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x86/intel_rdt/mbm: Add mbm counter initialization

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MBM counters are monotonically increasing counts representing the total
memory bytes at a particular time. In order to calculate total_bytes for
an rdtgroup, we store the value of the counter when we create an
rdtgroup or when a new domain comes online.

When the total_bytes(all memory controller bytes) or local_bytes(local
memory controller bytes) file in "mon_data" is read it shows the
total bytes for that rdtgroup since its creation. User can snapshot this
at different time intervals to obtain bytes/second.

Signed-off-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: ravi.v.shankar@intel.com
Cc: tony.luck@intel.com
Cc: fenghua.yu@intel.com
Cc: peterz@infradead.org
Cc: eranian@google.com
Cc: vikas.shivappa@intel.com
Cc: ak@linux.intel.com
Cc: davidcc@google.com
Cc: reinette.chatre@intel.com
Link: http://lkml.kernel.org/r/1501017287-28083-28-git-send-email-vikas.shivappa@linux.intel.com
This commit is contained in:
Vikas Shivappa
2017-07-25 14:14:46 -07:00
committed by Thomas Gleixner
parent 9f52425ba3
commit a4de1dfdd7
4 changed files with 23 additions and 2 deletions
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9
arch/x86/kernel/cpu/intel_rdt.h
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@@ -55,6 +55,7 @@ struct rmid_read {
struct rdtgroup *rgrp;
struct rdt_domain *d;
int evtid;
bool first;
u64 val;
};
@@ -263,6 +264,12 @@ static inline bool is_mbm_enabled(void)
return (is_mbm_total_enabled() || is_mbm_local_enabled());
}
static inline bool is_mbm_event(int e)
{
return (e >= QOS_L3_MBM_TOTAL_EVENT_ID &&
e <= QOS_L3_MBM_LOCAL_EVENT_ID);
}
/**
* struct rdt_resource - attributes of an RDT resource
* @rid: The index of the resource
@@ -402,5 +409,7 @@ void rmdir_mondata_subdir_allrdtgrp(struct rdt_resource *r,
unsigned int dom_id);
void mkdir_mondata_subdir_allrdtgrp(struct rdt_resource *r,
struct rdt_domain *d);
void mon_event_read(struct rmid_read *rr, struct rdt_domain *d,
struct rdtgroup *rdtgrp, int evtid, int first);
#endif /* _ASM_X86_INTEL_RDT_H */