fixed ovlog tests
and updated man page
diff --git a/lib/zstd.h b/lib/zstd.h
index 0bad90f..b18fc8a 100644
--- a/lib/zstd.h
+++ b/lib/zstd.h
@@ -610,12 +610,12 @@
* It helps preserve compression ratio, while each job is compressed in parallel.
* This value is enforced only when nbWorkers >= 1.
* Larger values increase compression ratio, but decrease speed.
- * Values range from 0 to 9 (overlap a full windowSize).
- * - 0 means "auto" : value will be determined by the library, depending on strategy
+ * Possible values range from 0 to 9 :
+ * - 0 means "default" : value will be determined by the library, depending on strategy
* - 1 means "no overlap"
* - 9 means "full overlap", using a full window size.
* Each intermediate rank increases/decreases load size by a factor 2 :
- * 9: full window; 8: w/2; 7: w/4; 6: w/8; 5:w/16; 4: w/32; 3:w/64; 2:w/128; 1:no overlap; 0:auto
+ * 9: full window; 8: w/2; 7: w/4; 6: w/8; 5:w/16; 4: w/32; 3:w/64; 2:w/128; 1:no overlap; 0:default
* default value varies between 6 and 9, depending on strategy */
/* note : additional experimental parameters are also available
diff --git a/programs/zstd.1 b/programs/zstd.1
index 230bba5..c93755f 100644
--- a/programs/zstd.1
+++ b/programs/zstd.1
@@ -389,7 +389,7 @@
Determine \fBoverlapSize\fR, amount of data reloaded from previous job\. This parameter is only available when multithreading is enabled\. Reloading more data improves compression ratio, but decreases speed\.
.
.IP
-The minimum \fIovlog\fR is 0, and the maximum is 9\. 0 means "no overlap", hence completely independent jobs\. 9 means "full overlap", meaning up to \fBwindowSize\fR is reloaded from previous job\. Reducing \fIovlog\fR by 1 reduces the amount of reload by a factor 2\. Default \fIovlog\fR is 6, which means "reload \fBwindowSize / 8\fR"\. Exception : the maximum compression level (22) has a default \fIovlog\fR of 9\.
+The minimum \fIovlog\fR is 0, and the maximum is 9\. 1 means "no overlap", hence completely independent jobs\. 9 means "full overlap", meaning up to \fBwindowSize\fR is reloaded from previous job\. Reducing \fIovlog\fR by 1 reduces the reloaded amount by a factor 2\. For example, 8 means "windowSize/2", and 6 means "windowSize/8"\. Value 0 is special and means "default" : \fIovlog\fR is automatically determined by \fBzstd\fR\. In which case, \fIovlog\fR will range from 6 to 9, depending on selected \fIstrat\fR\.
.
.TP
\fBldmHashLog\fR=\fIlhlog\fR, \fBlhlog\fR=\fIlhlog\fR
diff --git a/programs/zstd.1.md b/programs/zstd.1.md
index 3481054..e20b890 100644
--- a/programs/zstd.1.md
+++ b/programs/zstd.1.md
@@ -415,11 +415,12 @@
Reloading more data improves compression ratio, but decreases speed.
The minimum _ovlog_ is 0, and the maximum is 9.
- 0 means "no overlap", hence completely independent jobs.
+ 1 means "no overlap", hence completely independent jobs.
9 means "full overlap", meaning up to `windowSize` is reloaded from previous job.
- Reducing _ovlog_ by 1 reduces the amount of reload by a factor 2.
- Default _ovlog_ is 6, which means "reload `windowSize / 8`".
- Exception : the maximum compression level (22) has a default _ovlog_ of 9.
+ Reducing _ovlog_ by 1 reduces the reloaded amount by a factor 2.
+ For example, 8 means "windowSize/2", and 6 means "windowSize/8".
+ Value 0 is special and means "default" : _ovlog_ is automatically determined by `zstd`.
+ In which case, _ovlog_ will range from 6 to 9, depending on selected _strat_.
- `ldmHashLog`=_lhlog_, `lhlog`=_lhlog_:
Specify the maximum size for a hash table used for long distance matching.
diff --git a/tests/playTests.sh b/tests/playTests.sh
index 9b3915a..6c26b22 100755
--- a/tests/playTests.sh
+++ b/tests/playTests.sh
@@ -748,17 +748,17 @@
./datagen -g2MB > tmp
refSize=$($ZSTD tmp -6 -c --zstd=wlog=18 | wc -c)
ov9Size=$($ZSTD tmp -6 -c --zstd=wlog=18,ovlog=9 | wc -c)
- ov0Size=$($ZSTD tmp -6 -c --zstd=wlog=18,ovlog=0 | wc -c)
+ ov1Size=$($ZSTD tmp -6 -c --zstd=wlog=18,ovlog=1 | wc -c)
if [ $refSize -eq $ov9Size ]; then
echo ov9Size should be different from refSize
exit 1
fi
- if [ $refSize -eq $ov0Size ]; then
- echo ov0Size should be different from refSize
+ if [ $refSize -eq $ov1Size ]; then
+ echo ov1Size should be different from refSize
exit 1
fi
- if [ $ov9Size -ge $ov0Size ]; then
- echo ov9Size=$ov9Size should be smaller than ov0Size=$ov0Size
+ if [ $ov9Size -ge $ov1Size ]; then
+ echo ov9Size=$ov9Size should be smaller than ov1Size=$ov1Size
exit 1
fi
