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cfcb3d80a2
This enables us to understand how many hash fault we are taking
when running benchmarks.
For ex:
-bash-4.2# ./perf stat -e powerpc:hash_fault -e page-faults /tmp/ebizzy.ppc64 -S 30 -P -n 1000
...
Performance counter stats for '/tmp/ebizzy.ppc64 -S 30 -P -n 1000':
1,10,04,075 powerpc:hash_fault
1,10,03,429 page-faults
30.865978991 seconds time elapsed
NOTE:
The impact of the tracepoint was not noticeable when running test. It was
within the run-time variance of the test. For ex:
without-patch:
--------------
Performance counter stats for './a.out 3000 300':
643 page-faults # 0.089 M/sec
7.236562 task-clock (msec) # 0.928 CPUs utilized
2,179,213 stalled-cycles-frontend # 0.00% frontend cycles idle
17,174,367 stalled-cycles-backend # 0.00% backend cycles idle
0 context-switches # 0.000 K/sec
0.007794658 seconds time elapsed
And with-patch:
---------------
Performance counter stats for './a.out 3000 300':
643 page-faults # 0.089 M/sec
7.233746 task-clock (msec) # 0.921 CPUs utilized
0 context-switches # 0.000 K/sec
0.007854876 seconds time elapsed
Performance counter stats for './a.out 3000 300':
643 page-faults # 0.087 M/sec
649 powerpc:hash_fault # 0.087 M/sec
7.430376 task-clock (msec) # 0.938 CPUs utilized
2,347,174 stalled-cycles-frontend # 0.00% frontend cycles idle
17,524,282 stalled-cycles-backend # 0.00% backend cycles idle
0 context-switches # 0.000 K/sec
0.007920284 seconds time elapsed
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
176 lines
3.2 KiB
C
176 lines
3.2 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM powerpc
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#if !defined(_TRACE_POWERPC_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_POWERPC_H
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#include <linux/tracepoint.h>
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struct pt_regs;
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DECLARE_EVENT_CLASS(ppc64_interrupt_class,
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TP_PROTO(struct pt_regs *regs),
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TP_ARGS(regs),
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TP_STRUCT__entry(
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__field(struct pt_regs *, regs)
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),
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TP_fast_assign(
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__entry->regs = regs;
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),
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TP_printk("pt_regs=%p", __entry->regs)
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);
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DEFINE_EVENT(ppc64_interrupt_class, irq_entry,
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TP_PROTO(struct pt_regs *regs),
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TP_ARGS(regs)
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);
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DEFINE_EVENT(ppc64_interrupt_class, irq_exit,
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TP_PROTO(struct pt_regs *regs),
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TP_ARGS(regs)
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);
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DEFINE_EVENT(ppc64_interrupt_class, timer_interrupt_entry,
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TP_PROTO(struct pt_regs *regs),
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TP_ARGS(regs)
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);
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DEFINE_EVENT(ppc64_interrupt_class, timer_interrupt_exit,
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TP_PROTO(struct pt_regs *regs),
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TP_ARGS(regs)
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);
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#ifdef CONFIG_PPC_PSERIES
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extern void hcall_tracepoint_regfunc(void);
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extern void hcall_tracepoint_unregfunc(void);
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TRACE_EVENT_FN(hcall_entry,
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TP_PROTO(unsigned long opcode, unsigned long *args),
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TP_ARGS(opcode, args),
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TP_STRUCT__entry(
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__field(unsigned long, opcode)
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),
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TP_fast_assign(
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__entry->opcode = opcode;
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),
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TP_printk("opcode=%lu", __entry->opcode),
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hcall_tracepoint_regfunc, hcall_tracepoint_unregfunc
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);
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TRACE_EVENT_FN(hcall_exit,
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TP_PROTO(unsigned long opcode, unsigned long retval,
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unsigned long *retbuf),
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TP_ARGS(opcode, retval, retbuf),
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TP_STRUCT__entry(
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__field(unsigned long, opcode)
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__field(unsigned long, retval)
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),
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TP_fast_assign(
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__entry->opcode = opcode;
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__entry->retval = retval;
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),
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TP_printk("opcode=%lu retval=%lu", __entry->opcode, __entry->retval),
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hcall_tracepoint_regfunc, hcall_tracepoint_unregfunc
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);
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#endif
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#ifdef CONFIG_PPC_POWERNV
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extern void opal_tracepoint_regfunc(void);
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extern void opal_tracepoint_unregfunc(void);
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TRACE_EVENT_FN(opal_entry,
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TP_PROTO(unsigned long opcode, unsigned long *args),
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TP_ARGS(opcode, args),
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TP_STRUCT__entry(
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__field(unsigned long, opcode)
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),
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TP_fast_assign(
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__entry->opcode = opcode;
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),
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TP_printk("opcode=%lu", __entry->opcode),
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opal_tracepoint_regfunc, opal_tracepoint_unregfunc
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);
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TRACE_EVENT_FN(opal_exit,
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TP_PROTO(unsigned long opcode, unsigned long retval),
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TP_ARGS(opcode, retval),
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TP_STRUCT__entry(
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__field(unsigned long, opcode)
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__field(unsigned long, retval)
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),
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TP_fast_assign(
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__entry->opcode = opcode;
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__entry->retval = retval;
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),
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TP_printk("opcode=%lu retval=%lu", __entry->opcode, __entry->retval),
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opal_tracepoint_regfunc, opal_tracepoint_unregfunc
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);
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#endif
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TRACE_EVENT(hash_fault,
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TP_PROTO(unsigned long addr, unsigned long access, unsigned long trap),
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TP_ARGS(addr, access, trap),
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TP_STRUCT__entry(
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__field(unsigned long, addr)
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__field(unsigned long, access)
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__field(unsigned long, trap)
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),
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TP_fast_assign(
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__entry->addr = addr;
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__entry->access = access;
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__entry->trap = trap;
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),
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TP_printk("hash fault with addr 0x%lx and access = 0x%lx trap = 0x%lx",
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__entry->addr, __entry->access, __entry->trap)
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);
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#endif /* _TRACE_POWERPC_H */
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#undef TRACE_INCLUDE_PATH
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_PATH asm
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#define TRACE_INCLUDE_FILE trace
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#include <trace/define_trace.h>
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