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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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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
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#define __PERF_KVM_STAT_H
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#include "../perf.h"
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#include "evsel.h"
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#include "evlist.h"
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#include "session.h"
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#include "tool.h"
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#include "stat.h"
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struct event_key {
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#define INVALID_KEY (~0ULL)
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u64 key;
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int info;
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struct exit_reasons_table *exit_reasons;
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};
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struct kvm_event_stats {
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u64 time;
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struct stats stats;
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};
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struct kvm_event {
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struct list_head hash_entry;
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struct rb_node rb;
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struct event_key key;
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struct kvm_event_stats total;
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#define DEFAULT_VCPU_NUM 8
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int max_vcpu;
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struct kvm_event_stats *vcpu;
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};
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typedef int (*key_cmp_fun)(struct kvm_event*, struct kvm_event*, int);
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struct kvm_event_key {
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const char *name;
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key_cmp_fun key;
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};
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struct perf_kvm_stat;
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struct child_event_ops {
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void (*get_key)(struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct event_key *key);
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const char *name;
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};
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struct kvm_events_ops {
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bool (*is_begin_event)(struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct event_key *key);
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bool (*is_end_event)(struct perf_evsel *evsel,
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struct perf_sample *sample, struct event_key *key);
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struct child_event_ops *child_ops;
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void (*decode_key)(struct perf_kvm_stat *kvm, struct event_key *key,
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char *decode);
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const char *name;
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};
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struct exit_reasons_table {
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unsigned long exit_code;
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const char *reason;
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};
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#define EVENTS_BITS 12
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#define EVENTS_CACHE_SIZE (1UL << EVENTS_BITS)
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struct perf_kvm_stat {
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struct perf_tool tool;
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struct record_opts opts;
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struct perf_evlist *evlist;
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struct perf_session *session;
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const char *file_name;
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const char *report_event;
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const char *sort_key;
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int trace_vcpu;
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struct exit_reasons_table *exit_reasons;
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const char *exit_reasons_isa;
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struct kvm_events_ops *events_ops;
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key_cmp_fun compare;
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struct list_head kvm_events_cache[EVENTS_CACHE_SIZE];
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u64 total_time;
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u64 total_count;
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u64 lost_events;
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u64 duration;
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struct intlist *pid_list;
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struct rb_root result;
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int timerfd;
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unsigned int display_time;
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bool live;
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bool force;
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};
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struct kvm_reg_events_ops {
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const char *name;
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struct kvm_events_ops *ops;
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};
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void exit_event_get_key(struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct event_key *key);
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bool exit_event_begin(struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct event_key *key);
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bool exit_event_end(struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct event_key *key);
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void exit_event_decode_key(struct perf_kvm_stat *kvm,
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struct event_key *key,
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char *decode);
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bool kvm_exit_event(struct perf_evsel *evsel);
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bool kvm_entry_event(struct perf_evsel *evsel);
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#define define_exit_reasons_table(name, symbols) \
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static struct exit_reasons_table name[] = { \
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symbols, { -1, NULL } \
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}
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/*
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* arch specific callbacks and data structures
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*/
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int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid);
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extern const char * const kvm_events_tp[];
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extern struct kvm_reg_events_ops kvm_reg_events_ops[];
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extern const char * const kvm_skip_events[];
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#endif /* __PERF_KVM_STAT_H */
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