search for: paravirt_read_pmc

...ons(+) >> >> diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h >> index 9ccac19..6d46760 100644 >> --- a/arch/x86/include/asm/paravirt.h >> +++ b/arch/x86/include/asm/paravirt.h >> @@ -202,6 +202,11 @@ static inline unsigned long long paravirt_read_pmc(int counter) >> >> #define rdpmcl(counter, val) ((val) = paravirt_read_pmc(counter)) >> >> +static inline void paravirt_idle_poll(void) >> +{ >> + PVOP_VCALL0(pv_idle_ops.poll); >> +} >> + >> static inline void paravirt_alloc_ldt(struc...

...ons(+) >> >> diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h >> index 9ccac19..6d46760 100644 >> --- a/arch/x86/include/asm/paravirt.h >> +++ b/arch/x86/include/asm/paravirt.h >> @@ -202,6 +202,11 @@ static inline unsigned long long paravirt_read_pmc(int counter) >> >> #define rdpmcl(counter, val) ((val) = paravirt_read_pmc(counter)) >> >> +static inline void paravirt_idle_poll(void) >> +{ >> + PVOP_VCALL0(pv_idle_ops.poll); >> +} >> + >> static inline void paravirt_alloc_ldt(struc...

...6 ++++++ 3 files changed, 17 insertions(+), 0 deletions(-) diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h index fd81228..3c83727 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -198,6 +198,11 @@ static inline unsigned long long paravirt_read_pmc(int counter) #define rdpmcl(counter, val) ((val) = paravirt_read_pmc(counter)) +static inline void paravirt_idle_poll(void) +{ + PVOP_VCALL0(pv_idle_ops.poll); +} + static inline void paravirt_alloc_ldt(struct desc_struct *ldt, unsigned entries) { PVOP_VCALL2(pv_cpu_ops.alloc_ldt, ldt, ent...

...; - > -#define rdtscll(val) (val = paravirt_read_tsc()) > - > static inline unsigned long long paravirt_sched_clock(void) > { > return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock); > @@ -215,27 +202,6 @@ do { \ > > #define rdpmcl(counter, val) ((val) = paravirt_read_pmc(counter)) > > -static inline unsigned long long paravirt_rdtscp(unsigned int *aux) > -{ > - return PVOP_CALL1(u64, pv_cpu_ops.read_tscp, aux); > -} > - > -#define rdtscp(low, high, aux) \ > -do { \ > - int __aux; \ > - unsigned long __val = paravirt_rdts...

...; - > -#define rdtscll(val) (val = paravirt_read_tsc()) > - > static inline unsigned long long paravirt_sched_clock(void) > { > return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock); > @@ -215,27 +202,6 @@ do { \ > > #define rdpmcl(counter, val) ((val) = paravirt_read_pmc(counter)) > > -static inline unsigned long long paravirt_rdtscp(unsigned int *aux) > -{ > - return PVOP_CALL1(u64, pv_cpu_ops.read_tscp, aux); > -} > - > -#define rdtscp(low, high, aux) \ > -do { \ > - int __aux; \ > - unsigned long __val = paravirt_rdts...

From: Yang Zhang <yang.zhang.wz at gmail.com> Some latency-intensive workload have seen obviously performance drop when running inside VM. The main reason is that the overhead is amplified when running inside VM. The most cost I have seen is inside idle path. This patch introduces a new mechanism to poll for a while before entering idle state. If schedule is needed during poll, then we

From: Yang Zhang <yang.zhang.wz at gmail.com> Some latency-intensive workload have seen obviously performance drop when running inside VM. The main reason is that the overhead is amplified when running inside VM. The most cost I have seen is inside idle path. This patch introduces a new mechanism to poll for a while before entering idle state. If schedule is needed during poll, then we

Today paravirtualization is a all-or-nothing game: either a kernel is compiled with no paravirtualization support at all, or it is supporting paravirtualized environments like Xen pv-guests or lguest additionally to some paravirtualized tuning for KVM, Hyperv, VMWare or Xen HVM-guests. As support of pv-guests requires quite intrusive pv-hooks (e.g. all access functions to page table entries,

Today paravirtualization is a all-or-nothing game: either a kernel is compiled with no paravirtualization support at all, or it is supporting paravirtualized environments like Xen pv-guests or lguest additionally to some paravirtualized tuning for KVM, Hyperv, VMWare or Xen HVM-guests. As support of pv-guests requires quite intrusive pv-hooks (e.g. all access functions to page table entries,

This series removes some no longer needed stuff from paravirt infrastructure and puts large quantities of paravirt ops under a new config option PARAVIRT_XXL which is selected by XEN_PV only. A pvops kernel without XEN_PV being configured is about 2.5% smaller with this series applied. tip commit 5800dc5c19f34e6e03b5adab1282535cb102fafd ("x86/paravirt: Fix spectre-v2 mitigations for

