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| author | Heiko Schocher <hs@denx.de> | 2013-12-19 13:45:04 +0100 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2014-01-14 09:01:06 -0500 |
| commit | 1b6102718bc5514cf974abeecebebe95c6a9ecc6 (patch) | |
| tree | 2ebd35092871e6f5dce93498d9ad8e0899848aa3 /common/env_flags.c | |
| parent | a113fb39df43546c704aa8eba55720da9a9dfedd (diff) | |
| download | u-boot-1b6102718bc5514cf974abeecebebe95c6a9ecc6.tar.gz u-boot-1b6102718bc5514cf974abeecebebe95c6a9ecc6.tar.bz2 u-boot-1b6102718bc5514cf974abeecebebe95c6a9ecc6.zip | |
common, env: optimize boottime
when creating the hashtable, for each environmentvariable
getenv(ENV_CALLBACK_VAR) and getenv(ENV_FLAGS_VAR) is called,
which costs at this point a lot of time. So call this two
getenv() calls only once.
Boottime on the ids8313 board without this patch:
2013-12-19 13:38:22,894: NAND: 128 MiB
2013-12-19 13:38:27,659: In: serial
(~4.8 sec)
Bootime with this patch on the ids8313 board:
2013-12-19 13:40:25,332: NAND: 128 MiB
2013-12-19 13:40:25,546: In: serial
(~0.2 sec)
Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Tom Rini <trini@ti.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Wolfgang Denk <wd@denx.de>
Diffstat (limited to 'common/env_flags.c')
| -rw-r--r-- | common/env_flags.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/common/env_flags.c b/common/env_flags.c index e9b72e60a9..985f92e50e 100644 --- a/common/env_flags.c +++ b/common/env_flags.c @@ -395,6 +395,9 @@ static int env_parse_flags_to_bin(const char *flags) return binflags; } +static int first_call = 1; +static const char *flags_list; + /* * Look for possible flags for a newly added variable * This is called specifically when the variable did not exist in the hash @@ -403,10 +406,13 @@ static int env_parse_flags_to_bin(const char *flags) void env_flags_init(ENTRY *var_entry) { const char *var_name = var_entry->key; - const char *flags_list = getenv(ENV_FLAGS_VAR); char flags[ENV_FLAGS_ATTR_MAX_LEN + 1] = ""; int ret = 1; + if (first_call) { + flags_list = getenv(ENV_FLAGS_VAR); + first_call = 0; + } /* look in the ".flags" and static for a reference to this variable */ ret = env_flags_lookup(flags_list, var_name, flags); |