search for: native_read_tsc

...t have a TSC at all, so there's no point > for a paravirt implementation to pretend that we have a TSC but to > replace it. > > I also doubt that these hooks actually worked. Calls to rdtscl and > rdtscll, which respected the hooks, were used seemingly > interchangeably with native_read_tsc, which did not. > > Just remove them. If anyone ever needs them again, they can try > to make a case for why they need them. > > Before, on a paravirt config: > text data bss dec hex filename > 13426505 1827056 14508032 29761593 1c62039 vmlinux > > A...

...t have a TSC at all, so there's no point > for a paravirt implementation to pretend that we have a TSC but to > replace it. > > I also doubt that these hooks actually worked. Calls to rdtscl and > rdtscll, which respected the hooks, were used seemingly > interchangeably with native_read_tsc, which did not. > > Just remove them. If anyone ever needs them again, they can try > to make a case for why they need them. > > Before, on a paravirt config: > text data bss dec hex filename > 13426505 1827056 14508032 29761593 1c62039 vmlinux > > A...

...ern void __init vmi_timer_setup_boot_alarm(void); diff -r b8b315c897bb arch/i386/kernel/paravirt.c --- a/arch/i386/kernel/paravirt.c Tue Feb 27 14:04:43 2007 -0800 +++ b/arch/i386/kernel/paravirt.c Tue Feb 27 14:08:59 2007 -0800 @@ -522,6 +522,7 @@ struct paravirt_ops paravirt_ops = { .read_tsc = native_read_tsc, .read_pmc = native_read_pmc, .get_scheduled_cycles = native_read_tsc, + .get_cpu_khz = native_calculate_cpu_khz, .load_tr_desc = native_load_tr_desc, .set_ldt = native_set_ldt, .load_gdt = native_load_gdt, diff -r b8b315c897bb arch/i386/kernel/tsc.c --- a/arch/i386/kernel/tsc.c Tue Feb 2...

...ern void __init vmi_timer_setup_boot_alarm(void); diff -r b8b315c897bb arch/i386/kernel/paravirt.c --- a/arch/i386/kernel/paravirt.c Tue Feb 27 14:04:43 2007 -0800 +++ b/arch/i386/kernel/paravirt.c Tue Feb 27 14:08:59 2007 -0800 @@ -522,6 +522,7 @@ struct paravirt_ops paravirt_ops = { .read_tsc = native_read_tsc, .read_pmc = native_read_pmc, .get_scheduled_cycles = native_read_tsc, + .get_cpu_khz = native_calculate_cpu_khz, .load_tr_desc = native_load_tr_desc, .set_ldt = native_set_ldt, .load_gdt = native_load_gdt, diff -r b8b315c897bb arch/i386/kernel/tsc.c --- a/arch/i386/kernel/tsc.c Tue Feb 2...

Lguest currently requires a TSC, which breaks older machines and Matt Mackall who boots the host with "notsc". In addition, there is no good solution to changing TSC speeds (informing all the guests about the TSC impending change before it happens would be a great deal of code and have issues with disobedient guests). This patch makes the host determine if the TSC is both constant and

Lguest currently requires a TSC, which breaks older machines and Matt Mackall who boots the host with "notsc". In addition, there is no good solution to changing TSC speeds (informing all the guests about the TSC impending change before it happens would be a great deal of code and have issues with disobedient guests). This patch makes the host determine if the TSC is both constant and

...-0800 @@ -32,6 +32,7 @@ #include <asm/fixmap.h> #include <asm/apic.h> #include <asm/tlbflush.h> +#include <asm/timer.h> /* nop stub */ static void native_nop(void) @@ -520,6 +521,7 @@ struct paravirt_ops paravirt_ops = { .write_msr = native_write_msr, .read_tsc = native_read_tsc, .read_pmc = native_read_pmc, + .get_scheduled_cycles = native_read_tsc, .load_tr_desc = native_load_tr_desc, .set_ldt = native_set_ldt, .load_gdt = native_load_gdt, diff -r d58e6ddfdfa9 arch/i386/kernel/tsc.c --- a/arch/i386/kernel/tsc.c Thu Feb 15 23:52:41 2007 -0800 +++ b/arch/i386/kerne...

...-0800 @@ -32,6 +32,7 @@ #include <asm/fixmap.h> #include <asm/apic.h> #include <asm/tlbflush.h> +#include <asm/timer.h> /* nop stub */ static void native_nop(void) @@ -520,6 +521,7 @@ struct paravirt_ops paravirt_ops = { .write_msr = native_write_msr, .read_tsc = native_read_tsc, .read_pmc = native_read_pmc, + .get_scheduled_cycles = native_read_tsc, .load_tr_desc = native_load_tr_desc, .set_ldt = native_set_ldt, .load_gdt = native_load_gdt, diff -r d58e6ddfdfa9 arch/i386/kernel/tsc.c --- a/arch/i386/kernel/tsc.c Thu Feb 15 23:52:41 2007 -0800 +++ b/arch/i386/kerne...

