Updated FAQ document for the new 'number of instances' algorithm.
This commit is contained in:
parent
431bf4b9ff
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doc/FAQ.html
44
doc/FAQ.html
@ -36,7 +36,7 @@ a:visited { color: #0000EE; }
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<li><a href="#df406578">The LameXP startup (splash screen) takes very long on my system. What can I do?</a>
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<li><a href="#900a2a6c">Is there a way to hide/show the LameXP console ("DOS Box") window?</a>
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<li><a href="#9b0a5c32">Why does application 'xyz' not open the Wave files created by LameXP?</a>
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<li><a href="#89cbd3d0">Why does LameXP run only 'n' parallel instances/threads on my computer?</a>
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<li><a href="#89cbd3d0">Why does LameXP run (only) N instances/threads in parallel on my computer?</a>
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<li><a href="#12d077d5">How can I force LameXP to create ID3 version 2 (ID3v2) tags?</a>
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<li><a href="#d83ab3c6">Why does LameXP use LAME v3.99 rather than v3.98?</a><br>
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<li><a href="#4213adbc">Can LameXP be used to convert/extract tracks from an Audio CD?</a>
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@ -464,22 +464,38 @@ You can use a command-line like this:<br>
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<br><br>
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<a name="89cbd3d0"></a><b>Why does LameXP run only 'n' parallel instances/threads on my computer?</b><br>
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<a name="89cbd3d0"></a><b>Why does LameXP run (only) N instances/threads in parallel on my computer?</b><br>
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<br>
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By default LameXP will detect the number of CPU cores that are available on your system and run as many<br>
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encoder/decoder instances in parallel as CPU cores are available. This is done in order to maximize the CPU<br>
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usage on modern multi-core processors and thus speed up the overall encoding process. However be aware that<br>
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the number of instances that can run in parallel is also limited by the number of files you are converting.<br>
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Consequently the number of instances that will run in parallel is the minimum(!) of the number of CPU cores<br>
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and the number of files to convert. Moreover the number of parallel instances is currently bounded at four!<br>
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LameXP is able to run multiple instances of the encoder or decoder in parallel. This is done in order to<br>
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maximize the CPU utilization on modern "multi-core" processors, which will significantly speed up the overall<br>
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encoding process. However be aware that LameXP uses file-based parallelization. This means that the maximum<br>
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number of instances that can run in parallel is limited by the number of files that are processed. If, for<br>
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example, you convert only a single file, then NO parallelization will be possible. If, instead, you convert<br>
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multiple files at once, then LameXP can run as many instances in parallel as files are being converted.<br>
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<br>
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Limiting the maximum number of parallel instances to exactly four might seem somewhat arbitrary. But the more<br>
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instances are running in parallel, the more instances will be competing for the hard disk. At some point this<br>
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will result in "HDD trashing" and actually slow down the encoding process! The limit will prevent this<br>
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situation on computers with a lot of CPU cores. If, however, you want to use even more (or fewer) instances,<br>
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then you can use LameXP's option to manually overwrite the maximum number of parallel instances/threads.<br>
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Within the aforementioned limitations, LameXP will selected the number of parallel instances based on the<br>
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number of available processors (CPU cores) on the individual system. However LameXP will NOT use a one-to-one<br>
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mapping! Instead a custom-made 'cubic spline' function is used to map the number of CPU cores to the maximum<br>
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number of instances. This function has the following properties: On systems with at most four CPU cores, the<br>
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maximum number of parallel instances will be identical to the number of CPU cores. On systems with eight CPU<br>
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cores, the maximum number of parallel instances is six. On systems with 16 cores, the maximum number of<br>
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parallel instances is eight. On systems with 32 cores, the maximum number of parallel instances is ten. And<br>
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on systems with 64 cores, the maximum number of parallel instances is twelve. Twelve is the upper limit.<br>
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<br>
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Also be aware that LameXP only controls the number of instances that will run in parallel, but it does NOT<br>
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<a href="http://img265.imageshack.us/img265/9200/cpucoresmapping.png" target="_blank"><img src="http://img265.imageshack.us/img265/9200/cpucoresmapping.th.png" border="0" alt="thumb"></a><br>
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<br>
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You may wonder why LameXP doesn't always create one instance for each CPU core. In theory, the more instances<br>
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we create, the more CPU cores can be utilized. In reality, however, there are more "shared" resources on the<br>
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computer. And, the more instances we run in parallel, the more processes will be competing for the shared<br>
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resources! More specifically, the amount of main memory (RAM) is limited. Creating a huge number of instances<br>
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in parallel can easily use up all RAM, which will cause the operating system to make heavy use of the page<br>
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file. This can result in HDD thrasing and may significantly hurt the overall performance! But even when there<br>
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is enough RAM available on the system, each encoder or decoder instance needs to access the HDD, e.g. for<br>
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reading the input file and for writing the output file. Thus too many instances will cause an I/O bottleneck!<br>
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If, however, you think that LameXP's choice of the number of parallel instances is too conservative, you may<br>
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overwrite the number of parallel instances on the "Advanced Options" tab. The upper limit is 16.<br>
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<br>
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Finally, note that LameXP only controls the number of instances that will run in parallel, but it does NOT<br>
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control how many threads an individual instance will create! Some encoders use "built-in" multi-threading and<br>
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thus a single encoder instance may create several threads - LameXP has no control over that.<br><br>
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@ -2633,114 +2633,114 @@
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="147"/>
