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authorHemant Kumar <hemant@linux.vnet.ibm.com>2016-01-28 01:33:07 -0500
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-01-29 15:49:54 -0500
commit78e6c39b231a8e31e193534fdbe29291b7fd8f37 (patch)
tree3a883d358a2925a053e983478dc039d6dde0786a /tools/perf/arch
parent066d3593e1b14690dc1131d50cacbb0b7eb3f160 (diff)
perf kvm/powerpc: Add support for HCALL reasons
Powerpc provides hcall events that also provides insights into guest behaviour. Enhance perf kvm stat to record and analyze hcall events. - To trace hcall events : perf kvm stat record - To show the results : perf kvm stat report --event=hcall The result shows the number of hypervisor calls from the guest grouped by their respective reasons displayed with the frequency. This patch makes use of two additional tracepoints "kvm_hv:kvm_hcall_enter" and "kvm_hv:kvm_hcall_exit". To map the hcall codes to their respective names, it needs a mapping. Such mapping is added in this patch in book3s_hcalls.h. # pgrep qemu A sample output : 19378 60515 2 VMs running. # perf kvm stat record -a ^C[ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 4.153 MB perf.data.guest (39624 samples) ] # perf kvm stat report -p 60515 --event=hcall Analyze events for all VMs, all VCPUs: HCALL-EVENT Samples Samples% Time% MinTime MaxTime AvgTime H_IPI 822 66.08% 88.10% 0.63us 11.38us 2.05us (+- 1.42%) H_SEND_CRQ 144 11.58% 3.77% 0.41us 0.88us 0.50us (+- 1.47%) H_VIO_SIGNAL 118 9.49% 2.86% 0.37us 0.83us 0.47us (+- 1.43%) H_PUT_TERM_CHAR 76 6.11% 2.07% 0.37us 0.90us 0.52us (+- 2.43%) H_GET_TERM_CHAR 74 5.95% 2.23% 0.37us 1.70us 0.58us (+- 4.77%) H_RTAS 6 0.48% 0.85% 1.10us 9.25us 2.70us (+-48.57%) H_PERFMON 4 0.32% 0.12% 0.41us 0.96us 0.59us (+-20.92%) Total Samples:1244, Total events handled time:1916.69us. Signed-off-by: Hemant Kumar <hemant@linux.vnet.ibm.com> Cc: Alexander Yarygin <yarygin@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Scott Wood <scottwood@freescale.com> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/1453962787-15376-4-git-send-email-hemant@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/arch')
-rw-r--r--tools/perf/arch/powerpc/util/book3s_hcalls.h123
-rw-r--r--tools/perf/arch/powerpc/util/kvm-stat.c65
2 files changed, 187 insertions, 1 deletions
diff --git a/tools/perf/arch/powerpc/util/book3s_hcalls.h b/tools/perf/arch/powerpc/util/book3s_hcalls.h
new file mode 100644
index 000000000000..0dd6b7f2d44f
--- /dev/null
