This thorn provides access to the PAPI library.
Refer to the Cactus UserGuide, Sec. B2.2, in order to know how this thorn can be used in a compiled configuration and how to possibly linking another specific version, already installed steparately.
Each thorn contained in Cactus/arrangements/ExternalLibraries will automatically adopt the library version contained in the Cactus/arrangements/<library>/dist folder. In particular, the tarball in Cactus/arrangements/<library>/dist is only used if either THORN_DIR is set to BUILD or is left empty and no precompiled copy of the library is found. If another location is specified via the THORN_DIR variable in the <machine>.cfg file at compilation, then the Cactus/lib/sbin/strip-incdirs.sh script will automatically strip away (for safety reasons) the locations:
from THORN_INC_DIRS which default to THORN_DIR/include. Therefore, if there is any need for using one already installed version of one external library, the aforementioned location should be avoided (e.g. indicating /home as the THORN_DIR will work with no problems if the required library is installed there) or should be carefully checked, in order to avoid unwanted stripping. The same stripping happens to THORN_LIB_DIRS in lib/sbin/strip-libdirs.sh with a larger list of directories:
define_statistics_clocks | Scope: private | BOOLEAN |
Description: Define multiple clocks for each PAPI counter, providing min/max/avg/sdv
| ||
| Default: no | ||
dgemm_n | Scope: private | INT |
Description: Matrix size; mem = 32 N
 bytes, cpu = 2 N flop | ||
| Range | Default: 1000 | |
1:* | N=2000 requires 128 Mbyte and 16 Gflop; N=5000 requires 800 Mbyte and
250 Gflop
| |
events_dcache | Scope: private | STRING |
Description: PAPI events for data cache usage
| ||
| Range | Default: PAPI_L1_DCA PAPI_L1_DCM PAPI_L2_DCA PAPI_L2_DCM PAPI_L3_DCA PAPI_L3_DCM | |
events_flops | Scope: private | STRING |
Description: PAPI events for flop/sec
| ||
| Range | Default: PAPI_FP_OPS PAPI_DP_OPS PAPI_VEC_DP PAPI_TOT_CYC PAPI_REF_CYC SIMD_FP_256:PACKED_DOUBLE | |
events_icache | Scope: private | STRING |
Description: PAPI events for instruction cache usage
| ||
| Range | Default: PAPI_L1_ICA PAPI_L1_ICM PAPI_L2_ICA PAPI_L2_ICM PAPI_L3_ICA PAPI_L3_ICM | |
events_ipc | Scope: private | STRING |
Description: PAPI events for instructions/cycle
| ||
| Range | Default: PAPI_TOT_CYC PAPI_TOT_INS PAPI_FP_INS PAPI_INT_INS | |
events_memory | Scope: private | STRING |
Description: PAPI evens for memory accesses
| ||
| Range | Default: PAPI_LD_INS PAPI_SR_INS PAPI_MEM_RCY PAPI_MEM_WCY | |
out_every | Scope: private | INT |
Description: Output statistics every so many iterations
| ||
| Range | Default: (none) | |
after initial data and shutdown
| ||
1:* | every so many iterations
| |
-1 | no statistics output
| |
per_thread_statistics | Scope: private | BOOLEAN |
Description: Collect statistics per thread (instead of per process)
| ||
| Default: yes | ||
use_multiplexing | Scope: private | BOOLEAN |
Description: Use multiplexing to gather more, but less accurate information
| ||
| Default: yes | ||
verbose | Scope: private | BOOLEAN |
Description: Output debug messages?
| ||
| Default: no | ||
Implements:
papi
This section lists all the variables which are assigned storage by thorn ExternalLibraries/PAPI. Storage can either last for the duration of the run (Always means that if this thorn is activated storage will be assigned, Conditional means that if this thorn is activated storage will be assigned for the duration of the run if some condition is met), or can be turned on for the duration of a schedule function.
NONE
CCTK_WRAGH
papi_init
initialise papi
| Language: | c | |
| Options: | meta | |
| Type: | function | |
CCTK_WRAGH
papi_register_clock
set up cactus clock for papi
| After: | papi_init | |
| Language: | c | |
| Options: | meta | |
| Type: | function | |
CCTK_BASEGRID
papi_dgemm
run a dgemm benchmark to test papi
| Language: | c | |
| Options: | meta | |
| Type: | function | |
CCTK_ANALYSIS
papi_output_stats_analysis
output papi statistics
| Language: | c | |
| Options: | meta | |
| Type: | function | |
CCTK_TERMINATE
papi_output_stats_terminate
output papi statistics
| Language: | c | |
| Options: | meta | |
| Type: | function | |