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<location filename="../../src/Dialog_Processing.cpp" line="152"/>
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<source>Show details for selected job</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="148"/>
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<location filename="../../src/Dialog_Processing.cpp" line="153"/>
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<source>Browse Output File Location</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="166"/>
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<location filename="../../src/Dialog_Processing.cpp" line="171"/>
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<source>Encoding Files</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="166"/>
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<location filename="../../src/Dialog_Processing.cpp" line="171"/>
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<source>Your files are being encoded, please be patient...</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="327"/>
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<location filename="../../src/Dialog_Processing.cpp" line="332"/>
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<source>Encoding files, please wait...</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="370"/>
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<location filename="../../src/Dialog_Processing.cpp" line="375"/>
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<source>Multi-threading enabled: Running %1 instances in parallel!</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="384"/>
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<location filename="../../src/Dialog_Processing.cpp" line="389"/>
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<source>Aborted! Waiting for running jobs to terminate...</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="399"/>
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<location filename="../../src/Dialog_Processing.cpp" line="404"/>
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<source>Encoding: %1 files of %2 completed so far, please wait...</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="427"/>
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<location filename="../../src/Dialog_Processing.cpp" line="432"/>
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<source>Creating the playlist file, please wait...</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="437"/>
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<location filename="../../src/Dialog_Processing.cpp" line="442"/>
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<source>Process was aborted by the user after %1 file(s)!</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="437"/>
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<location filename="../../src/Dialog_Processing.cpp" line="442"/>
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<source>Process was aborted prematurely by the user!</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="438"/>
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<location filename="../../src/Dialog_Processing.cpp" line="443"/>
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<source>LameXP - Aborted</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="438"/>
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<location filename="../../src/Dialog_Processing.cpp" line="443"/>
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<source>Process was aborted by the user.</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="450"/>
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<location filename="../../src/Dialog_Processing.cpp" line="455"/>
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<source>Error: %1 of %2 files failed. Double-click failed items for detailed information!</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="451"/>
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<location filename="../../src/Dialog_Processing.cpp" line="456"/>
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<source>LameXP - Error</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="451"/>
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<location filename="../../src/Dialog_Processing.cpp" line="456"/>
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<source>At least one file has failed!</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="461"/>
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<location filename="../../src/Dialog_Processing.cpp" line="462"/>
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<location filename="../../src/Dialog_Processing.cpp" line="466"/>
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<location filename="../../src/Dialog_Processing.cpp" line="467"/>
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<source>All files completed successfully.</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="462"/>
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<location filename="../../src/Dialog_Processing.cpp" line="467"/>
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<source>LameXP - Done</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="859"/>
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<location filename="../../src/Dialog_Processing.cpp" line="864"/>
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<source>Playlist creation failed</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="859"/>
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<location filename="../../src/Dialog_Processing.cpp" line="864"/>
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<source>The playlist file could not be created:</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="929"/>
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<location filename="../../src/Dialog_Processing.cpp" line="934"/>
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<source>Warning: Computer will shutdown in %1 seconds...</source>
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<translation type="unfinished"></translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="933"/>
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<location filename="../../src/Dialog_Processing.cpp" line="934"/>
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<location filename="../../src/Dialog_Processing.cpp" line="938"/>
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<location filename="../../src/Dialog_Processing.cpp" line="939"/>
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<source>Cancel Shutdown</source>
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<translation type="unfinished"></translation>
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</message>
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@ -2633,114 +2633,114 @@
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<translation type="unfinished">Powrót</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="147"/>
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<location filename="../../src/Dialog_Processing.cpp" line="152"/>
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<source>Show details for selected job</source>
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<translation type="unfinished">Pokaż szczegóły wybranego zadania</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="148"/>
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<location filename="../../src/Dialog_Processing.cpp" line="153"/>
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<source>Browse Output File Location</source>
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<translation type="unfinished">Wybierz lokalizację dla plików wyjściowych</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="166"/>
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<location filename="../../src/Dialog_Processing.cpp" line="171"/>
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<source>Encoding Files</source>
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<translation type="unfinished">Kompresowanie plików</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="166"/>
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<location filename="../../src/Dialog_Processing.cpp" line="171"/>
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<source>Your files are being encoded, please be patient...</source>
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<translation type="unfinished">Twoje pliki są właśnie kompresowane, prosze być cierpliwy...</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="327"/>
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<location filename="../../src/Dialog_Processing.cpp" line="332"/>
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<source>Encoding files, please wait...</source>
