diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 1997-06-01 03:16:17 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 1997-06-01 03:16:17 +0000 |
| commit | d8d9b8f76f22b7a16a83e261e64f89ee611f49df (patch) | |
| tree | 3067bc130b80d52808e6390c9fc7fc087ec1e33c /arch/m68k/kernel/time.c | |
| parent | 19c9bba94152148523ba0f7ef7cffe3d45656b11 (diff) | |
Initial revision
Diffstat (limited to 'arch/m68k/kernel/time.c')
| -rw-r--r-- | arch/m68k/kernel/time.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/m68k/kernel/time.c b/arch/m68k/kernel/time.c index dbff49276..7b3acdfa6 100644 --- a/arch/m68k/kernel/time.c +++ b/arch/m68k/kernel/time.c @@ -27,6 +27,24 @@ static inline int set_rtc_mmss(unsigned long nowtime) return -1; } +static inline void do_profile (unsigned long pc) +{ + if (prof_buffer && current->pid) { + extern int _stext; + pc -= (unsigned long) &_stext; + pc >>= prof_shift; + if (pc < prof_len) + ++prof_buffer[pc]; + else + /* + * Dont ignore out-of-bounds PC values silently, + * put them into the last histogram slot, so if + * present, they will show up as a sharp peak. + */ + ++prof_buffer[prof_len-1]; + } +} + /* * timer_interrupt() needs to keep up the real-time clock, * as well as call the "do_timer()" routine every clocktick @@ -38,6 +56,9 @@ static void timer_interrupt(int irq, void *dummy, struct pt_regs * regs) do_timer(regs); + if (!user_mode(regs)) + do_profile(regs->pc); + /* * If we have an externally synchronized Linux clock, then update * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be |