+++ b/tools/perf/arch/powerpc/util/book3s_hcalls.h
@@ -0,0 +1,123 @@
1#ifndef ARCH_PERF_BOOK3S_HV_HCALLS_H
2#define ARCH_PERF_BOOK3S_HV_HCALLS_H
3
4/*
5 * PowerPC HCALL codes : hcall code to name mapping
6 */
7#define kvm_trace_symbol_hcall \
8 {0x4, "H_REMOVE"}, \
9 {0x8, "H_ENTER"}, \
10 {0xc, "H_READ"}, \
11 {0x10, "H_CLEAR_MOD"}, \
12 {0x14, "H_CLEAR_REF"}, \
13 {0x18, "H_PROTECT"}, \
14 {0x1c, "H_GET_TCE"}, \
15 {0x20, "H_PUT_TCE"}, \
16 {0x24, "H_SET_SPRG0"}, \
17 {0x28, "H_SET_DABR"}, \
18 {0x2c, "H_PAGE_INIT"}, \
19 {0x30, "H_SET_ASR"}, \
20 {0x34, "H_ASR_ON"}, \
21 {0x38, "H_ASR_OFF"}, \
22 {0x3c, "H_LOGICAL_CI_LOAD"}, \
23 {0x40, "H_LOGICAL_CI_STORE"}, \
24 {0x44, "H_LOGICAL_CACHE_LOAD"}, \
25 {0x48, "H_LOGICAL_CACHE_STORE"}, \
26 {0x4c, "H_LOGICAL_ICBI"}, \
27 {0x50, "H_LOGICAL_DCBF"}, \
28 {0x54, "H_GET_TERM_CHAR"}, \
29 {0x58, "H_PUT_TERM_CHAR"}, \
30 {0x5c, "H_REAL_TO_LOGICAL"}, \
31 {0x60, "H_HYPERVISOR_DATA"}, \
32 {0x64, "H_EOI"}, \
33 {0x68, "H_CPPR"}, \
34 {0x6c, "H_IPI"}, \
35 {0x70, "H_IPOLL"}, \
36 {0x74, "H_XIRR"}, \
37 {0x78, "H_MIGRATE_DMA"}, \
38 {0x7c, "H_PERFMON"}, \
39 {0xdc, "H_REGISTER_VPA"}, \
40 {0xe0, "H_CEDE"}, \
41 {0xe4, "H_CONFER"}, \
42 {0xe8, "H_PROD"}, \
43 {0xec, "H_GET_PPP"}, \
44 {0xf0, "H_SET_PPP"}, \
45 {0xf4, "H_PURR"}, \
46 {0xf8, "H_PIC"}, \
47 {0xfc, "H_REG_CRQ"}, \
48 {0x100, "H_FREE_CRQ"}, \
49 {0x104, "H_VIO_SIGNAL"}, \
50 {0x108, "H_SEND_CRQ"}, \
51 {0x110, "H_COPY_RDMA"}, \
52 {0x114, "H_REGISTER_LOGICAL_LAN"}, \
53 {0x118, "H_FREE_LOGICAL_LAN"}, \
54 {0x11c, "H_ADD_LOGICAL_LAN_BUFFER"}, \
55 {0x120, "H_SEND_LOGICAL_LAN"}, \
56 {0x124, "H_BULK_REMOVE"}, \
57 {0x130, "H_MULTICAST_CTRL"}, \
58 {0x134, "H_SET_XDABR"}, \
59 {0x138, "H_STUFF_TCE"}, \
60 {0x13c, "H_PUT_TCE_INDIRECT"}, \
61 {0x14c, "H_CHANGE_LOGICAL_LAN_MAC"}, \
62 {0x150, "H_VTERM_PARTNER_INFO"}, \
63 {0x154, "H_REGISTER_VTERM"}, \
64 {0x158, "H_FREE_VTERM"}, \
65 {0x15c, "H_RESET_EVENTS"}, \
66 {0x160, "H_ALLOC_RESOURCE"}, \
67 {0x164, "H_FREE_RESOURCE"}, \
68 {0x168, "H_MODIFY_QP"}, \
69 {0x16c, "H_QUERY_QP"}, \
70 {0x170, "H_REREGISTER_PMR"}, \
71 {0x174, "H_REGISTER_SMR"}, \
72 {0x178, "H_QUERY_MR"}, \
73 {0x17c, "H_QUERY_MW"}, \
74 {0x180, "H_QUERY_HCA"}, \
75 {0x184, "H_QUERY_PORT"}, \
76 {0x188, "H_MODIFY_PORT"}, \
77 {0x18c, "H_DEFINE_AQP1"}, \
78 {0x190, "H_GET_TRACE_BUFFER"}, \
79 {0x194, "H_DEFINE_AQP0"}, \
80 {0x198, "H_RESIZE_MR"}, \
81 {0x19c, "H_ATTACH_MCQP"}, \
82 {0x1a0, "H_DETACH_MCQP"}, \
83 {0x1a4, "H_CREATE_RPT"}, \
84 {0x1a8, "H_REMOVE_RPT"}, \
