Glyphs were previously using 3 shared buffers, now reduce to 2:
- Memory pool (mempool) containing the glyph drawable data
- Index table (Shared_Index / array) containing only the
indexes of the buffers in the mempool
- Glyph_Data table (array) containing the glyphs descriptors
AS WELL as the buffer indexes.
So, we just merge the two index tables into one by using directly
objects of type Glyph_Data for the referencing of the mempool
buffers.
One socket message was sent per each glyph used ... which means
a LOT of messages when text is being redrawn.
Reduce this flow of messages by triggering send() only when
50+ items are being used.
Btw, USED is a bit useless as there is no UNUSED equivalent.
Also, slightly improve debug logs.
SIGTERM and SIGQUIT don't need to be caught.
the proper signal to ask cserve2 to exit cleanly is SIGINT.
enlightenment_start (or systemd) should be responsible for
restarting in case of crash / unexpected termination.
cserve2 will not restart if killed with signal SIGINT,
as it will then exit with return code 0 (normal)
These operations have tons of side effects and it's a lot
easier to just avoid doing them. Now, repacking will always
need to happen as applications will add/delete strings and
items, but the less frequent, the better :)
Also, align most arrays & mempools to 32K instead of the
default page size (4K). This will also reduce resizes.
Try to reconnect to cserve2 if the socket connection was lost.
Resend some messages if necessary.
Images reload seems to be working.
Actually, the images don't change over time, so the clients just
keep the previous references to their images.
FONT RELOAD IS NOT WORKING:
- Crashes
- Invalid glyph data
- Infinite loop in _glyph_map_remap_check()
Root cause:
When new glyphs are requested from the server, they are added to
the mempool. So it is necessary to remap the font.
Unfortunately, in case of server reboot, we did not keep the mempool
so the old glyphs that were not requested again will not be valid.
Be more careful when selecting the original image for scaling.
Most load opts must remain the same, only smooth can be toyed with.
Also, fix alpha when scaling.
Let's reuse the logic from scalecache and call cserve2
functions when the scalecache should be used.
So, now, cserve2 server will not scale any image... This is
too computationally intensive for the server's main thread.
This is not optimal but makes a hell of a lot more sense for
the moment. (since cserve2 manages the SHM segments)
High-level problem:
cserve2 does not support load_opts properly when opening an image.
As a result, when (pre)loading a JPEG file with specific load
options (eg. w, h, region and orientation), the image buffer might
have the wrong dimensions.
So, we need to use load_opts when computing file hash key.
And, pass these load options to the loader slave,
and use them while OPENING the image. This will set
properly the geometry.
Fixes test "Preload and Prescale" in elementary_test.
Pass around "animated" flag for images that can be animated.
Fallback to local cache if the image is animated.
Implementing support for animated images in cserve2 does
not seem to make a lot of sense considering each frame must
be requested independently in real time,... and to be honest
there doesn't seem to be any valid use case anyway :)
Images and Files can be discovered by the client scanner before they
are valid (aka. loaded or opened). We want clients to ignore all
shared objects that are not ready yet, as they are in an undefined
state (values and memory might be invalid).
Shared string indexes are not repacked, since they live in a
memory pool (where the indexes can be reused).
So, the index in the table is equal to their ID. Add initial
test to check if the item at index n has the ID n.
Use tags such as INDX, FONT, IMAG, FILE.
These can help debugging and for robustness, as they will
be visible in the memory dump.
Update generation_id after repack as well
Also, print shared arrays usage as it is sent as first message
upon connection to the server.
Add fonts to LRU and flush LRU as needed.
Seems to work okay. Could probably be finetuned a bit.
- Create one Glyph_Data array per Font_Entry
- Copy Font_Source descriptors in shared array
- Copy font entries in shared index
- Send font index path over socket
- Merge Font_Source and Font_Data in shared memory
- Send font index path on client connect
- Repack font index after free
- Pass font shm name to clients
DBG and INF messages pollute the logs and performance reports
from valgrind, let's disable them at build-time for better
benchmarking.
Fix other compilation warnings and clean code a bit
If the client exits while the server is loading fonts,
the font entry objects are accessed after being freed.
Note: This is not a proper fix. The race condition should still
be fixed, but delaying client deletion a bit might help for a while...
- Send paths to all connected clients
- Send paths upon connection from a new client
- Client side:
- Fast find opened images
- Fast find loaded images
- Optimize load by skipping socket wait
Also, remap indexes when needed (file size changed)
When index file grows, the clients are not notified, so they
must constantly check that their mapping matches the current array
size.
- Move required struct definitions to common evas_cs2.h
- Open/close shm and map arrays to memory
Pretty stupid for now as it will close & reopen the shm files
even when unchanged.
- Check shm size and array header consistency
- Implement message send
- Send messages from server when calling repack()
Only import the C file for now.
Implement the following features:
- Shared Arrays
Store arrays of elements of fixed size in shm.
- Shared Mempool
Store random sized buffers in shm.
These buffers are indexed in a Shared Array and are
referred to using their index only.
- Shared Strings
Store strings in a shm in a way similar to Eina_Stringshare
(except strings are referred to using an int index).
- Include evas_cserve2_index.c to the compilation.
- Declare shared index functions in header file.
- Call init() and shutdown() on the shared index subsystem.
- Add find and foreach functions
- cserve2_shm_segment_request()
Creates a new shm segment (Shm_Handle) from an existing file,
without changing the current mmap.
- cserve2_shm_resize()
Grows the file and remaps in memory (new virtual address).
- cserve2_shm_id_get()
Returns the shm creation ID.
Jean-Philippe Andre