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authorLasse Collin <lasse.collin@tukaani.org>2020-01-26 14:13:42 +0200
committerLasse Collin <lasse.collin@tukaani.org>2020-01-26 14:13:42 +0200
commit5a49e081a098455bcdbd95cefb90e9b18780fe58 (patch)
tree323ddab03fabed2e00828eaaed8a29598eb06887 /src/xz/coder.c
parentxz: Refactor io_read() a bit. (diff)
downloadxz-5a49e081a098455bcdbd95cefb90e9b18780fe58.tar.xz
xz: Fix semi-busy-waiting in xz --flush-timeout.
When input blocked, xz --flush-timeout=1 would wake up every millisecond and initiate flushing which would have nothing to flush and thus would just waste CPU time. The fix disables the timeout when no input has been seen since the previous flush.
Diffstat (limited to '')
-rw-r--r--src/xz/coder.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/xz/coder.c b/src/xz/coder.c
index 1cd03857..3f561851 100644
--- a/src/xz/coder.c
+++ b/src/xz/coder.c
@@ -729,6 +729,10 @@ coder_normal(file_pair *pair)
// Set the time of the most recent flushing.
mytime_set_flush_time();
+
+ // Mark that we haven't seen any new input
+ // since the previous flush.
+ pair->src_has_seen_input = false;
} else {
// Start a new Block after LZMA_FULL_BARRIER.
if (opt_block_list == NULL) {