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2023-02-03Libnetdata readmes learn (#14416)Chris Akritidis
* Add remaining libnetdata readmes to learn * Move all libnetdata readmes in learn under Developer/libnetdata libraries except for the main README * Add the moved array allocator
2023-01-30Revert "Add libnetdata readmes to learn, delete empty" (#14373)Chris Akritidis
Revert "Add libnetdata readmes to learn, delete empty (#14371)" This reverts commit a2fa9180c567395752b57df1895d677fe129a790.
2023-01-30Add libnetdata readmes to learn, delete empty (#14371)Chris Akritidis
Co-authored-by: Christopher Akritidis <cakrit@DESKTOP-C7OKV71.localdomain>
2023-01-20track memory footprint of Netdata (#14294)Costa Tsaousis
* track memory footprint of Netdata * track db modes alloc/ram/save/map * track system info; track sender and receiver * fixes * more fixes * track workers memory, onewayalloc memory; unify judyhs size estimation * track replication structures and buffers * Properly clear host RRDHOST_FLAG_METADATA_UPDATE flag * flush the replication buffer every 1000 times the circular buffer is found empty * dont take timestamp too frequently in sender loop * sender buffers are not used by the same thread as the sender, so they were never recreated - fixed it * free sender thread buffer on replication threads when replication is idle * use the last sender flag as a timestamp of the last buffer recreation * free cbuffer before reconnecting * recreate cbuffer on every flush * timings for journal v2 loading * inlining of metric and cache functions * aral likely/unlikely * free left-over thread buffers * fix NULL pointer dereference in replication * free sender thread buffer on sender thread too * mark ctx as used before flushing * better logging on ctx datafiles closing Co-authored-by: Stelios Fragkakis <52996999+stelfrag@users.noreply.github.com>
2022-12-03Fix __atomic_compare_exchange_n() atomics (#14085)Costa Tsaousis
* proper use for atomic_compare_exchange() * diskspace plugin is multi-threaded but it uses single threaded dictionaries
2022-10-25Use print macros (#13876)Emmanuel Vasilakis
* use print macros * cast instead
2022-10-09Remove extern from function declared in headers. (#13790)vkalintiris
By default functions are declared as extern in C/C++ headers. The goal of this PR is to reduce the wall of text that many headers have and, more importantly, to make the declaration of extern'd variables - of which we have many dispersed in various places - easily and quickly identifiable. Automatically generated with: $ git grep -l '^extern.*(' '**.h' | \ grep -v libjudy | \ grep -v 'sqlite3.h' | \ xargs sed -i -e 's/extern \(.*(.*$\)/\1/' This is a NFC.
2022-09-20dictionary updated documentation and cosmetics (#13679)Costa Tsaousis
* dictionary updated documentation and cosmetics * improved dictionaries views unit test
2022-09-19RRD structures managed by dictionaries (#13646)Costa Tsaousis
* rrdset - in progress * rrdset optimal constructor; rrdset conflict * rrdset final touches * re-organization of rrdset object members * prevent use-after-free * dictionary dfe supports also counting of iterations * rrddim managed by dictionary * rrd.h cleanup * DICTIONARY_ITEM now is referencing actual dictionary items in the code * removed rrdset linked list * Revert "removed rrdset linked list" This reverts commit 690d6a588b4b99619c2c5e10f84e8f868ae6def5. * removed rrdset linked list * added comments * Switch chart uuid to static allocation in rrdset Remove unused functions * rrdset_archive() and friends... * always create rrdfamily * enable ml_free_dimension * rrddim_foreach done with dfe * most custom rrddim loops replaced with rrddim_foreach * removed accesses to rrddim->dimensions * removed locks that are no longer needed * rrdsetvar is now managed by the dictionary * set rrdset is rrdsetvar, fixes https://github.com/netdata/netdata/pull/13646#issuecomment-1242574853 * conflict callback of rrdsetvar now properly checks if it has to reset the variable * dictionary registered callbacks accept as first parameter the DICTIONARY_ITEM * dictionary dfe now uses internal counter to report; avoided excess variables defined with dfe * dictionary walkthrough callbacks get dictionary acquired items * dictionary reference counters that can be dupped from zero * added advanced functions for get and del * rrdvar managed by dictionaries * thread safety for rrdsetvar * faster rrdvar initialization * rrdvar string lengths should match in all add, del, get functions * rrdvar internals hidden from the rest of the world * rrdvar is now acquired throughout netdata * hide the internal structures of rrdsetvar * rrdsetvar is now acquired through out netdata * rrddimvar managed by dictionary; rrddimvar linked list removed; rrddimvar structures hidden from the rest of netdata * better error handling * dont create variables if not initialized for health * dont create variables if not initialized for health again * rrdfamily is now managed by dictionaries; references of it are acquired dictionary items * type checking on acquired objects * rrdcalc renaming of functions * type checking for rrdfamily_acquired * rrdcalc managed by dictionaries * rrdcalc double free fix * host rrdvars