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Fix stuck when computing mAP. #53

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Fix stuck when computing mAP. #53

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4 changes: 2 additions & 2 deletions mmrotate/datasets/dota.py
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,7 @@
import zipfile
from collections import defaultdict
from functools import partial
from multiprocessing import Pool
from multiprocessing import get_context

import mmcv
import numpy as np
Expand Down Expand Up @@ -380,7 +380,7 @@ def eval_map(det_results,
area_ranges = ([(rg[0]**2, rg[1]**2) for rg in scale_ranges]
if scale_ranges is not None else None)

pool = Pool(nproc)
pool = get_context('spawn').Pool(nproc)
eval_results = []
for i in range(num_classes):
# get gt and det bboxes of this class
Expand Down