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Ensure a rt shm buffer without backfill has correct epoch timestamping

samplerd_service
Tyler Goodlet 2022-11-21 20:25:33 -05:00
parent f2df32a673
commit 1ee49df31d
1 changed files with 11 additions and 1 deletions
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12
piker/data/feed.py
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@ -25,6 +25,7 @@ from collections import defaultdict
from contextlib import asynccontextmanager as acm from contextlib import asynccontextmanager as acm
from datetime import datetime from datetime import datetime
from functools import partial from functools import partial
import time
from types import ModuleType from types import ModuleType
from typing import ( from typing import (
Any, Any,
@ -678,6 +679,10 @@ async def tsdb_backfill(
tsdb_last_frame_start = tsdb_history['Epoch'][0] tsdb_last_frame_start = tsdb_history['Epoch'][0]
if timeframe == 1:
times = shm.array['time']
assert (times[1] - times[0]) == 1
# load as much from storage into shm possible (depends on # load as much from storage into shm possible (depends on
# user's shm size settings). # user's shm size settings).
while ( while (
@ -1204,7 +1209,12 @@ async def allocate_persistent_feed(
rt_shm.push(hist_shm.array[-3:-1]) rt_shm.push(hist_shm.array[-3:-1])
ohlckeys = ['open', 'high', 'low', 'close'] ohlckeys = ['open', 'high', 'low', 'close']
rt_shm.array[ohlckeys][-2:] = hist_shm.array['close'][-1] rt_shm.array[ohlckeys][-2:] = hist_shm.array['close'][-1]
rt_shm.array['volume'][-2] = 0 rt_shm.array['volume'][-2:] = 0
# set fast buffer time step to 1s
ts = round(time.time())
rt_shm.array['time'][0] = ts
rt_shm.array['time'][1] = ts + 1
# wait the spawning parent task to register its subscriber # wait the spawning parent task to register its subscriber
# send-stream entry before we start the sample loop. # send-stream entry before we start the sample loop.