mirror of https://gitee.com/openkylin/linux.git
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>
This commit is contained in:
Hemant Kumar
Arnaldo Carvalho de Melo
parent
066d3593e1
commit
78e6c39b23
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@ -0,0 +1,123 @@
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#ifndef ARCH_PERF_BOOK3S_HV_HCALLS_H
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#define ARCH_PERF_BOOK3S_HV_HCALLS_H
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/*
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* PowerPC HCALL codes : hcall code to name mapping
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*/
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#define kvm_trace_symbol_hcall \
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{0x4, "H_REMOVE"}, \
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{0x8, "H_ENTER"}, \
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{0xc, "H_READ"}, \
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{0x10, "H_CLEAR_MOD"}, \
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{0x14, "H_CLEAR_REF"}, \
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{0x18, "H_PROTECT"}, \
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{0x1c, "H_GET_TCE"}, \
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{0x20, "H_PUT_TCE"}, \
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{0x24, "H_SET_SPRG0"}, \
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{0x28, "H_SET_DABR"}, \
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{0x2c, "H_PAGE_INIT"}, \
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{0x30, "H_SET_ASR"}, \
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{0x34, "H_ASR_ON"}, \
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{0x38, "H_ASR_OFF"}, \
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{0x3c, "H_LOGICAL_CI_LOAD"}, \
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{0x40, "H_LOGICAL_CI_STORE"}, \
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{0x44, "H_LOGICAL_CACHE_LOAD"}, \
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{0x48, "H_LOGICAL_CACHE_STORE"}, \
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{0x4c, "H_LOGICAL_ICBI"}, \
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{0x50, "H_LOGICAL_DCBF"}, \
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{0x54, "H_GET_TERM_CHAR"}, \
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{0x58, "H_PUT_TERM_CHAR"}, \
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{0x5c, "H_REAL_TO_LOGICAL"}, \
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{0x60, "H_HYPERVISOR_DATA"}, \
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{0x64, "H_EOI"}, \
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{0x68, "H_CPPR"}, \
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{0x6c, "H_IPI"}, \
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{0x70, "H_IPOLL"}, \
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{0x74, "H_XIRR"}, \
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{0x78, "H_MIGRATE_DMA"}, \
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{0x7c, "H_PERFMON"}, \
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{0xdc, "H_REGISTER_VPA"}, \
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{0xe0, "H_CEDE"}, \
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{0xe4, "H_CONFER"}, \
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{0xe8, "H_PROD"}, \
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{0xec, "H_GET_PPP"}, \
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{0xf0, "H_SET_PPP"}, \
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{0xf4, "H_PURR"}, \
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{0xf8, "H_PIC"}, \
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{0xfc, "H_REG_CRQ"}, \
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{0x100, "H_FREE_CRQ"}, \
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{0x104, "H_VIO_SIGNAL"}, \
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{0x108, "H_SEND_CRQ"}, \
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{0x110, "H_COPY_RDMA"}, \
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{0x114, "H_REGISTER_LOGICAL_LAN"}, \
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{0x118, "H_FREE_LOGICAL_LAN"}, \
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{0x11c, "H_ADD_LOGICAL_LAN_BUFFER"}, \
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{0x120, "H_SEND_LOGICAL_LAN"}, \
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{0x124, "H_BULK_REMOVE"}, \
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{0x130, "H_MULTICAST_CTRL"}, \
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{0x134, "H_SET_XDABR"}, \
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{0x138, "H_STUFF_TCE"}, \
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{0x13c, "H_PUT_TCE_INDIRECT"}, \
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{0x14c, "H_CHANGE_LOGICAL_LAN_MAC"}, \
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{0x150, "H_VTERM_PARTNER_INFO"}, \
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{0x154, "H_REGISTER_VTERM"}, \
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{0x158, "H_FREE_VTERM"}, \
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{0x15c, "H_RESET_EVENTS"}, \
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{0x160, "H_ALLOC_RESOURCE"}, \
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{0x164, "H_FREE_RESOURCE"}, \
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{0x168, "H_MODIFY_QP"}, \
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{0x16c, "H_QUERY_QP"}, \
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{0x170, "H_REREGISTER_PMR"}, \
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{0x174, "H_REGISTER_SMR"}, \
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{0x178, "H_QUERY_MR"}, \
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{0x17c, "H_QUERY_MW"}, \
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{0x180, "H_QUERY_HCA"}, \
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{0x184, "H_QUERY_PORT"}, \
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{0x188, "H_MODIFY_PORT"}, \
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{0x18c, "H_DEFINE_AQP1"}, \
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{0x190, "H_GET_TRACE_BUFFER"}, \
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{0x194, "H_DEFINE_AQP0"}, \
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{0x198, "H_RESIZE_MR"}, \
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{0x19c, "H_ATTACH_MCQP"}, \
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{0x1a0, "H_DETACH_MCQP"}, \
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{0x1a4, "H_CREATE_RPT"}, \
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{0x1a8, "H_REMOVE_RPT"}, \
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{0x1ac, "H_REGISTER_RPAGES"}, \
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{0x1b0, "H_DISABLE_AND_GETC"}, \
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{0x1b4, "H_ERROR_DATA"}, \
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{0x1b8, "H_GET_HCA_INFO"}, \
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{0x1bc, "H_GET_PERF_COUNT"}, \
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{0x1c0, "H_MANAGE_TRACE"}, \
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{0x1d4, "H_FREE_LOGICAL_LAN_BUFFER"}, \
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{0x1d8, "H_POLL_PENDING"}, \
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{0x1e4, "H_QUERY_INT_STATE"}, \
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{0x244, "H_ILLAN_ATTRIBUTES"}, \
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{0x250, "H_MODIFY_HEA_QP"}, \
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{0x254, "H_QUERY_HEA_QP"}, \
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{0x258, "H_QUERY_HEA"}, \
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{0x25c, "H_QUERY_HEA_PORT"}, \
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{0x260, "H_MODIFY_HEA_PORT"}, \
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{0x264, "H_REG_BCMC"}, \
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{0x268, "H_DEREG_BCMC"}, \