85 {0x1ac, "H_REGISTER_RPAGES"}, \
86 {0x1b0, "H_DISABLE_AND_GETC"}, \
87 {0x1b4, "H_ERROR_DATA"}, \
88 {0x1b8, "H_GET_HCA_INFO"}, \
89 {0x1bc, "H_GET_PERF_COUNT"}, \
90 {0x1c0, "H_MANAGE_TRACE"}, \
91 {0x1d4, "H_FREE_LOGICAL_LAN_BUFFER"}, \
92 {0x1d8, "H_POLL_PENDING"}, \
93 {0x1e4, "H_QUERY_INT_STATE"}, \
94 {0x244, "H_ILLAN_ATTRIBUTES"}, \
95 {0x250, "H_MODIFY_HEA_QP"}, \
96 {0x254, "H_QUERY_HEA_QP"}, \
97 {0x258, "H_QUERY_HEA"}, \
98 {0x25c, "H_QUERY_HEA_PORT"}, \
99 {0x260, "H_MODIFY_HEA_PORT"}, \
100 {0x264, "H_REG_BCMC"}, \
101 {0x268, "H_DEREG_BCMC"}, \
102 {0x26c, "H_REGISTER_HEA_RPAGES"}, \
103 {0x270, "H_DISABLE_AND_GET_HEA"}, \
104 {0x274, "H_GET_HEA_INFO"}, \
105 {0x278, "H_ALLOC_HEA_RESOURCE"}, \
106 {0x284, "H_ADD_CONN"}, \
107 {0x288, "H_DEL_CONN"}, \
108 {0x298, "H_JOIN"}, \
109 {0x2a4, "H_VASI_STATE"}, \
110 {0x2b0, "H_ENABLE_CRQ"}, \
111 {0x2b8, "H_GET_EM_PARMS"}, \
112 {0x2d0, "H_SET_MPP"}, \
113 {0x2d4, "H_GET_MPP"}, \
114 {0x2ec, "H_HOME_NODE_ASSOCIATIVITY"}, \
115 {0x2f4, "H_BEST_ENERGY"}, \
116 {0x2fc, "H_XIRR_X"}, \
117 {0x300, "H_RANDOM"}, \
118 {0x304, "H_COP"}, \
119 {0x314, "H_GET_MPP_X"}, \
120 {0x31c, "H_SET_MODE"}, \
121 {0xf000, "H_RTAS"} \
122
123#endif
diff --git a/tools/perf/arch/powerpc/util/kvm-stat.c b/tools/perf/arch/powerpc/util/kvm-stat.c
index 27bc559b8b3a..74eee30398f8 100644
--- a/tools/perf/arch/powerpc/util/kvm-stat.c
+++ b/tools/perf/arch/powerpc/util/kvm-stat.c
@@ -1,9 +1,11 @@
1#include "util/kvm-stat.h" 1#include "util/kvm-stat.h"
2#include "util/parse-events.h" 2#include "util/parse-events.h"
3#include "util/debug.h"
3 4
4#include "book3s_hv_exits.h" 5#include "book3s_hv_exits.h"
6#include "book3s_hcalls.h"
5 7
6#define NR_TPS 2 8#define NR_TPS 4
7 9
8const char *vcpu_id_str = "vcpu_id"; 10const char *vcpu_id_str = "vcpu_id";
9const int decode_str_len = 40; 11const int decode_str_len = 40;
@@ -11,17 +13,77 @@ const char *kvm_entry_trace = "kvm_hv:kvm_guest_enter";
11const char *kvm_exit_trace = "kvm_hv:kvm_guest_exit"; 13const char *kvm_exit_trace = "kvm_hv:kvm_guest_exit";
12 14
13define_exit_reasons_table(hv_exit_reasons, kvm_trace_symbol_exit); 15define_exit_reasons_table(hv_exit_reasons, kvm_trace_symbol_exit);
16define_exit_reasons_table(hcall_reasons, kvm_trace_symbol_hcall);
14 17
15/* Tracepoints specific to ppc_book3s_hv */ 18/* Tracepoints specific to ppc_book3s_hv */
16const char *ppc_book3s_hv_kvm_tp[] = { 19const char *ppc_book3s_hv_kvm_tp[] = {
17 "kvm_hv:kvm_guest_enter", 20 "kvm_hv:kvm_guest_enter",
