x86/vmware: Enable steal time accounting
Set paravirt_steal_rq_enabled if steal clock present. paravirt_steal_rq_enabled is used in sched/core.c to adjust task progress by offsetting stolen time. Use 'no-steal-acc' off switch (share same name with KVM) to disable steal time accounting. Signed-off-by: Alexey Makhalov <amakhalov@vmware.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20200323195707.31242-5-amakhalov@vmware.com
This commit is contained in:
parent
ab02bb3f55
commit
e73a8f38f8
|
@ -3174,7 +3174,7 @@
|
|||
[X86,PV_OPS] Disable paravirtualized VMware scheduler
|
||||
clock and use the default one.
|
||||
|
||||
no-steal-acc [X86,KVM,ARM64] Disable paravirtualized steal time
|
||||
no-steal-acc [X86,PV_OPS,ARM64] Disable paravirtualized steal time
|
||||
accounting. steal time is computed, but won't
|
||||
influence scheduler behaviour
|
||||
|
||||
|
|
|
@ -125,6 +125,7 @@ static struct cyc2ns_data vmware_cyc2ns __ro_after_init;
|
|||
static int vmw_sched_clock __initdata = 1;
|
||||
static DEFINE_PER_CPU_DECRYPTED(struct vmware_steal_time, vmw_steal_time) __aligned(64);
|
||||
static bool has_steal_clock;
|
||||
static bool steal_acc __initdata = true; /* steal time accounting */
|
||||
|
||||
static __init int setup_vmw_sched_clock(char *s)
|
||||
{
|
||||
|
@ -133,6 +134,13 @@ static __init int setup_vmw_sched_clock(char *s)
|
|||
}
|
||||
early_param("no-vmw-sched-clock", setup_vmw_sched_clock);
|
||||
|
||||
static __init int parse_no_stealacc(char *arg)
|
||||
{
|
||||
steal_acc = false;
|
||||
return 0;
|
||||
}
|
||||
early_param("no-steal-acc", parse_no_stealacc);
|
||||
|
||||
static unsigned long long notrace vmware_sched_clock(void)
|
||||
{
|
||||
unsigned long long ns;
|
||||
|
@ -306,8 +314,11 @@ static int vmware_cpu_down_prepare(unsigned int cpu)
|
|||
|
||||
static __init int activate_jump_labels(void)
|
||||
{
|
||||
if (has_steal_clock)
|
||||
if (has_steal_clock) {
|
||||
static_key_slow_inc(¶virt_steal_enabled);
|
||||
if (steal_acc)
|
||||
static_key_slow_inc(¶virt_steal_rq_enabled);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue