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| author |   Dave Barach <dave@barachs.net> | 2020-01-29 18:05:24 -0500 |
|---|---|---|
| committer |   Florin Coras <florin.coras@gmail.com> | 2020-01-30 20:45:18 +0000 |
| commit | c25048bd05a319511aa7386f75e1fae2b2a623c4 (patch) | |
| tree | 4254d34aba20058eb04213ffe4ab738f0dc250fd /src/vppinfra/time.h | |
| parent | 91592c0c9cdd1bc61a2796e41a8becc30aaf8082 (diff) | |
vppinfra: improve clocks_per_second convergence
Apply exponential smoothing to the clock rate update calculation in
clib_time_verify_frequency(), with a half-life of 1 minute and a
sampling frequency of 16 seconds. Within 5 minutes or so, the
calculation converges
With each rate recalculation: reset total_cpu_time based on the kernel
timebase delta since vpp started, and the new clock rate
Improve the "show clock [verbose]" debug CLI command.
BFD echo + echo fail tests marked off until the BFD code can be
reworked a bit.
Type: fix
Signed-off-by: Dave Barach <dave@barachs.net>
Change-Id: I24e88a78819b12867736c875067b386ef6115c5c
Diffstat (limited to 'src/vppinfra/time.h')
| -rw-r--r-- | src/vppinfra/time.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/vppinfra/time.h b/src/vppinfra/time.h index b2d749256d3..4d8997f0a9e 100644 --- a/src/vppinfra/time.h +++ b/src/vppinfra/time.h @@ -39,6 +39,7 @@ #define included_time_h #include <vppinfra/clib.h> +#include <vppinfra/format.h> typedef struct { @@ -56,10 +57,9 @@ typedef struct from clock cycles into seconds. */ f64 seconds_per_clock; - f64 round_to_units; - /* Time stamp of call to clib_time_init call. */ u64 init_cpu_time; + f64 init_reference_time; u64 last_verify_cpu_time; @@ -67,8 +67,14 @@ typedef struct f64 last_verify_reference_time; u32 log2_clocks_per_second, log2_clocks_per_frequency_verify; + + /* Damping constant */ + f64 damping_constant; + } clib_time_t; +format_function_t format_clib_time; + /* Return CPU time stamp as 64bit number. */ #if defined(__x86_64__) || defined(i386) always_inline u64 |