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authorEric S. Raymond <esr@thyrsus.com>2009-09-29 07:28:38 +0000
committerEric S. Raymond <esr@thyrsus.com>2009-09-29 07:28:38 +0000
commit1f80e71eb7980861c12198ce3a3aef15ae5f398a (patch)
tree910eee2f07946cc2d8be8c8074ae024daf3719b9 /gpsprof.xml
parent1b547593dff458a8df82c8173762ca62a55a383e (diff)
downloadgpsd-1f80e71eb7980861c12198ce3a3aef15ae5f398a.tar.gz
gpsprof is fully working with the new protocol.
All regression test pass. Codebase splints clean.
Diffstat (limited to 'gpsprof.xml')
-rw-r--r--gpsprof.xml25
1 files changed, 5 insertions, 20 deletions
diff --git a/gpsprof.xml b/gpsprof.xml
index cef7e276..e95f506e 100644
--- a/gpsprof.xml
+++ b/gpsprof.xml
@@ -103,20 +103,11 @@ plain text rather than a gnuplot script.)</para>
<varlistentry>
<term>RS232 time</term>
<listitem>
-<para>Minimum time required to send the sentence from the GPS to
-<application>gpsd</application>. This is computed, not measured,
-and may be an underestimate.</para>
-</listitem>
-</varlistentry>
-<varlistentry>
-<term>Other line latency</term>
-<listitem>
-<para>The transmission latency between the GPS and
-<application>gpsd</application> not accounted for by RS232 time.
-Total line latency (the sum of this bar and RS232 time)
-is measured; it begins with the GPS sentence's timestamp and ends with
-a timestamp that <application>gpsd</application> generates at
-sentence-reading time, before it is decoded.</para>
+<para>Time required to send the sentence from the GPS to
+<application>gpsd</application>. This measured from the time of
+the last zero-length read before the packet to when the packet sniffer
+recognizes a complete sentence, so there is a small aountt of
+computational overhead mixed in.</para>
</listitem>
</varlistentry>
<varlistentry>
@@ -156,12 +147,6 @@ title.</para>
a usage message and exit.</para>
</refsect1>
-<refsect1 id='bugs'><title>BUGS AND LIMITAIONS</title>
-
-<para>Probably overestimates TCP/IP latency somewhat, as that includes the
-Python interpreter's decode time. A C client would be faster.</para>
-
-</refsect1>
<refsect1 id='see_also'><title>SEE ALSO</title>
<para>
<citerefentry><refentrytitle>gpsd</refentrytitle><manvolnum>8</manvolnum></citerefentry>,