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{0x26c, "H_REGISTER_HEA_RPAGES"}, \
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{0x270, "H_DISABLE_AND_GET_HEA"}, \
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{0x274, "H_GET_HEA_INFO"}, \
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{0x278, "H_ALLOC_HEA_RESOURCE"}, \
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{0x284, "H_ADD_CONN"}, \
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{0x288, "H_DEL_CONN"}, \
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{0x298, "H_JOIN"}, \
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{0x2a4, "H_VASI_STATE"}, \
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{0x2b0, "H_ENABLE_CRQ"}, \
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{0x2b8, "H_GET_EM_PARMS"}, \
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{0x2d0, "H_SET_MPP"}, \
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{0x2d4, "H_GET_MPP"}, \
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{0x2ec, "H_HOME_NODE_ASSOCIATIVITY"}, \
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{0x2f4, "H_BEST_ENERGY"}, \
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{0x2fc, "H_XIRR_X"}, \
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{0x300, "H_RANDOM"}, \
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{0x304, "H_COP"}, \
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{0x314, "H_GET_MPP_X"}, \
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{0x31c, "H_SET_MODE"}, \
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{0xf000, "H_RTAS"} \
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#endif
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@ -1,9 +1,11 @@
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#include "util/kvm-stat.h"
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#include "util/parse-events.h"
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#include "util/debug.h"
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#include "book3s_hv_exits.h"
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#include "book3s_hcalls.h"
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#define NR_TPS 2
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#define NR_TPS 4
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const char *vcpu_id_str = "vcpu_id";
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const int decode_str_len = 40;
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@ -11,17 +13,77 @@ const char *kvm_entry_trace = "kvm_hv:kvm_guest_enter";
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const char *kvm_exit_trace = "kvm_hv:kvm_guest_exit";
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define_exit_reasons_table(hv_exit_reasons, kvm_trace_symbol_exit);
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define_exit_reasons_table(hcall_reasons, kvm_trace_symbol_hcall);
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/* Tracepoints specific to ppc_book3s_hv */
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const char *ppc_book3s_hv_kvm_tp[] = {
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"kvm_hv:kvm_guest_enter",
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"kvm_hv:kvm_guest_exit",
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"kvm_hv:kvm_hcall_enter",
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"kvm_hv:kvm_hcall_exit",
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NULL,
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};
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/* 1 extra placeholder for NULL */
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const char *kvm_events_tp[NR_TPS + 1];
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const char *kvm_exit_reason;
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static void hcall_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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{
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key->info = 0;
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key->key = perf_evsel__intval(evsel, sample, "req");
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}
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static const char *get_hcall_exit_reason(u64 exit_code)
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{
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struct exit_reasons_table *tbl = hcall_reasons;
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while (tbl->reason != NULL) {
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if (tbl->exit_code == exit_code)
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return tbl->reason;
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tbl++;
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}
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pr_debug("Unknown hcall code: %lld\n",
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(unsigned long long)exit_code);
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return "UNKNOWN";
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}
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static bool hcall_event_end(struct perf_evsel *evsel,
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struct perf_sample *sample __maybe_unused,
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struct event_key *key __maybe_unused)
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{
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return (!strcmp(evsel->name, kvm_events_tp[3]));
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}
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static bool hcall_event_begin(struct perf_evsel *evsel,
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struct perf_sample *sample, struct event_key *key)
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{
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if (!strcmp(evsel->name, kvm_events_tp[2])) {
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hcall_event_get_key(evsel, sample, key);
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return true;
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}
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return false;
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}
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static void hcall_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused,
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struct event_key *key,
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char *decode)
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{
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const char *hcall_reason = get_hcall_exit_reason(key->key);
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scnprintf(decode, decode_str_len, "%s", hcall_reason);
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}
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static struct kvm_events_ops hcall_events = {
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.is_begin_event = hcall_event_begin,
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.is_end_event = hcall_event_end,
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.decode_key = hcall_event_decode_key,
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.name = "HCALL-EVENT",
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};
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static struct kvm_events_ops exit_events = {
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.is_begin_event = exit_event_begin,
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.is_end_event = exit_event_end,
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@ -31,6 +93,7 @@ static struct kvm_events_ops exit_events = {
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struct kvm_reg_events_ops kvm_reg_events_ops[] = {
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{ .name = "vmexit", .ops = &exit_events },
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{ .name = "hcall", .ops = &hcall_events },
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{ NULL, NULL },
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};
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