Paravirt ops is currently only capable of either replacing a lot of Linux internal code or none at all. The are users that don't need all of the possibilities pv-ops delivers though. On KVM for example we're perfectly fine not using the PV MMU, thus not touching any MMU code. That way we don't have to improve pv-ops to become fast, we just don't compile the MMU parts in! This

Paravirt ops is currently only capable of either replacing a lot of Linux internal code or none at all. The are users that don't need all of the possibilities pv-ops delivers though. On KVM for example we're perfectly fine not using the PV MMU, thus not touching any MMU code. That way we don't have to improve pv-ops to become fast, we just don't compile the MMU parts in! This

This series removes some no longer needed stuff from paravirt infrastructure and puts large quantities of paravirt ops under a new config option PARAVIRT_XXL which is selected by XEN_PV only. A pvops kernel without XEN_PV being configured is about 2.5% smaller with this series applied. tip commit 5800dc5c19f34e6e03b5adab1282535cb102fafd ("x86/paravirt: Fix spectre-v2 mitigations for

...long, sched_clock); -} -#define calculate_cpu_khz() (paravirt_ops.get_cpu_khz()) + return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock); +} +#define calculate_cpu_khz() (pv_time_ops.get_cpu_khz()) #define write_tsc(val1,val2) wrmsr(0x10, val1, val2) static inline unsigned long long paravirt_read_pmc(int counter) { - return PVOP_CALL1(u64, read_pmc, counter); + return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter); } #define rdpmc(counter,low,high) do { \ @@ -591,61 +632,61 @@ static inline unsigned long long paravir static inline void load_TR_desc(void) { - PVOP_VCALL0(load_tr_desc);...

...long, sched_clock); -} -#define calculate_cpu_khz() (paravirt_ops.get_cpu_khz()) + return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock); +} +#define calculate_cpu_khz() (pv_time_ops.get_cpu_khz()) #define write_tsc(val1,val2) wrmsr(0x10, val1, val2) static inline unsigned long long paravirt_read_pmc(int counter) { - return PVOP_CALL1(u64, read_pmc, counter); + return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter); } #define rdpmc(counter,low,high) do { \ @@ -591,61 +632,61 @@ static inline unsigned long long paravir static inline void load_TR_desc(void) { - PVOP_VCALL0(load_tr_desc);...

...long, sched_clock); -} -#define calculate_cpu_khz() (paravirt_ops.get_cpu_khz()) + return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock); +} +#define calculate_cpu_khz() (pv_time_ops.get_cpu_khz()) #define write_tsc(val1,val2) wrmsr(0x10, val1, val2) static inline unsigned long long paravirt_read_pmc(int counter) { - return PVOP_CALL1(u64, read_pmc, counter); + return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter); } #define rdpmc(counter,low,high) do { \ @@ -591,61 +632,61 @@ static inline unsigned long long paravir static inline void load_TR_desc(void) { - PVOP_VCALL0(load_tr_desc);...

...long, sched_clock); -} -#define calculate_cpu_khz() (paravirt_ops.get_cpu_khz()) + return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock); +} +#define calculate_cpu_khz() (pv_time_ops.get_cpu_khz()) #define write_tsc(val1,val2) wrmsr(0x10, val1, val2) static inline unsigned long long paravirt_read_pmc(int counter) { - return PVOP_CALL1(u64, read_pmc, counter); + return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter); } #define rdpmc(counter,low,high) do { \ @@ -591,61 +632,61 @@ static inline unsigned long long paravir static inline void load_TR_desc(void) { - PVOP_VCALL0(load_tr_desc);...

Hi Andi, This series of patches updates paravirt_ops in various ways. Some of the changes are plain cleanups and improvements, and some add some interfaces necessary for Xen. The brief overview: add-MAINTAINERS.patch - obvious remove-CONFIG_DEBUG_PARAVIRT.patch - no longer needed paravirt-nop.patch - mark nop operations consistently paravirt-pte-accessors.patch - operations to pack/unpack

Hi Andi, This series of patches updates paravirt_ops in various ways. Some of the changes are plain cleanups and improvements, and some add some interfaces necessary for Xen. The brief overview: add-MAINTAINERS.patch - obvious remove-CONFIG_DEBUG_PARAVIRT.patch - no longer needed paravirt-nop.patch - mark nop operations consistently paravirt-pte-accessors.patch - operations to pack/unpack

...long, sched_clock); -} -#define calculate_cpu_khz() (paravirt_ops.get_cpu_khz()) + return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock); +} +#define calculate_cpu_khz() (pv_time_ops.get_cpu_khz()) #define write_tsc(val1,val2) wrmsr(0x10, val1, val2) static inline unsigned long long paravirt_read_pmc(int counter) { - return PVOP_CALL1(u64, read_pmc, counter); + return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter); } #define rdpmc(counter,low,high) do { \ @@ -587,61 +616,61 @@ static inline unsigned long long paravir static inline void load_TR_desc(void) { - PVOP_VCALL0(load_tr_desc);...