search for: xtime_nsec

...time[clk & VGTOD_HRES_MASK]; u64 cycles, last, ns; unsigned int seq; --- a/arch/x86/entry/vsyscall/vsyscall_gtod.c +++ b/arch/x86/entry/vsyscall/vsyscall_gtod.c @@ -51,6 +51,10 @@ void update_vsyscall(struct timekeeper * base->sec = tk->xtime_sec; base->nsec = tk->tkr_mono.xtime_nsec; + base = &vdata->basetime[VGTOD_TAI]; + base->sec = tk->xtime_sec + (s64)tk->tai_offset; + base->nsec = tk->tkr_mono.xtime_nsec; + base = &vdata->basetime[CLOCK_MONOTONIC]; base->sec = tk->xtime_sec + tk->wall_to_monotonic.tv_sec; nsec = tk->tkr_mon...

Matt attempted to add CLOCK_TAI support to the VDSO clock_gettime() implementation, which extended the clockid switch case and added yet another slightly different copy of the same code. Especially the extended switch case is problematic as the compiler tends to generate a jump table which then requires to use retpolines. If jump tables are disabled it adds yet another conditional to the existing

...4 cycles, last, ns; > unsigned int seq; > > --- a/arch/x86/entry/vsyscall/vsyscall_gtod.c > +++ b/arch/x86/entry/vsyscall/vsyscall_gtod.c > @@ -51,6 +51,10 @@ void update_vsyscall(struct timekeeper * > base->sec = tk->xtime_sec; > base->nsec = tk->tkr_mono.xtime_nsec; > > + base = &vdata->basetime[VGTOD_TAI]; > + base->sec = tk->xtime_sec + (s64)tk->tai_offset; > + base->nsec = tk->tkr_mono.xtime_nsec; > + > base = &vdata->basetime[CLOCK_MONOTONIC]; > base->sec = tk->xtime_sec + tk->wall...

...4 cycles, last, ns; > unsigned int seq; > > --- a/arch/x86/entry/vsyscall/vsyscall_gtod.c > +++ b/arch/x86/entry/vsyscall/vsyscall_gtod.c > @@ -51,6 +51,10 @@ void update_vsyscall(struct timekeeper * > base->sec = tk->xtime_sec; > base->nsec = tk->tkr_mono.xtime_nsec; > > + base = &vdata->basetime[VGTOD_TAI]; > + base->sec = tk->xtime_sec + (s64)tk->tai_offset; > + base->nsec = tk->tkr_mono.xtime_nsec; > + > base = &vdata->basetime[CLOCK_MONOTONIC]; > base->sec = tk->xtime_sec + tk->wall...

On Sun, Jul 22, 2012 at 03:34:42PM +0200, Ingo Molnar wrote: > Linus, > > Please pull the latest timers-core-for-linus git tree from: > > git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers-core-for-linus > > HEAD: eec19d1a0d04c80e66eef634f7b8f460f2ca5643 Merge branch ''linus'' into timers/core > > Continued cleanups of the core

..., cycle_t offset, - u32 shift) + u32 shift, unsigned int *action) { cycle_t interval = tk->cycle_interval << shift; u64 raw_nsecs; @@ -1309,7 +1309,7 @@ static cycle_t logarithmic_accumulation(struct timekeeper *tk, cycle_t offset, tk->cycle_last += interval; tk->xtime_nsec += tk->xtime_interval << shift; - accumulate_nsecs_to_secs(tk); + *action |= accumulate_nsecs_to_secs(tk); /* Accumulate raw time */ raw_nsecs = (u64)tk->raw_interval << shift; @@ -1367,7 +1367,7 @@ static void update_wall_time(void) struct timekeeper *tk = &shadow_tim...

Matt attempted to add CLOCK_TAI support to the VDSO clock_gettime() implementation, which extended the clockid switch case and added yet another slightly different copy of the same code. Especially the extended switch case is problematic as the compiler tends to generate a jump table which then requires to use retpolines. If jump tables are disabled it adds yet another conditional to the existing

Matt attempted to add CLOCK_TAI support to the VDSO clock_gettime() implementation, which extended the clockid switch case and added yet another slightly different copy of the same code. Especially the extended switch case is problematic as the compiler tends to generate a jump table which then requires to use retpolines. If jump tables are disabled it adds yet another conditional to the existing

...eeper *tk, cycle_t offset, - u32 shift) + u32 shift, int *action) { cycle_t interval = tk->cycle_interval << shift; u64 raw_nsecs; @@ -1311,7 +1311,7 @@ static cycle_t logarithmic_accumulation(struct timekeeper *tk, cycle_t offset, tk->cycle_last += interval; tk->xtime_nsec += tk->xtime_interval << shift; - accumulate_nsecs_to_secs(tk); + *action |= accumulate_nsecs_to_secs(tk); /* Accumulate raw time */ raw_nsecs = (u64)tk->raw_interval << shift; @@ -1369,7 +1369,7 @@ static void update_wall_time(void) struct timekeeper *tk = &shadow_tim...

From: David Vrabel <david.vrabel@citrix.com> The high resolution timer code gets notified of step changes to the system time with clock_was_set() or clock_was_set_delayed() calls. If other parts of the kernel require similar notification there is no clear place to hook into. Add a clock_was_set atomic notifier chain (clock_was_set_notifier_list) and call this in place of clock_was_set().

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths