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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1725446419; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=yw4Ud8y3FlFb4oKs5mexih/+lbaE0vzZAzVIm7SPrQ0=; b=TRI8S2yu2WDqWCkbtKWi3DOOO//fxnk3X33H2WWjxJRYgaZk9pFjI6uGHzFoqOWuDcSJtu rwyifPdklEBgRHDD73lhXZ4GKFVz8a5n81qmg2/MnAYuutWOv8giCTuZxWyN94mgSzaUaa sp0UqZippqa7V0jP3QRTH26fqrUytt4= X-MC-Unique: U5FsSMnXNimiVqWTq7D9Mw-1 From: Thomas Huth To: qemu-devel@nongnu.org Cc: Richard Henderson , Stefan Hajnoczi Subject: [PULL 16/42] tests/functional: Allow asset downloading with concurrent threads Date: Wed, 4 Sep 2024 12:38:51 +0200 Message-ID: <20240904103923.451847-17-thuth@redhat.com> In-Reply-To: <20240904103923.451847-1-thuth@redhat.com> References: <20240904103923.451847-1-thuth@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" When running "make -j$(nproc) check-functional", tests that use the same asset might be running in parallel. Improve the downloading to detect this situation and wait for the other thread to finish the download. Message-ID: <20240830133841.142644-17-thuth@redhat.com> Signed-off-by: Thomas Huth --- tests/functional/qemu_test/asset.py | 62 ++++++++++++++++++++++++----- 1 file changed, 51 insertions(+), 11 deletions(-) diff --git a/tests/functional/qemu_test/asset.py b/tests/functional/qemu_te= st/asset.py index b329ab7dbe..d3be2aff82 100644 --- a/tests/functional/qemu_test/asset.py +++ b/tests/functional/qemu_test/asset.py @@ -12,6 +12,7 @@ import sys import unittest import urllib.request +from time import sleep from pathlib import Path from shutil import copyfileobj =20 @@ -55,6 +56,35 @@ def _check(self, cache_file): def valid(self): return self.cache_file.exists() and self._check(self.cache_file) =20 + def _wait_for_other_download(self, tmp_cache_file): + # Another thread already seems to download the asset, so wait until + # it is done, while also checking the size to see whether it is st= uck + try: + current_size =3D tmp_cache_file.stat().st_size + new_size =3D current_size + except: + if os.path.exists(self.cache_file): + return True + raise + waittime =3D lastchange =3D 600 + while waittime > 0: + sleep(1) + waittime -=3D 1 + try: + new_size =3D tmp_cache_file.stat().st_size + except: + if os.path.exists(self.cache_file): + return True + raise + if new_size !=3D current_size: + lastchange =3D waittime + current_size =3D new_size + elif lastchange - waittime > 90: + return False + + self.log.debug("Time out while waiting for %s!", tmp_cache_file) + raise + def fetch(self): if not self.cache_dir.exists(): self.cache_dir.mkdir(parents=3DTrue, exist_ok=3DTrue) @@ -70,18 +100,28 @@ def fetch(self): self.log.info("Downloading %s to %s...", self.url, self.cache_file) tmp_cache_file =3D self.cache_file.with_suffix(".download") =20 - try: - resp =3D urllib.request.urlopen(self.url) - except Exception as e: - self.log.error("Unable to download %s: %s", self.url, e) - raise + for retries in range(3): + try: + with tmp_cache_file.open("xb") as dst: + with urllib.request.urlopen(self.url) as resp: + copyfileobj(resp, dst) + break + except FileExistsError: + self.log.debug("%s already exists, " + "waiting for other thread to finish...", + tmp_cache_file) + if self._wait_for_other_download(tmp_cache_file): + return str(self.cache_file) + self.log.debug("%s seems to be stale, " + "deleting and retrying download...", + tmp_cache_file) + tmp_cache_file.unlink() + continue + except Exception as e: + self.log.error("Unable to download %s: %s", self.url, e) + tmp_cache_file.unlink() + raise =20 - try: - with tmp_cache_file.open("wb+") as dst: - copyfileobj(resp, dst) - except: - tmp_cache_file.unlink() - raise try: # Set these just for informational purposes os.setxattr(str(tmp_cache_file), "user.qemu-asset-url", --=20 2.46.0