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Alessio Podda ed0ecb62e4 Add low contention stats counter 
In the current statistics counter implementation, the statistics are
backed by an array of counters, which are updated via atomic operations.
This leads to contention, especially on high core count
machines.

This commit introduces a new isc_statsmulti_t counter that keeps a
separate array per thread. These counters are then aggregated only when
statistics are queried, shifting work off the critical path.

These changes lead to a ~2% improvement in perflab.
2026-03-26 10:19:25 +01:00
..
crypto wipe hmac keys correctly pre-3.0 libcrypto 2026-02-06 14:14:43 +03:00
include Add low contention stats counter 2026-03-26 10:19:25 +01:00
netmgr Fix isc_buffer_init capacity mismatch in DoH data chunk callback 2026-03-18 11:39:01 +01:00
ossl_wrap explicitly set ec points properties in pre-3.0 openssl 2026-02-02 11:50:14 +03:00
.gitignore Add support for User Statically Defined Tracing (USDT) probes 2023-08-21 18:39:53 +02:00
ascii.c Consolidate some ASCII tables in isc/ascii and isc/hex 2022-09-12 12:18:57 +01:00
assertions.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
async.c Remove unused isc_mutexblock and isc_condition units 2025-03-01 07:33:09 +01:00
async_p.h Change the isc_async API to use cds_wfcqueue internally 2023-05-12 14:16:25 +02:00
backtrace.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
base32.c standardize CHECK and RETERR macros 2025-12-03 13:26:28 -08:00
base64.c Add enum for use with isc_base64_tobuffer and isc_hex_tobuffer 2026-01-27 23:57:34 +11:00
commandline.c switch to RETERR where it wasn't being used 2025-12-03 13:45:43 -08:00
counter.c Cleanup the isc_counter unit 2025-02-21 09:51:42 +00:00
dir.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
errno.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
errno2result.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
errno2result.h Remove C++ support from the public header 2024-12-18 13:10:39 +01:00
error.c Remove do-nothing header <isc/print.h> 2023-02-15 16:44:47 +00:00
file.c Use const pointer with strchr of const pointer 2026-01-20 16:23:58 +11:00
getaddresses.c switch to RETERR where it wasn't being used 2025-12-03 13:45:43 -08:00
hash.c Use arc4random for CSPRNG when available 2025-10-02 13:26:07 +02:00
hashmap.c Use arc4random for CSPRNG when available 2025-10-02 13:26:07 +02:00
heap.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
helper.c Change the loopmgr to be singleton 2025-07-23 22:44:16 +02:00
hex.c Add enum for use with isc_base64_tobuffer and isc_hex_tobuffer 2026-01-27 23:57:34 +11:00
histo.c Use standard reference counting for isc_histomulti 2026-02-26 14:00:10 +00:00
ht.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
httpd.c Clear errno before calling strtol 2026-03-17 10:51:37 +11:00
interfaceiter.c use a standard CLEANUP macro 2025-12-03 13:45:43 -08:00
iterated_hash.c expose isc__crypto_md in isc/ossl_wrap.h 2026-02-02 11:50:14 +03:00
jemalloc_shim.h Provide more information when the memory allocation fails 2025-11-28 14:42:21 +01:00
job.c Use unique names for probes.d files 2025-09-24 13:18:13 +02:00
job_p.h Use proper padding instead of using alignas() 2024-02-08 10:54:35 +01:00
lex.c switch to RETERR where it wasn't being used 2025-12-03 13:45:43 -08:00
lib.c Call rcu_barrier earlier in the destructor 2025-04-25 13:13:44 +02:00
log.c switch to RETERR where it wasn't being used 2025-12-03 13:45:43 -08:00
loop.c Change the loopmgr to be singleton 2025-07-23 22:44:16 +02:00
loop_p.h Change the loopmgr to be singleton 2025-07-23 22:44:16 +02:00
managers.c Cleanup setting netmgr ports from isc_managers_create() 2026-02-20 16:37:44 +01:00
md.c expose isc__crypto_md in isc/ossl_wrap.h 2026-02-02 11:50:14 +03:00
