tools lib traceevent: Add xen plugin
authorJiri Olsa <jolsa@redhat.com>
Tue, 3 Dec 2013 13:09:33 +0000 (14:09 +0100)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Wed, 4 Dec 2013 18:34:04 +0000 (15:34 -0300)
Adding xen plugin.

This plugin adds fields resolving for following tracepoint events:

  xen:xen_mc_entry
  xen:xen_mc_extend_args

The diff of 'perf script' output generated by old and new code: (data
was generated by 'perf record -e 'xen:*' ls')

  --- script.xen.old
  +++ script.xen.new
  -         swapper     0 [002]   136.267492: xen:xen_mc_entry: [FAILED TO PARSE] op=3 nargs=2 args=ARRAY[18, 00, 00, 00, 00, 00, 00, 00, 00, e0, d4, 4b, 04, 88, ff, ff, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00]
  +         swapper     0 [002]   136.267492: xen:xen_mc_entry: op 3(stack_switch) args [18, 0, 0, 0, 0, 0]
  -            perf  1970 [008]   136.273319: xen:xen_mc_extend_args: [FAILED TO PARSE] op=1 args=16 res=1
  +            perf  1970 [008]   136.273319: xen:xen_mc_extend_args: extending op 1(mmu_update) by 16 bytes res ???

NOTE We still do not handle the 'sizeof' and fail to parse following xen
tracepoints:

  xen:xen_mmu_set_pte
  xen:xen_mmu_set_pte_atomic
  xen:xen_mmu_set_domain_pte
  xen:xen_mmu_set_pte_at
  xen:xen_mmu_set_pmd
  xen:xen_mmu_set_pud
  xen:xen_mmu_set_pgd
  xen:xen_mmu_ptep_modify_prot_start
  xen:xen_mmu_ptep_modify_prot_commit

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1386076182-14484-20-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/lib/traceevent/Makefile
tools/lib/traceevent/plugin_xen.c [new file with mode: 0644]

index 21f9b8f..54af60a 100644 (file)
@@ -219,6 +219,7 @@ PLUGIN_OBJS += plugin_kvm.o
 PLUGIN_OBJS += plugin_mac80211.o
 PLUGIN_OBJS += plugin_sched_switch.o
 PLUGIN_OBJS += plugin_function.o
+PLUGIN_OBJS += plugin_xen.o
 
 PLUGINS := $(PLUGIN_OBJS:.o=.so)
 
diff --git a/tools/lib/traceevent/plugin_xen.c b/tools/lib/traceevent/plugin_xen.c
new file mode 100644 (file)
index 0000000..e779429
--- /dev/null
@@ -0,0 +1,130 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "event-parse.h"
+
+#define __HYPERVISOR_set_trap_table                    0
+#define __HYPERVISOR_mmu_update                                1
+#define __HYPERVISOR_set_gdt                           2
+#define __HYPERVISOR_stack_switch                      3
+#define __HYPERVISOR_set_callbacks                     4
+#define __HYPERVISOR_fpu_taskswitch                    5
+#define __HYPERVISOR_sched_op_compat                   6
+#define __HYPERVISOR_dom0_op                           7
+#define __HYPERVISOR_set_debugreg                      8
+#define __HYPERVISOR_get_debugreg                      9
+#define __HYPERVISOR_update_descriptor                 10
+#define __HYPERVISOR_memory_op                         12
+#define __HYPERVISOR_multicall                         13
+#define __HYPERVISOR_update_va_mapping                 14
+#define __HYPERVISOR_set_timer_op                      15
+#define __HYPERVISOR_event_channel_op_compat           16
+#define __HYPERVISOR_xen_version                       17
+#define __HYPERVISOR_console_io                                18
+#define __HYPERVISOR_physdev_op_compat                 19
+#define __HYPERVISOR_grant_table_op                    20
+#define __HYPERVISOR_vm_assist                         21
+#define __HYPERVISOR_update_va_mapping_otherdomain     22
+#define __HYPERVISOR_iret                              23 /* x86 only */
+#define __HYPERVISOR_vcpu_op                           24
+#define __HYPERVISOR_set_segment_base                  25 /* x86/64 only */
+#define __HYPERVISOR_mmuext_op                         26
+#define __HYPERVISOR_acm_op                            27
+#define __HYPERVISOR_nmi_op                            28
+#define __HYPERVISOR_sched_op                          29
+#define __HYPERVISOR_callback_op                       30
+#define __HYPERVISOR_xenoprof_op                       31
+#define __HYPERVISOR_event_channel_op                  32
+#define __HYPERVISOR_physdev_op                                33
+#define __HYPERVISOR_hvm_op                            34
+#define __HYPERVISOR_tmem_op                           38
+
+/* Architecture-specific hypercall definitions. */
+#define __HYPERVISOR_arch_0                            48
+#define __HYPERVISOR_arch_1                            49
+#define __HYPERVISOR_arch_2                            50
+#define __HYPERVISOR_arch_3                            51
+#define __HYPERVISOR_arch_4                            52
+#define __HYPERVISOR_arch_5                            53
+#define __HYPERVISOR_arch_6                            54
+#define __HYPERVISOR_arch_7                            55
+
+#define N(x)   [__HYPERVISOR_##x] = "("#x")"
+static const char *xen_hypercall_names[] = {
+       N(set_trap_table),
+       N(mmu_update),
+       N(set_gdt),
+       N(stack_switch),
+       N(set_callbacks),
+       N(fpu_taskswitch),
+       N(sched_op_compat),
+       N(dom0_op),
+       N(set_debugreg),
+       N(get_debugreg),
+       N(update_descriptor),
+       N(memory_op),
+       N(multicall),
+       N(update_va_mapping),
+       N(set_timer_op),
+       N(event_channel_op_compat),
+       N(xen_version),
+       N(console_io),
+       N(physdev_op_compat),
+       N(grant_table_op),
+       N(vm_assist),
+       N(update_va_mapping_otherdomain),
+       N(iret),
+       N(vcpu_op),
+       N(set_segment_base),
+       N(mmuext_op),
+       N(acm_op),
+       N(nmi_op),
+       N(sched_op),
+       N(callback_op),
+       N(xenoprof_op),
+       N(event_channel_op),
+       N(physdev_op),
+       N(hvm_op),
+
+/* Architecture-specific hypercall definitions. */
+       N(arch_0),
+       N(arch_1),
+       N(arch_2),
+       N(arch_3),
+       N(arch_4),
+       N(arch_5),
+       N(arch_6),
+       N(arch_7),
+};
+#undef N
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+static const char *xen_hypercall_name(unsigned op)
+{
+       if (op < ARRAY_SIZE(xen_hypercall_names) &&
+           xen_hypercall_names[op] != NULL)
+               return xen_hypercall_names[op];
+
+       return "";
+}
+
+unsigned long long process_xen_hypercall_name(struct trace_seq *s,
+                                             unsigned long long *args)
+{
+       unsigned int op = args[0];
+
+       trace_seq_printf(s, "%s", xen_hypercall_name(op));
+       return 0;
+}
+
+int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
+{
+       pevent_register_print_function(pevent,
+                                      process_xen_hypercall_name,
+                                      PEVENT_FUNC_ARG_STRING,
+                                      "xen_hypercall_name",
+                                      PEVENT_FUNC_ARG_INT,
+                                      PEVENT_FUNC_ARG_VOID);
+       return 0;
+}