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From David Wilder <dwilder@us.ibm.com>
* time.c (__stp_estimate_cpufreq): Short-circuit on s390.
(_stp_gettimeofday_ns): Use a fixed formula on s390 to
convert TOD clocks to nanoseconds.
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* time.c (_stp_init_time): Use dynamic percpu allocations
instead of evil static allocations.
(_stp_kill_time): Free percpu allocations and set
_stp_time to NULL so the timers are only deleted once.
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PR 3233
./
* stapfuncs.5.in: Document new gettimeofday_ns.
runtime/
* time.c (stp_time_t): Use ns for the base time, and freq is now kHz.
(__stp_estimate_cpufreq): Compute kHz instead of MHz.
(__stp_time_timer_callback, __stp_init_time): Compute base in ns.
(__stp_time_cpufreq_callback): Record kHz instead of MHz.
(_stp_init_time): Record kHz, and disable preemption to avoid a race
in the cpufreq notifier.
(_stp_gettimeofday_ns): Converted from _stp_gettimeofday_us.
tapset/
* timestamp.stp (gettimeofday_ns): New function
(gettimeofday_us, gettimeofday_ms, gettimeofday_s):
Use gettimeofday_ns as the base unit.
testsuite/
* buildok/timestamp.stp: add gettimeofday_ns test.
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PR 2922
* time.c (_stp_init_time): call cpufreq_get for each cpu from
a non-atomic context (module init time).
* time.c (__stp_init_time): remove call to cpufreq_get from IPI.
* time.c (__stp_time_timer_callback): disable IRQ's to avoid
perturbations in measurements.
* time.c (_stp_gettimeofday_us): disable preemption to avoid CPU
swaps while we're computing the time.
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* time.c: Do cpufreq notification only if CONFIG_CPU_FREQ defined.
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runtime/
* time.c: Time-estimation with minimal dependency on xtime.
runtime/transport/
* transport/transport.c (_stp_handle_start): Initialize timer functions.
* transport.c (_stp_cleanup_and_exit): Teardown timer functions.
tapset/
* timestamp.stp (gettimeofday_us, gettimeofday_ms, gettimeofday_s):
Convert to using the runtime-provided _stp_gettimeofday_us().
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