mem.c Provide more information when the memory allocation fails 2025-11-28 14:42:21 +01:00
mem_p.h Update the copyright information in all files in the repository 2022-01-11 09:05:02 +01:00
meminfo.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
meson.build Add low contention stats counter 2026-03-26 10:19:25 +01:00
mutex.c Move the library init and shutdown to executables 2025-02-22 16:19:00 +01:00
mutex_p.h Use library constructor to create default mutex attr once 2022-07-13 13:19:32 +02:00
net.c Rename isc_net_getudpportrange() to isc_net_getportrange() 2026-02-20 14:06:23 +01:00
netaddr.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
netscope.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
openssl_shim.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
openssl_shim.h switch isc_md_type_t to a proper enum 2026-02-02 11:12:55 +03:00
os.c Implement IP_LOCAL_PORT_RANGE socket option for Linux 2026-02-20 14:06:23 +01:00
os_p.h Update the copyright information in all files in the repository 2022-01-11 09:05:02 +01:00
parseint.c switch to RETERR where it wasn't being used 2025-12-03 13:45:43 -08:00
picohttpparser.c Add and apply InsertBraces statement 2025-08-19 07:58:33 +02:00
picohttpparser.h Update picohttpparser.{c,h} with upstream repository 2024-12-08 11:14:37 +00:00
portset.c clean up uses of ISC_R_NOMEMORY 2025-01-23 15:54:57 -08:00
probes-isc.d Use unique names for probes.d files 2025-09-24 13:18:13 +02:00
proxy2.c switch to RETERR where it wasn't being used 2025-12-03 13:45:43 -08:00
quota.c Fix isc_quota bug 2025-02-20 10:56:00 +00:00
radix.c Fix INSIST copy-paste error checking RADIX_V4 instead of RADIX_V6 2026-03-14 11:03:31 +01:00
random.c Use arc4random for CSPRNG when available 2025-10-02 13:26:07 +02:00
ratelimiter.c Use ControlStatementsExceptControlMacros for SpaceBeforeParens 2025-08-19 07:58:33 +02:00
regex.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
region.c Incrementally apply AXFR transfer 2024-11-22 15:00:55 +01:00
result.c Fast fail a validator deadlock 2026-03-16 16:46:51 +00:00
rwlock.c Use unique names for probes.d files 2025-09-24 13:18:13 +02:00
safe.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
serial.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
signal.c Change the loopmgr to be singleton 2025-07-23 22:44:16 +02:00
sockaddr.c switch to RETERR where it wasn't being used 2025-12-03 13:45:43 -08:00
stats.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
statsmulti.c Add low contention stats counter 2026-03-26 10:19:25 +01:00
stdio.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
stdtime.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
string.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
symtab.c Switch symtab to use fxhash hashing 2025-03-20 11:26:09 +01:00
syslog.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
tests Move all the unit tests to /tests/<libname>/ 2022-05-28 14:53:02 -07:00
thread.c Add support for setting thread stack size 2025-08-05 10:46:09 +02:00
thread_p.h Document the current default stack sizes on different systems 2025-08-05 10:46:09 +02:00
tid.c Add ISC_TID_MAX with default being 512 threads 2025-06-28 13:32:12 +02:00
time.c Simplify add/sub/mul overflow checks 2025-08-26 15:32:53 +02:00
timer.c Change the loopmgr to be singleton 2025-07-23 22:44:16 +02:00
tls.c OpenSSL 4 compatibility fix 2026-03-16 10:01:18 +00:00
tm.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
url.c switch to RETERR where it wasn't being used 2025-12-03 13:45:43 -08:00
utf8.c Remove redundant parentheses from the return statement 2024-11-19 12:27:22 +01:00
uv.c ensure file descriptors 0-2 are in use before using libuv 2025-08-28 08:16:06 +02:00
work.c Enforce isc_work enqueue loop affinity 2026-03-14 06:32:50 +01:00
xml.c Change the 'isc_g_mctx' to be always available 2025-08-04 11:29:50 +02:00