The code that deals with timer creation for the WDT was moved to clock.c
and is called with the few relevant arguments. This removes the need for
awareness of clock_id from wdt.c and as such saves us from having to
share it outside. The timer_t is also known only from both ends but not
from the public API so that we don't have to create a fake timer_t
anymore on systems which do not support it (e.g. macos).
This was previously open-coded in run_thread_poll_loop(). Now that
we have clock.c dedicated to such stuff, let's move the code there
so that we don't need to keep such ifdefs nor to depend on the
clock_id.
Instead of fiddling with before_poll and after_poll in
activity_count_runtime(), the function is now called by
clock_entering_poll() which passes it the number of microseconds
spent working. This allows to remove all calls to
activity_count_runtime() from the pollers.
The entering_poll/leaving_poll/measure_idle functions that were hard
to classify and used to move to various locations have now been placed
into clock.c since it's precisely about time-keeping. The functions
were renamed to clock_*. The samp_time and idle_time values are now
static since there is no reason for them to be read from outside.
There is currently a problem related to time keeping. We're mixing
the functions to perform calculations with the os-dependent code
needed to retrieve and adjust the local time.
This patch extracts from time.{c,h} the parts that are solely dedicated
to time keeping. These are the "now" or "before_poll" variables for
example, as well as the various now_*() functions that make use of
gettimeofday() and clock_gettime() to retrieve the current time.
The "tv_*" functions moved there were also more appropriately renamed
to "clock_*".
Other parts used to compute stolen time are in other files, they will
have to be picked next.
It was brought by a variable declared after some statements in commit
21185970c ("MINOR: proc: setting the process to produce a core dump on
FreeBSD."). It's worth noting that some versions of clang seem to ignore
-Wdeclaration-after-statement by default. No backport is needed.
Remove unused code in mux-quic. This is mostly code related to the
backend side. This code is untested for the moment, its removal will
simplify the code maintenance.
Remove an unneeded strdup invocation during QPACK huffman decoding. A
temporary storage buffer is passed by the function and exists after
decoding so no need to duplicate memory here.
We've found others places where the read0 is ignored because of an
incomplete frame parsing. This time, it happens during parsing of
CONTINUATION frames.
When frames are parsed, incomplete frames are properly handled and
H2_CF_DEM_SHORT_READ flag is set. It is also true for HEADERS
frames. However, for CONTINUATION frames, there is an exception. Besides
parsing the current frame, we try to peek header of the next one to merge
payload of both frames, the current one and the next one. Idea is to create
a sole HEADERS frame before parsing the payload. However, in this case, it
is possible to have an incomplete frame too, not the current one but the
next one. From the demux point of view, the current frame is complete. We
must go to the internal function h2c_decode_headers() to detect an
incomplete frame. And this case was not identified and fixed when
H2_CF_DEM_SHORT_READ flag was introduced in the commit b5f7b5296
("BUG/MEDIUM: mux-h2: Handle remaining read0 cases on partial frames")
This bug was reported in a comment of the issue #1362. The patch must be
backported as far as 2.0.
Remove the quic_conn from the receiver connection_ids tree on
quic_conn_free. This fixes a crash due to dangling references in the
tree after a quic connection release.
This operation must be conducted under the listener lock. For this
reason, the quic_conn now contains a reference to its attached listener.
Use the count of bidirectional streams to call qc_release in qc_detach.
We cannot inspect the by_id tree because uni-streams are never removed
from it. This allows the connection to be properly freed.
It is required that all qcs streams are in the by_id tree for the xprt
to function correctly. Without this, some ACKs are not properly emitted
by xprt.
Note that this change breaks the free of the connection because the
condition eb_is_empty in qc_detach is always true. This will be fixed in
a following patch.
It seems it was a bad idea to use the same function as for TCP ssl sockets
to initialize the SSL session objects for QUIC with ssl_bio_and_sess_init().
Indeed, this had as very bad side effects to generate SSL errors due
to the fact that such BIOs initialized for QUIC could not finally be controlled
via the BIO_ctrl*() API, especially BIO_ctrl() function used by very much other
internal OpenSSL functions (BIO_push(), BIO_pop() etc).
Others OpenSSL base QUIC implementation do not use at all BIOs to configure
QUIC connections. So, we decided to proceed the same way as ngtcp2 for instance:
only initialize an SSL object and call SSL_set_quic_method() to set its
underlying method. Note that calling this function silently disable this option:
SSL_OP_ENABLE_MIDDLEBOX_COMPAT.
We implement qc_ssl_sess_init() to initialize SSL sessions for QUIC connections
to do so with a retry in case of allocation failure as this is done by
ssl_bio_and_sess_init(). We also modify the code part for haproxy servers.
The "show pools" command provides some "allocated" and "used" estimates
on the pools objects, but this applies to the shared pool and the "used"
includes what is currently assigned to thread-local caches. It's possible
to know how much each thread uses, so let's dump the total size allocated
by thread caches as an estimate. It's only done when pools are enabled,
which explains why the patch adds quite a lot of ifdefs.
These ones are rarely used or only to waste CPU cycles waiting, and are
the last ones requiring system includes in thread.h. Let's uninline them
and move them to thread.c.
This removes the thread identifiers from struct thread_info and moves
them only in static array in thread.c since it's now the only file that
needs to touch it. It's also the only file that needs to include
pthread.h, beyond haproxy.c which needs it to start the poll loop. As
a result, much less system includes are needed and the LoC reduced by
around 3%.
haproxy.c still has to deal with pthread-specific low-level stuff that
is OS-dependent. We should not have to deal with this there, and we do
not need to access pthread anywhere else.
