  We present a direct lattice QCD calculation of the $x$-dependence of the pion
distribution amplitude (DA), which is performed using the quasi-DA in large
momentum effective theory on a domain-wall fermion ensemble at physical quark
masses and spacing $a\approx 0.084$ fm. The bare quais-DA matrix elements are
renormalized in the hybrid scheme and matched to $\overline{\rm MS}$ with a
subtraction of the leading renormalon in the Wilson-line mass. For the first
time, we include threshold resummation in the perturbative matching onto the
light-cone DA, which resums the large logarithms in the soft gluon limit at
next-to-next-to-leading log. The resummed results show controlled
scale-variation uncertainty within the range of momentum fraction
$x\in[0.25,0.75]$ at the largest pion momentum $P_z\approx 1.85$~GeV. In
addition, we apply the same analysis to quasi-DAs from a
highly-improved-staggered-quark ensemble at physical pion mass and $a=0.076$
fm. By comparison we find with $2\sigma$ confidence level that the DA obtained
from chiral fermions is flatter and lower near $x=0.5$.
