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e7d344de01
Trace analysis of FVP_Base_AEMv8A model running in Aarch32 mode with the build options listed below: TRUSTED_BOARD_BOOT=1 GENERATE_COT=1 ARM_ROTPK_LOCATION=devel_ecdsa KEY_ALG=ecdsa ROT_KEY=plat/arm/board/common/rotpk/arm_rotprivk_ecdsa.pem shows that when auth_signature() gets called 71.84% of CPU execution time is spent in memset() function written in C using single byte write operations, see lib\libc\memset.c. This patch replaces C memset() implementation with assembler version giving the following results: - for Aarch32 in auth_signature() call memset() CPU time reduced to 24.84%. - Number of CPU instructions executed during TF-A boot stage before start of BL33 in RELEASE builds: ---------------------------------------------- | Arch | C | assembler | % | ---------------------------------------------- | Aarch32 | 2073275460 | 1487400003 | -28.25 | | Aarch64 | 2056807158 | 1244898303 | -39.47 | ---------------------------------------------- The patch also replaces memset.c with aarch64/memset.S in plat\nvidia\tegra\platform.mk. Change-Id: Ifbf085a2f577a25491e2d28446ee95a4ac891597 Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com> |
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| .. | ||
| aarch32 | ||
| aarch64 | ||
| abort.c | ||
| assert.c | ||
| exit.c | ||
| libc.mk | ||
| memchr.c | ||
| memcmp.c | ||
| memcpy.c | ||
| memmove.c | ||
| memrchr.c | ||
| printf.c | ||
| putchar.c | ||
| puts.c | ||
| snprintf.c | ||
| strchr.c | ||
| strcmp.c | ||
| strlcpy.c | ||
| strlen.c | ||
| strncmp.c | ||
| strnlen.c | ||
| strrchr.c | ||