mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 00:36:50 +07:00
8cc5ec1f75
Enable perf kvm to use perf.data.guest when it is not owned by current
user or root.
Example:
# perf kvm stat record ls
# chown Yunlong.Song:Yunlong.Song perf.data.guest
# ls -al perf.data.guest
-rw------- 1 Yunlong.Song Yunlong.Song 4128937 Apr 2 11:05 perf.data.guest
# id
uid=0(root) gid=0(root) groups=0(root),64(pkcs11)
Before this patch:
# perf kvm stat report
File perf.data.guest not owned by current user or root (use -f to override)
Initializing perf session failed
# perf kvm stat report -f
Error: unknown switch `f'
usage: perf kvm stat report [<options>]
--event <report event>
event for reporting: vmexit, mmio (x86 only),
ioport (x86 only)
--vcpu <n> vcpu id to report
-k, --key <sort-key> key for sorting: sample(sort by samples
number) time (sort by avg time)
-p, --pid <pid> analyze events only for given process id(s)
As shown above, the -f option does not work at all.
After this patch:
# perf kvm stat report
File perf.data.guest not owned by current user or root (use -f to override)
Initializing perf session failed
# perf kvm stat report -f
Analyze events for all VMs, all VCPUs:
VM-EXIT Samples Samples% Time% Min Time Max Time Avg time
Total Samples:0, Total events handled time:0.00us.
As shown above, the -f option really works now. Since we have not
launched any KVM related process, the result shows 0 sample here.
Signed-off-by: Yunlong Song <yunlong.song@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1427982439-27388-5-git-send-email-yunlong.song@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
141 lines
3.0 KiB
C
141 lines
3.0 KiB
C
#ifndef __PERF_KVM_STAT_H
|
|
#define __PERF_KVM_STAT_H
|
|
|
|
#include "../perf.h"
|
|
#include "evsel.h"
|
|
#include "evlist.h"
|
|
#include "session.h"
|
|
#include "tool.h"
|
|
#include "stat.h"
|
|
|
|
struct event_key {
|
|
#define INVALID_KEY (~0ULL)
|
|
u64 key;
|
|
int info;
|
|
struct exit_reasons_table *exit_reasons;
|
|
};
|
|
|
|
struct kvm_event_stats {
|
|
u64 time;
|
|
struct stats stats;
|
|
};
|
|
|
|
struct kvm_event {
|
|
struct list_head hash_entry;
|
|
struct rb_node rb;
|
|
|
|
struct event_key key;
|
|
|
|
struct kvm_event_stats total;
|
|
|
|
#define DEFAULT_VCPU_NUM 8
|
|
int max_vcpu;
|
|
struct kvm_event_stats *vcpu;
|
|
};
|
|
|
|
typedef int (*key_cmp_fun)(struct kvm_event*, struct kvm_event*, int);
|
|
|
|
struct kvm_event_key {
|
|
const char *name;
|
|
key_cmp_fun key;
|
|
};
|
|
|
|
struct perf_kvm_stat;
|
|
|
|
struct child_event_ops {
|
|
void (*get_key)(struct perf_evsel *evsel,
|
|
struct perf_sample *sample,
|
|
struct event_key *key);
|
|
const char *name;
|
|
};
|
|
|
|
struct kvm_events_ops {
|
|
bool (*is_begin_event)(struct perf_evsel *evsel,
|
|
struct perf_sample *sample,
|
|
struct event_key *key);
|
|
bool (*is_end_event)(struct perf_evsel *evsel,
|
|
struct perf_sample *sample, struct event_key *key);
|
|
struct child_event_ops *child_ops;
|
|
void (*decode_key)(struct perf_kvm_stat *kvm, struct event_key *key,
|
|
char *decode);
|
|
const char *name;
|
|
};
|
|
|
|
struct exit_reasons_table {
|
|
unsigned long exit_code;
|
|
const char *reason;
|
|
};
|
|
|
|
#define EVENTS_BITS 12
|
|
#define EVENTS_CACHE_SIZE (1UL << EVENTS_BITS)
|
|
|
|
struct perf_kvm_stat {
|
|
struct perf_tool tool;
|
|
struct record_opts opts;
|
|
struct perf_evlist *evlist;
|
|
struct perf_session *session;
|
|
|
|
const char *file_name;
|
|
const char *report_event;
|
|
const char *sort_key;
|
|
int trace_vcpu;
|
|
|
|
struct exit_reasons_table *exit_reasons;
|
|
const char *exit_reasons_isa;
|
|
|
|
struct kvm_events_ops *events_ops;
|
|
key_cmp_fun compare;
|
|
struct list_head kvm_events_cache[EVENTS_CACHE_SIZE];
|
|
|
|
u64 total_time;
|
|
u64 total_count;
|
|
u64 lost_events;
|
|
u64 duration;
|
|
|
|
struct intlist *pid_list;
|
|
|
|
struct rb_root result;
|
|
|
|
int timerfd;
|
|
unsigned int display_time;
|
|
bool live;
|
|
bool force;
|
|
};
|
|
|
|
struct kvm_reg_events_ops {
|
|
const char *name;
|
|
struct kvm_events_ops *ops;
|
|
};
|
|
|
|
void exit_event_get_key(struct perf_evsel *evsel,
|
|
struct perf_sample *sample,
|
|
struct event_key *key);
|
|
bool exit_event_begin(struct perf_evsel *evsel,
|
|
struct perf_sample *sample,
|
|
struct event_key *key);
|
|
bool exit_event_end(struct perf_evsel *evsel,
|
|
struct perf_sample *sample,
|
|
struct event_key *key);
|
|
void exit_event_decode_key(struct perf_kvm_stat *kvm,
|
|
struct event_key *key,
|
|
char *decode);
|
|
|
|
bool kvm_exit_event(struct perf_evsel *evsel);
|
|
bool kvm_entry_event(struct perf_evsel *evsel);
|
|
|
|
#define define_exit_reasons_table(name, symbols) \
|
|
static struct exit_reasons_table name[] = { \
|
|
symbols, { -1, NULL } \
|
|
}
|
|
|
|
/*
|
|
* arch specific callbacks and data structures
|
|
*/
|
|
int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid);
|
|
|
|
extern const char * const kvm_events_tp[];
|
|
extern struct kvm_reg_events_ops kvm_reg_events_ops[];
|
|
extern const char * const kvm_skip_events[];
|
|
|
|
#endif /* __PERF_KVM_STAT_H */
|