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<translation type="unfinished">Kompresowanie plików, prosze czekać...</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="370"/>
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<location filename="../../src/Dialog_Processing.cpp" line="375"/>
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<source>Multi-threading enabled: Running %1 instances in parallel!</source>
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<translation type="unfinished">Wielowątkowosć włączona: Równolegle wykonywanych jest %1 kodowań!</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="384"/>
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<location filename="../../src/Dialog_Processing.cpp" line="389"/>
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<source>Aborted! Waiting for running jobs to terminate...</source>
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<translation type="unfinished">Przerwano! Czekanie na wyłączenie procesu...</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="399"/>
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<location filename="../../src/Dialog_Processing.cpp" line="404"/>
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<source>Encoding: %1 files of %2 completed so far, please wait...</source>
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<translation type="unfinished">Kompresja: Prosze czekać, jak dotąd wykonano %1 z %2 plików...</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="427"/>
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<location filename="../../src/Dialog_Processing.cpp" line="432"/>
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<source>Creating the playlist file, please wait...</source>
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<translation type="unfinished">Tworzenie pliku playlisty, prosze czekać...</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="437"/>
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<location filename="../../src/Dialog_Processing.cpp" line="442"/>
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<source>Process was aborted by the user after %1 file(s)!</source>
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<translation type="unfinished">Proces został przerwany przez użytkownika po wykonaniu %1 plików!</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="437"/>
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<location filename="../../src/Dialog_Processing.cpp" line="442"/>
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<source>Process was aborted prematurely by the user!</source>
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<translation type="unfinished">Proces został przedwcześnie zakończony przez użytkownika!</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="438"/>
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<location filename="../../src/Dialog_Processing.cpp" line="443"/>
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<source>LameXP - Aborted</source>
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<translation type="unfinished">LameXP - Przerwano</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="438"/>
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<location filename="../../src/Dialog_Processing.cpp" line="443"/>
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<source>Process was aborted by the user.</source>
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<translation type="unfinished">Proces został przerwany przez użytkownika.</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="450"/>
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<location filename="../../src/Dialog_Processing.cpp" line="455"/>
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<source>Error: %1 of %2 files failed. Double-click failed items for detailed information!</source>
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<translation type="unfinished">Błąd: %1 z %2 plików nie zostało skompresowanych. Kliknij dwukrotnie na plik aby zobaczyć szczegóły!</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="451"/>
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<location filename="../../src/Dialog_Processing.cpp" line="456"/>
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<source>LameXP - Error</source>
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<translation type="unfinished">LameXP - Błąd</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="451"/>
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<location filename="../../src/Dialog_Processing.cpp" line="456"/>
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<source>At least one file has failed!</source>
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<translation type="unfinished">Przynajmniej jeden plik nie został skompresowany!</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="461"/>
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<location filename="../../src/Dialog_Processing.cpp" line="462"/>
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<location filename="../../src/Dialog_Processing.cpp" line="466"/>
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<location filename="../../src/Dialog_Processing.cpp" line="467"/>
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<source>All files completed successfully.</source>
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<translation type="unfinished">Kompresja wszystkich plików zakończona powodzeniem.</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="462"/>
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<location filename="../../src/Dialog_Processing.cpp" line="467"/>
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<source>LameXP - Done</source>
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<translation type="unfinished">LameXP - Zrobione</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="859"/>
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<location filename="../../src/Dialog_Processing.cpp" line="864"/>
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<source>Playlist creation failed</source>
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<translation type="unfinished">Tworzenie playlisty zakończone niepowodzeniem</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="859"/>
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<location filename="../../src/Dialog_Processing.cpp" line="864"/>
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<source>The playlist file could not be created:</source>
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<translation type="unfinished">Playlista nie mogła zostać utworzona:</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="929"/>
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<location filename="../../src/Dialog_Processing.cpp" line="934"/>
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<source>Warning: Computer will shutdown in %1 seconds...</source>
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<translation type="unfinished">Ostrzeżenie: Komputer zostanie zamknięty za %1 sekund/y...</translation>
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</message>
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<message>
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<location filename="../../src/Dialog_Processing.cpp" line="933"/>
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<location filename="../../src/Dialog_Processing.cpp" line="934"/>
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<location filename="../../src/Dialog_Processing.cpp" line="938"/>
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<location filename="../../src/Dialog_Processing.cpp" line="939"/>
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<source>Cancel Shutdown</source>
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<translation type="unfinished">Anuluj wyłączenie komputera</translation>
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</message>
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@ -29,8 +29,8 @@
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#define VER_LAMEXP_MINOR_HI 0
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#define VER_LAMEXP_MINOR_LO 4
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#define VER_LAMEXP_TYPE Alpha
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#define VER_LAMEXP_PATCH 3
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#define VER_LAMEXP_BUILD 791
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#define VER_LAMEXP_PATCH 4
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#define VER_LAMEXP_BUILD 792
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///////////////////////////////////////////////////////////////////////////////
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// Tool versions (minimum expected versions!)
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Loading…
Reference in New Issue
Block a user