is always needed * attempt to fix deadlock 1 * attempt to fix deadlock 2 * Remove unused variable * attempt to fix deadlock 3 * snprintfz * rrdcalc index in rrdset fix * Stop storing active charts and computing chart hashes * Remove store active chart function * Remove compute chart hash function * Remove sql_store_chart_hash function * Remove store_active_dimension function * dictionary delayed destruction * formatting and cleanup * zero dictionary base on rrdsetvar * added internal error to log delayed destructions of dictionaries * typo in rrddimvar * added debugging info to dictionary * debug info * fix for rrdcalc keys being empty * remove forgotten unlock * remove deadlock * Switch to metadata version 5 and drop chart_hash chart_hash_map chart_active dimension_active v_chart_hash * SQL cosmetic changes * do not busy wait while destroying a referenced dictionary * remove deadlock * code cleanup; re-organization; * fast cleanup and flushing of dictionaries * number formatting fixes * do not delete configured alerts when archiving a chart * rrddim obsolete linked list management outside dictionaries * removed duplicate contexts call * fix crash when rrdfamily is not initialized * dont keep rrddimvar referenced * properly cleanup rrdvar * removed some locks * Do not attempt to cleanup chart_hash / chart_hash_map * rrdcalctemplate managed by dictionary * register callbacks on the right dictionary * removed some more locks * rrdcalc secondary index replaced with linked-list; rrdcalc labels updates are now executed by health thread * when looking up for an alarm look using both chart id and chart name * host initialization a bit more modular * init rrdlabels on host update * preparation for dictionary views * improved comment * unused variables without internal checks * service threads isolation and worker info * more worker info in service thread * thread cancelability debugging with internal checks * strings data races addressed; fixes https://github.com/netdata/netdata/issues/13647 * dictionary modularization * Remove unused SQL statement definition * unit-tested thread safety of dictionaries; removed data race conditions on dictionaries and strings; dictionaries now can detect if the caller is holds a write lock and automatically all the calls become their unsafe versions; all direct calls to unsafe version is eliminated * remove worker_is_idle() from the exit of service functions, because we lose the lock time between loops * rewritten dictionary to have 2 separate locks, one for indexing and another for traversal * Update collectors/cgroups.plugin/sys_fs_cgroup.c Co-authored-by: Vladimir Kobal <vlad@prokk.net> * Update collectors/cgroups.plugin/sys_fs_cgroup.c Co-authored-by: Vladimir Kobal <vlad@prokk.net> * Update collectors/proc.plugin/proc_net_dev.c Co-authored-by: Vladimir Kobal <vlad@prokk.net> * fix memory leak in rrdset cache_dir * minor dictionary changes * dont use index locks in single threaded * obsolete dict option * rrddim options and flags separation; rrdset_done() optimization to keep array of reference pointers to rrddim; * fix jump on uninitialized value in dictionary; remove double free of cache_dir * addressed codacy findings * removed debugging code * use the private refcount on dictionaries * make dictionary item desctructors work on dictionary destruction; strictier control on dictionary API; proper cleanup sequence on rrddim; * more dictionary statistics * global statistics about dictionary operations, memory, items, callbacks * dictionary support for views - missing the public API * removed warning about unused parameter * chart and context name for cloud * chart and context name for cloud, again * dictionary statistics fixed; first implementation of dictionary views - not currently used * only the master can globally delete an item * context needs netdata prefix * fix context and chart it of spins * fix for host variables when health is not enabled * run garbage collector on item insert too * Fix info message; remove extra "using" * update dict unittest for new placement of garbage collector * we need RRDHOST->rrdvars for maintaining custom host variables * Health initialization needs the host->host_uuid * split STRING to its own files; no code changes other than that * initialize health unconditionally * unit tests do not pollute the global scope with their variables * Skip initialization when creating archived hosts on startup. When a child connects it will initialize properly Co-authored-by: Stelios Fragkakis <52996999+stelfrag@users.noreply.github.com> Co-authored-by: Vladimir Kobal <vlad@prokk.net>
2019-07-24Utf8 Badge Fix And URL Parser International Support (initial) (#6426)Timo
#### Summary Fixes #3117 Additionally it adds support for UTF-8 in URL parser (as it should). Label sizes now are updated by browser with JavaScript (although guess is still calculated by verdana11_widths with minor improvements) #### Component Name API/Badges, LibNetData/URL #### Additional Information It was found that not only verdana11_widths need to be updated but the url parser replaces international characters with spaces (one space per each byte of multibyte character). Therefore I update both to support international chars.