18 "kvm_hv:kvm_guest_exit", 21 "kvm_hv:kvm_guest_exit",
22 "kvm_hv:kvm_hcall_enter",
23 "kvm_hv:kvm_hcall_exit",
24 NULL,
19}; 25};
20 26
21/* 1 extra placeholder for NULL */ 27/* 1 extra placeholder for NULL */
22const char *kvm_events_tp[NR_TPS + 1]; 28const char *kvm_events_tp[NR_TPS + 1];
23const char *kvm_exit_reason; 29const char *kvm_exit_reason;
24 30
31static void hcall_event_get_key(struct perf_evsel *evsel,
32 struct perf_sample *sample,
33 struct event_key *key)
34{
35 key->info = 0;
36 key->key = perf_evsel__intval(evsel, sample, "req");
37}
38
39static const char *get_hcall_exit_reason(u64 exit_code)
40{
41 struct exit_reasons_table *tbl = hcall_reasons;
42
43 while (tbl->reason != NULL) {
44 if (tbl->exit_code == exit_code)
45 return tbl->reason;
46 tbl++;
47 }
48
49 pr_debug("Unknown hcall code: %lld\n",
50 (unsigned long long)exit_code);
51 return "UNKNOWN";
52}
53
54static bool hcall_event_end(struct perf_evsel *evsel,
55 struct perf_sample *sample __maybe_unused,
56 struct event_key *key __maybe_unused)
57{
58 return (!strcmp(evsel->name, kvm_events_tp[3]));
59}
60
61static bool hcall_event_begin(struct perf_evsel *evsel,
62 struct perf_sample *sample, struct event_key *key)
63{
64 if (!strcmp(evsel->name, kvm_events_tp[2])) {
65 hcall_event_get_key(evsel, sample, key);
66 return true;
67 }
68
69 return false;
70}
71static void hcall_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused,
72 struct event_key *key,
73 char *decode)
74{
75 const char *hcall_reason = get_hcall_exit_reason(key->key);
76
77 scnprintf(decode, decode_str_len, "%s", hcall_reason);
78}
79
80static struct kvm_events_ops hcall_events = {
81 .is_begin_event = hcall_event_begin,
82 .is_end_event = hcall_event_end,
83 .decode_key = hcall_event_decode_key,
84 .name = "HCALL-EVENT",
85};
86
25static struct kvm_events_ops exit_events = { 87static struct kvm_events_ops exit_events = {
26 .is_begin_event = exit_event_begin, 88 .is_begin_event = exit_event_begin,
27 .is_end_event = exit_event_end, 89 .is_end_event = exit_event_end,
@@ -31,6 +93,7 @@ static struct kvm_events_ops exit_events = {
31 93
32struct kvm_reg_events_ops kvm_reg_events_ops[] = { 94struct kvm_reg_events_ops kvm_reg_events_ops[] = {
33 { .name = "vmexit", .ops = &exit_events }, 95 { .name = "vmexit", .ops = &exit_events },
96 { .name = "hcall", .ops = &hcall_events },
34 { NULL, NULL }, 97 { NULL, NULL },
35}; 98};
36 99
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