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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2016-04-20 00:32:15 +0200 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2016-04-20 00:32:15 +0200 |
| commit | 675fd4eecd75a7156c83bb814ecfdbbcfbf27ea1 (patch) | |
| tree | ca1ef6507b938fe491bdf51a2fe6137de52d0f4c /kern/mach_clock.c | |
| parent | c908225cb5def2c6df3cf889ca458db8b633d395 (diff) | |
| download | gnumach-675fd4eecd75a7156c83bb814ecfdbbcfbf27ea1.tar.gz gnumach-675fd4eecd75a7156c83bb814ecfdbbcfbf27ea1.tar.bz2 gnumach-675fd4eecd75a7156c83bb814ecfdbbcfbf27ea1.zip | |
Add kernel profiling through sampling
* NEWS: Advertise feature.
* configfrac.ac (--enable-kernsample): Add option.
* kern/pc_sample.h (take_pc_sample): Add usermode and pc parameter.
(take_pc_sample_macro): Take usermode and pc parameters, pass as such to
take_pc_sample.
* kern/pc_sample.c (take_pc_sample): Use pc parameter when usermode is 1.
* kern/mach_clock.c (clock_interrupt): Add pc parameter. Pass usermode and
pc to take_pc_sample_macro call.
* i386/i386/hardclock.c (hardclock): Pass regs->eip to clock_interrupt call
on normal interrupts, NULL on interrupt interrupt.
* vm/vm_fault.c (vm_fault_cleanup): Set usermode to 1 and pc to NULL in
take_pc_sample_macro call.
Diffstat (limited to 'kern/mach_clock.c')
| -rw-r--r-- | kern/mach_clock.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/kern/mach_clock.c b/kern/mach_clock.c index 1817ce22..d6ebf23e 100644 --- a/kern/mach_clock.c +++ b/kern/mach_clock.c @@ -133,7 +133,8 @@ timer_elt_data_t timer_head; /* ordered list of timeouts */ void clock_interrupt( int usec, /* microseconds per tick */ boolean_t usermode, /* executing user code */ - boolean_t basepri) /* at base priority */ + boolean_t basepri, /* at base priority */ + vm_offset_t pc) /* address of interrupted instruction */ { int my_cpu = cpu_number(); thread_t thread = current_thread(); @@ -184,8 +185,11 @@ void clock_interrupt( * This had better be MP safe. It might be interesting * to keep track of cpu in the sample. */ - if (usermode) { - take_pc_sample_macro(thread, SAMPLED_PC_PERIODIC); +#ifndef MACH_KERNSAMPLE + if (usermode) +#endif + { + take_pc_sample_macro(thread, SAMPLED_PC_PERIODIC, usermode, pc); } #endif /* MACH_PCSAMPLE */ |