37 lines
1.4 KiB
Diff
37 lines
1.4 KiB
Diff
From c7937b1115fb30c8ca23460c0af0c652708f2da5 Mon Sep 17 00:00:00 2001
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From: David Abdurachmanov <david.abdurachmanov@gmail.com>
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Date: Wed, 13 Jun 2018 13:25:49 +0200
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Subject: [PATCH] Enable multi-thread support in xz compression
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xz-utils starting 5.2.0 (2014-12-21) support multi-threaded compression.
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This version was added to Fedora 22 (2015-01-07) and also available in
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CentOS 7.
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-T 0 allows xz to use all available cores on the system assuming input
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file is big enough and there is enough memory on the system.
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Tested on SiFive HiFive Unleashed (RISC-V, riscv64) with Fedora and it
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showed significant time savings.
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Signed-off-by: David Abdurachmanov <david.abdurachmanov@gmail.com>
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---
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appcreate/appliance.py | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/appcreate/appliance.py b/appcreate/appliance.py
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index 34971a3..70428b7 100644
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--- a/appcreate/appliance.py
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+++ b/appcreate/appliance.py
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@@ -643,7 +643,7 @@ class ApplianceImageCreator(ImageCreator):
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if self.__compress:
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# Compress with xz using 16 MiB block size for seekability
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- rc = subprocess.call(["xz", "-z", "--block-size=16777216", src])
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+ rc = subprocess.call(["xz", "-z", "--block-size=16777216", "-T 0", src])
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if rc == 0:
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logging.debug("compression successful")
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if rc != 0:
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--
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2.17.2
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