Let's move these 3 functions to thread.c and keep empty inline ones for
when threads are disabled.
It's not needed to inline it at all (one call per loop) and it introduces
dependencies, let's move it to fd.c.
Removing the few remaining includes that came with it further reduced
by ~0.2% the LoC and the build time is now below 6s.
It's pointless to inline this, it's called exactly once per poll loop,
and it depends on time.h which is quite deep. Let's move that to task.c
along with sched_report_idle().
The remaining large functions are those allocating/initializing and
occasionally freeing connections, conn_streams and sockaddr. Let's
move them to connection.c. In fact, cs_free() is the only one-liner
but let's move it along with the other ones since a call will be
small compared to the rest of the work done there.
The following inlined functions are particularly large (and probably not
inlined at all by the compiler), and together represent roughly half of
the file, while they're used at most once per connection. They were moved
to connection.c.
conn_upgrade_mux_fe, conn_install_mux_fe, conn_install_mux_be,
conn_install_mux_chk, conn_delete_from_tree, conn_init, conn_new,
conn_free
The following functions are quite heavy and have no reason to be kept
inlined:
srv_release_conn, srv_lookup_conn, srv_lookup_conn_next,
srv_add_to_idle_list
They were moved to server.c. It's worth noting that they're a bit
at the edge between server and connection and that maybe we could
create an idle-conn file for these in the near future.
We do not really need to have them inlined, and having xxhash.h included
by connection.h results in this 4700-lines file being processed 101 times
over the whole project, which accounts for 13.5% of the total size!
Additionally, half of the functions are only needed from connection.c.
Let's move the functions there and get rid of the painful include.
The build time is now down to 6.2s just due to this.
The hash type stored everywhere is XXH64_hash_t, which annoyingly forces
everyone to include the huge xxhash file. We know it's an uint64_t because
that's its purpose and the type is only made to abstract it on machines
where uint64_t is not availble. Let's switch the type to uint64_t
everywhere and avoid including xxhash from the type file.
This one is expensive in code size because it comes with xxhash.h at a
low level of dependency that's inherited at plenty of places, and for
a function does doesn't benefit from inlining and could possibly even
benefit from not being inline given that it's large and called from the
scheduler.
Moving it to activity.c reduces the LoC by 1.2% and the binary size by
~1kB.
This function has no reason for being inlined, it's called from non
critical places (once in pollers), is quite large and comes with
dependencies (time and freq_ctr). Let's move it to acitvity.c. That's
another 0.4% less LoC to build.
The idle time calculation stuff was moved to task.h by commit 6dfab112e
("REORG: sched: move idle time calculation from time.h to task.h") but
these two variables that are only maintained by task.{c,h} were still
left in time.{c,h}. They have to move as well.
These ones require openssl and are only built when it's enabled. There's
no point keeping them in sample.c when ssl_sample.c already deals with this
and the required includes. This also allows to remove openssl-compat.h
from sample.c and to further reduce the number of inclusions of openssl
includes, and the build time is now down to under 8 seconds.
These two counters were the only ones not in the global struct, while
the SSL freq counters or the req counts are already in it, this forces
stats.c to include ssl_sock just to know about them. Let's move them
over there with their friends. This reduces from 408 to 384 the number
of includes of opensslconf.h.
This one has nothing to do with ssl_sock as it manipulates the struct
server only. Let's move it to server.c and remove unneeded dependencies
on ssl_sock.h. This further reduces by 10% the number of includes of
opensslconf.h and by 0.5% the number of compiled lines.
This one doesn't use anything from an SSL context, it only checks the
type of the transport layer of a connection, thus it belongs to
connection.h. This is particularly visible due to all the ifdefs
around it in various call places.
These functions have no reason for being inlined, and they require some
includes with long dependencies. Let's move them to listener.c and trim
unused includes in listener.h.
The lock-debugging code in thread.h has no reason to be inlined. the
functions are quite fat and perform a lot of operations so there's no
saving keeping them inlined. Worse, most of them are in fact not
inlined, resulting in a significantly bigger executable.
This patch moves all this part from thread.h to thread.c. The functions
are still exported in thread.h of course. This results in ~166kB less
code:
text data bss dec hex filename
3165938 99424 897376 4162738 3f84b2 haproxy-before
2991987 99424 897376 3988787 3cdd33 haproxy-after
In addition the build time with thread debugging enabled has shrunk
from 19.2 to 17.7s thanks to much less code to be parsed in thread.h
that is included virtually everywhere.
pool-os.h relies on a number of includes solely because the
pool_alloc_area() function was inlined, and this only because we want
the normal version to be inlined so that we can track the calling
places for the memory profiler. It's worth noting that it already
does not work at -O0, and that when UAF is enabled we don't care a
dime about profiling.
This patch does two things at once:
- force-inline the functions so that pool_alloc_area() is still
inlined at -O0 to help track malloc() users ;
- uninline the UAF version of these (that rely on mmap/munmap)
and move them to pools.c so that we can remove all unneeded
includes.
Doing so reduces by ~270kB or 0.15% the total build size.
A number of files currently access activity counters but rely on their
definitions to be inherited from other files (task.c, backend.c hlua.c,
sock.c, pool.c, stats.c, fd.c).
