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| author | Simon Glass <sjg@chromium.org> | 2015-10-18 15:55:36 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-10-21 07:46:51 -0600 |
| commit | fd8f4729ac6520e59dd1d3f57d503d8abe345ac5 (patch) | |
| tree | 3be919d96966c805b4b217c25ee28200b2c47cb0 | |
| parent | e9b3967c0c8faefb46213d6698c4bc21bf91598a (diff) | |
| download | u-boot-imx-fd8f4729ac6520e59dd1d3f57d503d8abe345ac5.zip u-boot-imx-fd8f4729ac6520e59dd1d3f57d503d8abe345ac5.tar.gz u-boot-imx-fd8f4729ac6520e59dd1d3f57d503d8abe345ac5.tar.bz2 | |
x86: ivybridge: Measure the MRC code execution time
This code takes about 450ms without the MRC cache and about 27ms with the
cache. Add a debug timer so that this time can be displayed.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
| -rw-r--r-- | arch/x86/cpu/ivybridge/sdram.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/cpu/ivybridge/sdram.c b/arch/x86/cpu/ivybridge/sdram.c index e637909..d9b3dfc 100644 --- a/arch/x86/cpu/ivybridge/sdram.c +++ b/arch/x86/cpu/ivybridge/sdram.c @@ -336,9 +336,11 @@ int sdram_initialise(struct pei_data *pei_data) if (data) { int rv; int (*func)(struct pei_data *); + ulong start; debug("Calling MRC at %p\n", data); post_code(POST_PRE_MRC); + start = get_timer(0); func = (int (*)(struct pei_data *))data; rv = func(pei_data); post_code(POST_MRC); @@ -356,6 +358,7 @@ int sdram_initialise(struct pei_data *pei_data) printf("Nonzero MRC return value.\n"); return -EFAULT; } + debug("MRC execution time %lu ms\n", get_timer(start)); } else { printf("UEFI PEI System Agent not found.\n"); return -ENOSYS; |