc.c` add it to the `gc_config` struct and also the constructor function. The gc functions currently do not have direct access to a repository struct.
These changes are made to remove the usage of `delta_base_cache_limit` as a global variable in `packfile.c`. This brings us one step closer to removing the `USE_THE_REPOSITORY_VARIABLE` definition in `packfile.c` which we complete in the next patch.
Signed-off-by: Karthik Nayak <karthik.188@gmail.com> --- builtin/gc.c | 8 +++++++- builtin/index-pack.c | 10 +++++++--- config.c | 5 ----- environment.c | 1 - environment.h | 1 - pack-objects.h | 3 ++- pack-write.c | 1 + pack.h | 2 ++ packfile.c | 10 ++++++++-- repo-settings.c | 5 +++++ repo-settings.h | 3 +++ 11 files changed, 35 insertions(+), 14 deletions(-)
diff --git a/builtin/gc.c b/builtin/gc.c index d52735354c..09802eb989 100644 --- a/builtin/gc.c +++ b/builtin/gc.c @@ -138,6 +138,7 @@ struct gc_config { char *repack_filter_to; unsigned long big_pack_threshold; unsigned long max_delta_cache_size; + size_t delta_base_cache_limit; }; #define GC_CONFIG_INIT { \ @@ -153,6 +154,7 @@ struct gc_config { .prune_expire = xstrdup("2.weeks.ago"), \ .prune_worktrees_expire = xstrdup("3.months.ago"), \ .max_delta_cache_size = DEFAULT_DELTA_CACHE_SIZE, \ + .delta_base_cache_limit = DEFAULT_DELTA_BASE_CACHE_LIMIT, \ } static void gc_config_release(struct gc_config *cfg) @@ -168,6 +170,7 @@ static void gc_config(struct gc_config *cfg) { const char *value; char *owned = NULL; + unsigned long ulongval; if (!git_config_get_value("gc.packrefs", &value)) { if (value && !strcmp(value, "notbare")) @@ -206,6 +209,9 @@ static void gc_config(struct gc_config *cfg) git_config_get_ulong("gc.bigpackthreshold", &cfg->big_pack_threshold); git_config_get_ulong("pack.deltacachesize", &cfg->max_delta_cache_size); + if (!git_config_get_ulong("core.deltabasecachelimit", &ulongval)) + cfg->delta_base_cache_limit = ulongval; + if (!git_config_get_string("gc.repackfilter", &owned)) { free(cfg->repack_filter); cfg->repack_filter = owned; @@ -416,7 +422,7 @@ static uint64_t estimate_repack_memory(struct gc_config *cfg, * read_sha1_file() (either at delta calculation phase, or * writing phase) also fills up the delta base cache */ - heap += delta_base_cache_limit; + heap += cfg->delta_base_cache_limit; /* and of course pack-objects has its own delta cache */ heap += cfg->max_delta_cache_size; diff --git a/builtin/index-pack.c b/builtin/index-pack.c index eaefb41761..23bfa45403 100644 --- a/builtin/index-pack.c +++ b/builtin/index-pack.c @@ -1238,7 +1238,7 @@ static void parse_pack_objects(unsigned char *hash) * recursively checking if the resulting object is used as a base * for some more deltas. */ -static void resolve_deltas(void) +static void resolve_deltas(struct pack_idx_option *opts) { int i; @@ -1254,7 +1254,7 @@ static void resolve_deltas(void) nr_ref_deltas + nr_ofs_deltas); nr_dispatched = 0; - base_cache_limit = delta_base_cache_limit * nr_threads; + base_cache_limit = opts->delta_base_cache_limit * nr_threads; if (nr_threads > 1 || getenv("GIT_FORCE_THREADS")) { init_thread(); work_lock(); @@ -1604,6 +1604,10 @@ static int git_index_pack_config(const char *k, const char *v, else opts->flags &= ~WRITE_REV; } + if (!strcmp(k, "core.deltabasecachelimit")) { + opts->delta_base_cache_limit = git_config_ulong(k, v, ctx->kvi); + return 0; + } return git_default_config(k, v, ctx, cb); } @@ -1930,7 +1934,7 @@ int cmd_index_pack(int argc, parse_pack_objects(pack_hash); if (report_end_of_input) write_in_full(2, "\0", 1); - resolve_deltas(); + resolve_deltas(&opts); conclude_pack(fix_thin_pack, curr_pack, pack_hash); free(ofs_deltas); free(ref_deltas); diff --git a/config.c b/config.c index a11bb85da3..728ef98e42 100644 --- a/config.c +++ b/config.c @@ -1515,11 +1515,6 @@ static int git_default_core_config(const char *var, const char *value, return 0; } - if (!strcmp(var, "core.deltabasecachelimit")) { - delta_base_cache_limit = git_config_ulong(var, value, ctx->kvi); - return 0; - } - if (!strcmp(var, "core.autocrlf")) { if (value && !strcasecmp(value, "input")) { auto_crlf = AUTO_CRLF_INPUT; diff --git a/environment.c b/environment.c index a2ce998081..8e5022c282 100644 --- a/environment.c +++ b/environment.c @@ -51,7 +51,6 @@ enum fsync_method fsync_method = FSYNC_METHOD_DEFAULT; enum fsync_component fsync_components = FSYNC_COMPONENTS_DEFAULT; size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE; size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT; -size_t delta_base_cache_limit = 96 * 1024 * 1024; unsigned long big_file_threshold = 512 * 1024 * 1024; char *editor_program; char *askpass_program; diff --git a/environment.h b/environment.h index 923e12661e..2f43340f0b 100644 --- a/environment.h +++ b/environment.h @@ -165,7 +165,6 @@ extern int zlib_compression_level; extern int pack_compression_level; extern size_t packed_git_window_size; extern size_t packed_git_limit; -extern size_t delta_base_cache_limit; extern unsigned long big_file_threshold; extern unsigned long pack_size_limit_cfg; extern int max_allowed_tree_depth; diff --git a/pack-objects.h b/pack-objects.h index b9898a4e64..3f6f504203 100644 --- a/pack-objects.h +++ b/pack-objects.h @@ -7,7 +7,8 @@ struct repository; -#define DEFAULT_DELTA_CACHE_SIZE (256 * 1024 * 1024) +#define DEFAULT_DELTA_CACHE_SIZE (256 * 1024 * 1024) +#define DEFAULT_DELTA_BASE_CACHE_LIMIT (96 * 1024 * 1024) #define OE_DFS_STATE_BITS 2 #define OE_DEPTH_BITS 12 diff --git a/pack-write.c b/pack-write.c index 8c7dfddc5a..98a8c0e785 100644 --- a/pack-write.c +++ b/pack-write.c @@ -21,6 +21,7 @@ void reset_pack_idx_option(struct pack_idx_option *opts) memset(opts, 0, sizeof(*opts)); opts->version = 2; opts->off32_limit = 0x7fffffff; + opts->delta_base_cache_limit = DEFAULT_DELTA_BASE_CACHE_LIMIT; } static int sha1_compare(const void *_a, const void *_b) diff --git a/pack.h b/pack.h index 02bbdfb19c..a8da040629 100644 --- a/pack.h +++ b/pack.h @@ -58,6 +58,8 @@ struct pack_idx_option { */ int anomaly_alloc, anomaly_nr; uint32_t *anomaly; + + size_t delta_base_cache_limit; }; void reset_pack_idx_option(struct pack_idx_option *); diff --git a/packfile.c b/packfile.c index 5e8019b1fe..64248ca664 100644 --- a/packfile.c +++ b/packfile.c @@ -1496,7 +1496,9 @@ void clear_delta_base_cache(void) } static void add_delta_base_cache(struct packed_git *p, off_t base_offset, - void *base, unsigned long base_size, enum object_type type) + void *base, unsigned long base_size, + unsigned long delta_base_cache_limit, + enum object_type type) { struct delta_base_cache_entry *ent; struct list_head *lru, *tmp; @@ -1698,6 +1700,8 @@ void *unpack_entry(struct repository *r, struct packed_git *p, off_t obj_offset, int delta_stack_nr = 0, delta_stack_alloc = UNPACK_ENTRY_STACK_PREALLOC; int base_from_cache = 0; + prepare_repo_settings(p->repo); + write_pack_access_log(p, obj_offset); /* PHASE 1: drill down to the innermost base object */ @@ -1878,7 +1882,9 @@ void *unpack_entry(struct repository *r, struct packed_git *p, off_t obj_offset, * before we are done using it. */ if (!external_base) - add_delta_base_cache(p, base_obj_offset, base, base_size, type); + add_delta_base_cache(p, base_obj_offset, base, base_size, + p->repo->settings.delta_base_cache_limit, + type); free(delta_data); free(external_base); diff --git a/repo-settings.c b/repo-settings.c index 4699b4b365..acc27eb8fe 100644 --- a/repo-settings.c +++ b/repo-settings.c @@ -3,6 +3,7 @@ #include "repo-settings.h" #include "repository.h" #include "midx.h" +#include "pack-objects.h" static void repo_cfg_bool(struct repository *r, const char *key, int *dest, int def) @@ -26,6 +27,7 @@ void prepare_repo_settings(struct repository *r) const char *strval; int manyfiles; int read_changed_paths; + unsigned long ulongval; if (!r->gitdir) BUG("Cannot add settings for uninitialized repository"); @@ -123,6 +125,9 @@ void prepare_repo_settings(struct repository *r) * removed. */ r->settings.command_requires_full_index = 1; + + if (!repo_config_get_ulong(r, "core.deltabasecachelimit", &ulongval)) + r->settings.delta_base_cache_limit = ulongval; } enum log_refs_config repo_settings_get_log_all_ref_updates(struct repository *repo) diff --git a/repo-settings.h b/repo-settings.h index 51d6156a11..10a6f7ed64 100644 --- a/repo-settings.h +++ b/repo-settings.h @@ -57,12 +57,15 @@ struct repo_settings { int core_multi_pack_index; int warn_ambiguous_refs; /* lazily loaded via accessor */ + + size_t delta_base_cache_limit; }; #define REPO_SETTINGS_INIT { \ .index_version = -1, \ .core_untracked_cache = UNTRACKED_CACHE_KEEP, \ .fetch_negotiation_algorithm = FETCH_NEGOTIATION_CONSECUTIVE, \ .warn_ambiguous_refs = -1, \ + .delta_base_cache_limit = DEFAULT_DELTA_BASE_CACHE_LIMIT, \ } void prepare_repo_settings(struct repository *r);
-- 2.47.0