diff options
| -rw-r--r-- | Documentation/git.txt | 7 | ||||
| -rw-r--r-- | cache.h | 3 | ||||
| -rw-r--r-- | config.c | 3 | ||||
| -rw-r--r-- | environment.c | 1 | ||||
| -rw-r--r-- | sha1_file.c | 14 |
5 files changed, 19 insertions, 9 deletions
diff --git a/Documentation/git.txt b/Documentation/git.txt index 9e302b0a60..3e74440a18 100644 --- a/Documentation/git.txt +++ b/Documentation/git.txt @@ -832,6 +832,13 @@ for further details. as a file path and will try to write the trace messages into it. +'GIT_TRACE_PACK_ACCESS':: + If this variable is set to a path, a file will be created at + the given path logging all accesses to any packs. For each + access, the pack file name and an offset in the pack is + recorded. This may be helpful for troubleshooting some + pack-related performance problems. + GIT_LITERAL_PATHSPECS:: Setting this variable to `1` will cause Git to treat all pathspecs literally, rather than as glob patterns. For example, @@ -772,9 +772,6 @@ extern int parse_sha1_header(const char *hdr, unsigned long *sizep); /* global flag to enable extra checks when accessing packed objects */ extern int do_check_packed_object_crc; -/* for development: log offset of pack access */ -extern const char *log_pack_access; - extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type); extern int move_temp_to_file(const char *tmpfile, const char *filename); @@ -675,9 +675,6 @@ static int git_default_core_config(const char *var, const char *value) return 0; } - if (!strcmp(var, "core.logpackaccess")) - return git_config_string(&log_pack_access, var, value); - if (!strcmp(var, "core.autocrlf")) { if (value && !strcasecmp(value, "input")) { if (core_eol == EOL_CRLF) diff --git a/environment.c b/environment.c index e2e75c1660..0cb67b22cf 100644 --- a/environment.c +++ b/environment.c @@ -37,7 +37,6 @@ 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 = 16 * 1024 * 1024; unsigned long big_file_threshold = 512 * 1024 * 1024; -const char *log_pack_access; const char *pager_program; int pager_use_color = 1; const char *editor_program; diff --git a/sha1_file.c b/sha1_file.c index 67e815b2db..7fa62c2d93 100644 --- a/sha1_file.c +++ b/sha1_file.c @@ -36,6 +36,9 @@ static inline uintmax_t sz_fmt(size_t s) { return s; } const unsigned char null_sha1[20]; +static const char *no_log_pack_access = "no_log_pack_access"; +static const char *log_pack_access; + /* * This is meant to hold a *small* number of objects that you would * want read_sha1_file() to be able to return, but yet you do not want @@ -1956,12 +1959,19 @@ static void write_pack_access_log(struct packed_git *p, off_t obj_offset) { static FILE *log_file; + if (!log_pack_access) + log_pack_access = getenv("GIT_TRACE_PACK_ACCESS"); + if (!log_pack_access) + log_pack_access = no_log_pack_access; + if (log_pack_access == no_log_pack_access) + return; + if (!log_file) { log_file = fopen(log_pack_access, "w"); if (!log_file) { error("cannot open pack access log '%s' for writing: %s", log_pack_access, strerror(errno)); - log_pack_access = NULL; + log_pack_access = no_log_pack_access; return; } } @@ -1992,7 +2002,7 @@ void *unpack_entry(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; - if (log_pack_access) + if (log_pack_access != no_log_pack_access) write_pack_access_log(p, obj_offset); /* PHASE 1: drill down to the innermost base object */ |