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| author | Felix Fietkau <nbd@openwrt.org> | 2005-11-10 00:02:57 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2005-11-10 00:02:57 +0000 |
| commit | 8aa95b234a2b3ef5c502ac92cf0f2f797c9b6095 (patch) | |
| tree | 3f853e842ead8ea2f97731be6c1cfa947a877939 /openwrt/target | |
| parent | c8f1fc4777acf31f8c699663ec5bf0802baf024f (diff) | |
| download | mtk-20170518-8aa95b234a2b3ef5c502ac92cf0f2f797c9b6095.zip mtk-20170518-8aa95b234a2b3ef5c502ac92cf0f2f797c9b6095.tar.gz mtk-20170518-8aa95b234a2b3ef5c502ac92cf0f2f797c9b6095.tar.bz2 | |
add patch to allow packet schedulers to use the cpu TSC as time source (faster and more accurate)
SVN-Revision: 2402
Diffstat (limited to 'openwrt/target')
| -rw-r--r-- | openwrt/target/linux/linux-2.4/patches/brcm/006-sched_use_tsc.patch | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/openwrt/target/linux/linux-2.4/patches/brcm/006-sched_use_tsc.patch b/openwrt/target/linux/linux-2.4/patches/brcm/006-sched_use_tsc.patch new file mode 100644 index 0000000..047ae16 --- /dev/null +++ b/openwrt/target/linux/linux-2.4/patches/brcm/006-sched_use_tsc.patch @@ -0,0 +1,72 @@ +diff -urN linux.old/arch/mips/kernel/time.c linux.dev/arch/mips/kernel/time.c +--- linux.old/arch/mips/kernel/time.c 2005-01-19 15:09:29.000000000 +0100 ++++ linux.dev/arch/mips/kernel/time.c 2005-11-09 23:10:04.233756250 +0100 +@@ -151,6 +150,15 @@ + unsigned int (*mips_hpt_read)(void); + void (*mips_hpt_init)(unsigned int); + ++extern __u32 get_htscl(void) ++{ ++ return timerhi; ++} ++ ++extern __u64 get_tscll(void) ++{ ++ return (((__u64) timerhi) << 32) | ((__u64) ((__u32) read_c0_count())); ++} + + /* + * timeofday services, for syscalls. +@@ -761,3 +769,5 @@ + EXPORT_SYMBOL(to_tm); + EXPORT_SYMBOL(rtc_set_time); + EXPORT_SYMBOL(rtc_get_time); ++EXPORT_SYMBOL(get_htscl); ++EXPORT_SYMBOL(get_tscll); +diff -urN linux.old/include/asm-mips/timex.h linux.dev/include/asm-mips/timex.h +--- linux.old/include/asm-mips/timex.h 2003-08-25 13:44:44.000000000 +0200 ++++ linux.dev/include/asm-mips/timex.h 2005-11-09 22:15:59.352633250 +0100 +@@ -31,6 +31,19 @@ + return read_c0_count(); + } + ++extern __u32 get_htscl(void); ++extern __u64 get_tscll(void); ++ ++#define rdtsc(low, high) \ ++ high = get_htscl(); \ ++ low = read_c0_count(); ++ ++#define rdtscl(low) \ ++ low = read_c0_count(); ++ ++#define rdtscll(val) \ ++ val = get_tscll(); ++ + #define vxtime_lock() do {} while (0) + #define vxtime_unlock() do {} while (0) + +diff -urN linux.old/include/net/pkt_sched.h linux.dev/include/net/pkt_sched.h +--- linux.old/include/net/pkt_sched.h 2005-11-09 21:25:10.686721000 +0100 ++++ linux.dev/include/net/pkt_sched.h 2005-11-09 21:54:26.063807750 +0100 +@@ -5,7 +5,11 @@ + #define PSCHED_JIFFIES 2 + #define PSCHED_CPU 3 + ++#ifdef __mips__ ++#define PSCHED_CLOCK_SOURCE PSCHED_CPU ++#else + #define PSCHED_CLOCK_SOURCE PSCHED_JIFFIES ++#endif + + #include <linux/config.h> + #include <linux/types.h> +@@ -271,7 +275,7 @@ + #define PSCHED_US2JIFFIE(delay) (((delay)+psched_clock_per_hz-1)/psched_clock_per_hz) + #define PSCHED_JIFFIE2US(delay) ((delay)*psched_clock_per_hz) + +-#ifdef CONFIG_X86_TSC ++#if defined(CONFIG_X86_TSC) || defined(__mips__) + + #define PSCHED_GET_TIME(stamp) \ + ({ u64 __cur; \ |