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| author | Ivan Maidanski <ivmai@mail.ru> | 2020-08-13 16:49:03 +0300 |
|---|---|---|
| committer | Ivan Maidanski <ivmai@mail.ru> | 2020-08-13 16:49:03 +0300 |
| commit | ee900ca80085032156573517998c6cbfa1494377 (patch) | |
| tree | 49be4fcf55373bfb8603f8b751564d3dab7a8ba7 /doc | |
| parent | 1465f95018cacd77a1654f4a07ed2c051b1da821 (diff) | |
| download | bdwgc-ee900ca80085032156573517998c6cbfa1494377.tar.gz | |
New API (GC_set_markers_count) to control number of parallel markers
Issue #320 (bdwgc).
Note that GC_set_markers_count() has effect only if called before GC
initialization. For convenience, alternatively the client could define
GC_MARKERS macro with the appropriate value before include of gc.h.
* doc/README.macros (GC_MARKERS): Document.
* include/gc.h [GC_THREADS] (GC_parallel): Update comment.
* include/gc.h [GC_THREADS] (GC_set_markers_count): New API function
declaration.
* include/gc.h (GC_INIT_CONF_MARKERS): New internal macro (defined to
GC_set_markers_count(GC_MARKERS) if GC_THREADS and GC_MARKERS are
defined).
* include/gc.h (GC_INIT): Call GC_INIT_CONF_MARKERS before GC_init.
* pthread_support.c [PARALLEL_MARK] (required_markers_cnt): New static
variable (initialized to 0).
* win32_threads.c [PARALLEL_MARK] (required_markers_cnt): Likewise.
* pthread_support.c (GC_set_markers_count): New API function definition
(empty unless PARALLEL_MARK).
* win32_threads.c [PARALLEL_MARK] (GC_set_markers_count): Likewise.
* pthread_support.c [PARALLEL_MARK] (GC_thr_init): Initialize markers
local variable to required_markers_cnt; set markers to GC_nprocs only
if markers_string is null and required_markers_cnt (markers) value is
zero.
* tests/test.c [GC_PTHREADS] (main): Call GC_set_markers_count(0)
before GC_COND_INIT().
* win32_threads.c [PARALLEL_MARK] (GC_thr_init): Initialize markers
local variable to required_markers_cnt; set markers to ncpu only if
markers_string is null and required_markers_cnt (markers) value is 0.
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/README.macros | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/README.macros b/doc/README.macros index 1fd1f321..247b4154 100644 --- a/doc/README.macros +++ b/doc/README.macros @@ -87,6 +87,10 @@ GC_NOT_DLL User-settable macro that overrides _DLL, e.g. if runtime dynamic libraries are used, but the collector is in a static library. Tested by gc_config_macros.h. +GC_MARKERS=<n> Set the desired number of marker threads. If not defined or + defined to zero, then the collector decides based on the + number of CPU cores. Only if compiled with PARALLEL_MARK. + These define arguments influence the collector configuration: |