Author: hauke Date: 2016-01-24 00:48:55 +0100 (Sun, 24 Jan 2016) New Revision: 48466
Added: trunk/toolchain/musl/patches/030-mips-add-vdso-support.patch Log: musl: mips: add vdso support vdso support is available on mips starting with kernel 4.4, see kernel commit a7f4df4e21 "MIPS: VDSO: Add implementations of gettimeofday() and clock_gettime()" for details. These are my micro benchmark results for 1.000.000 calls to clock_gettime(CLOCK_MONOTONIC, &tp) without vdso: root@OpenWrt:/# time ./vdso-test real 0m 0.95s user 0m 0.24s sys 0m 0.70s with vdso: root@OpenWrt:/# time /usr/bin/vdso-test real 0m 0.35s user 0m 0.34s sys 0m 0.00s Signed-off-by: Hauke Mehrtens <[email protected]> Added: trunk/toolchain/musl/patches/030-mips-add-vdso-support.patch =================================================================== --- trunk/toolchain/musl/patches/030-mips-add-vdso-support.patch (rev 0) +++ trunk/toolchain/musl/patches/030-mips-add-vdso-support.patch 2016-01-23 23:48:55 UTC (rev 48466) @@ -0,0 +1,29 @@ +From c29a29c3334344e0f3cfdec6130a6261514507a0 Mon Sep 17 00:00:00 2001 +From: Hauke Mehrtens <[email protected]> +Date: Sat, 23 Jan 2016 16:23:09 +0100 +Subject: [PATCH 2/2] mips: add vdso support + +vdso support is available on mips starting with kernel 4.4, see kernel +commit a7f4df4e21 "MIPS: VDSO: Add implementations of gettimeofday() +and clock_gettime()" for details. + +Signed-off-by: Hauke Mehrtens <[email protected]> +--- + arch/mips/syscall_arch.h | 4 ++++ + 1 file changed, 4 insertions(+) + +diff --git a/arch/mips/syscall_arch.h b/arch/mips/syscall_arch.h +index e74e0ad..39c0ea3 100644 +--- a/arch/mips/syscall_arch.h ++++ b/arch/mips/syscall_arch.h +@@ -161,3 +161,7 @@ static inline long __syscall6(long n, long a, long b, long c, long d, long e, lo + if (n == SYS_fstatat) __stat_fix(c); + return r2; + } ++ ++#define VDSO_USEFUL ++#define VDSO_CGT_SYM "__vdso_clock_gettime" ++#define VDSO_CGT_VER "LINUX_2.6" +-- +2.7.0.rc3 + _______________________________________________ openwrt-commits mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-commits