...2 +- 7 files changed, 57 insertions(+), 17 deletions(-) =================================================================== --- a/arch/i386/kernel/paravirt.c +++ b/arch/i386/kernel/paravirt.c @@ -552,7 +552,7 @@ struct paravirt_ops paravirt_ops = { .write_msr = native_write_msr, .read_tsc = native_read_tsc, .read_pmc = native_read_pmc, - .get_scheduled_cycles = native_read_tsc, + .sched_clock = native_sched_clock, .get_cpu_khz = native_calculate_cpu_khz, .load_tr_desc = native_load_tr_desc, .set_ldt = native_set_ldt, =================================================================== --- a/ar...

...2 +- 7 files changed, 57 insertions(+), 17 deletions(-) =================================================================== --- a/arch/i386/kernel/paravirt.c +++ b/arch/i386/kernel/paravirt.c @@ -552,7 +552,7 @@ struct paravirt_ops paravirt_ops = { .write_msr = native_write_msr, .read_tsc = native_read_tsc, .read_pmc = native_read_pmc, - .get_scheduled_cycles = native_read_tsc, + .sched_clock = native_sched_clock, .get_cpu_khz = native_calculate_cpu_khz, .load_tr_desc = native_load_tr_desc, .set_ldt = native_set_ldt, =================================================================== --- a/ar...

Respin of the paravirt clock patch series. On the host side the kvm paravirt clock is made compatible with the xen clock. On the guest side some xen code has been factored out into a separate source file shared by both kvm and xen clock implementations. This time it should work ok for kvm smp guests ;) cheers, Gerd

Respin of the paravirt clock patch series. On the host side the kvm paravirt clock is made compatible with the xen clock. On the guest side some xen code has been factored out into a separate source file shared by both kvm and xen clock implementations. This time it should work ok for kvm smp guests ;) cheers, Gerd

paravirt clock source patches, next round, with a bunch of changes in the host code according to Avi's review comments and some minor code tweaks. cheers, Gerd

paravirt clock source patches, next round, with a bunch of changes in the host code according to Avi's review comments and some minor code tweaks. cheers, Gerd

paravirt clock source patches, next round. There is now a pvclock-abi.h file with the structs and some longish comments in it and everybody is switched over to use the stuff in there. Some minor tweaks after super-fast review by Jeremy. The queue is on top of the kvm git tree. The first two patches should have no kvm dependencies and should apply to linus tree just fine. cheers, Gerd

paravirt clock source patches, next round. There is now a pvclock-abi.h file with the structs and some longish comments in it and everybody is switched over to use the stuff in there. Some minor tweaks after super-fast review by Jeremy. The queue is on top of the kvm git tree. The first two patches should have no kvm dependencies and should apply to linus tree just fine. cheers, Gerd

paravirt clock source patches, next round. There is now a pvclock-abi.h file with the structs and some longish comments in it and everybody is switched over to use the stuff in there. cheers, Gerd

paravirt clock source patches, next round. There is now a pvclock-abi.h file with the structs and some longish comments in it and everybody is switched over to use the stuff in there. cheers, Gerd

...345,24 @@ static void __init lguest_init_IRQ(void) static unsigned long lguest_get_wallclock(void) { - return hcall(LHCALL_GET_WALLCLOCK, 0, 0, 0); + return lguest_data.time.tv_sec; } static cycle_t lguest_clock_read(void) { + unsigned long sec, nsec; + if (lguest_data.tsc_khz) return native_read_tsc(); - else - return jiffies; + + /* Standard loop to make sure we get matching seconds & nanoseconds */ + do { + sec = lguest_data.time.tv_sec; + rmb(); + nsec = lguest_data.time.tv_nsec; + rmb(); + } while (unlikely(lguest_data.time.tv_sec != sec)); + return sec*1000000000ULL + nsec; }...

...345,24 @@ static void __init lguest_init_IRQ(void) static unsigned long lguest_get_wallclock(void) { - return hcall(LHCALL_GET_WALLCLOCK, 0, 0, 0); + return lguest_data.time.tv_sec; } static cycle_t lguest_clock_read(void) { + unsigned long sec, nsec; + if (lguest_data.tsc_khz) return native_read_tsc(); - else - return jiffies; + + /* Standard loop to make sure we get matching seconds & nanoseconds */ + do { + sec = lguest_data.time.tv_sec; + rmb(); + nsec = lguest_data.time.tv_nsec; + rmb(); + } while (unlikely(lguest_data.time.tv_sec != sec)); + return sec*1000000000ULL + nsec; }...