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author | Dimitri Staessens <dimitri.staessens@intec.ugent.be> | 2016-03-19 13:40:03 +0100 |
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committer | Dimitri Staessens <dimitri.staessens@intec.ugent.be> | 2016-03-19 13:53:52 +0100 |
commit | 7712e3ea9fc6772b47f593acbe3088cae01c16d2 (patch) | |
tree | 3e0962e8f7bc3957251bbe17ab418c5ebbda555b /src/lib/tests/shm_du_map_test_prod_cons.c | |
parent | 8d2ac4877bb14df8e10d13b61d5db6c5e11d87c3 (diff) | |
download | ouroboros-7712e3ea9fc6772b47f593acbe3088cae01c16d2.tar.gz ouroboros-7712e3ea9fc6772b47f593acbe3088cae01c16d2.zip |
lib: shared memory map
The shared memory map will allow passing SDU's between IPCPs
efficiently. It is a single block of managed memory. SDU's are stored
in a shm_du_buff datastructure, which is a list of blocks inside the
shared memory region. The mechanism for passing SDU's is not yet
implemented and could be either within the region or using another
local IPC mechanism.
The following things are configured at compile time:
SHM_FILE_NAME : the name. Default is "ouroboros_du_map".
SHM_DU_BUFF_BLOCK_SIZE: size of a block inside the shared memory
region. Default is the pagesize of the system.
SHM_DU_MAP_SIZE : the approximate size in bytes of the shared
memory map. The actual filesize may differ by
a small margin. Default is 4MB.
Diffstat (limited to 'src/lib/tests/shm_du_map_test_prod_cons.c')
-rw-r--r-- | src/lib/tests/shm_du_map_test_prod_cons.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/src/lib/tests/shm_du_map_test_prod_cons.c b/src/lib/tests/shm_du_map_test_prod_cons.c new file mode 100644 index 00000000..945104c1 --- /dev/null +++ b/src/lib/tests/shm_du_map_test_prod_cons.c @@ -0,0 +1,179 @@ +/* + * Ouroboros - Copyright (C) 2016 + * + * Test of the Shared Memory Map + * + * Dimitri Staessens <dimitri.staessens@intec.ugent.be> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <ouroboros/shm_du_map.h> +#include <sys/types.h> +#include <stdlib.h> +#include <time.h> +#include <pthread.h> +#include "shm_du_map.c" + +#define TEST_BUFF_SIZE (3 * SHM_DU_BLOCK_DATA_SIZE) + +#define MAX(a,b) (a > b ? a : b) +#define MIN(a,b) (a < b ? a : b) + +int * sync; + +void * produce() +{ + struct shm_du_map * dum; + long test_buf_size = 0; + uint8_t * test_values; + int headspace; + int tailspace; + long i; + long bytes_written = 0; + struct timespec starttime; + struct timespec stoptime; + double elapsed; + long overruns = 0; + + dum = shm_du_map_open(); + if (dum == NULL) + return (void *)-1; + + srand(time(NULL)); + clock_gettime(CLOCK_MONOTONIC, &starttime); + + test_values = malloc (sizeof *test_values * TEST_BUFF_SIZE); + for (i = 0; i < TEST_BUFF_SIZE; i++) + test_values[i] = 170; + + for (i = 0; i < 4 * SHM_BLOCKS_IN_MAP; i++) { + struct shm_du_buff * sdb; + size_t len; + struct timespec ts; + + test_buf_size = rand() % (TEST_BUFF_SIZE - 512) + 512; + + headspace = MAX(4, rand() % 64); + tailspace = MAX(1, rand() % 24); + + ts.tv_sec = 0; + ts.tv_nsec = rand() % 90000; + + len = test_buf_size - (headspace + tailspace); + + sdb = shm_create_du_buff(dum, + test_buf_size, + headspace, + test_values, + len); + + if (sdb != NULL) { + sync[i] = du_buff_ptr_to_idx(dum, sdb); + bytes_written += len; + } + else { + i--; + ++overruns; + ts.tv_nsec = 10000; + nanosleep(&ts, NULL); + } + nanosleep(&ts, NULL); + + if (overruns > 100) { + LOG_INFO("Bugging out due to overruns."); + sync[i+1] = -2; + break; + } + + } + + clock_gettime(CLOCK_MONOTONIC, &stoptime); + elapsed =(stoptime.tv_sec + stoptime.tv_nsec / 1000000000.0) - + (starttime.tv_sec + starttime.tv_nsec / 1000000000.0); + LOG_INFO("%ld bytes written in %.1lf ms = %lf Gb/s", + bytes_written, + elapsed * 1000.0, + bytes_written * 8 / (elapsed * 1000000000)); + + free(test_values); + shm_du_map_close(dum); + return 0; +} + +void * consume() +{ + struct shm_du_map * dum; + + long i; + + struct timespec ts; + + ts.tv_sec = 0; + ts.tv_nsec = 5000; + + dum = shm_du_map_open(); + + if (dum == NULL) + pthread_exit((void *) -1); + + for (i = 0; i < 4 * SHM_BLOCKS_IN_MAP; i++) { + while (sync[i] == -1) + nanosleep(&ts, NULL); /* wait for the producer */ + if (sync[i] == -2) + break; + shm_release_du_buff(dum, idx_to_du_buff_ptr(dum, sync[i])); + } + + shm_du_map_close(dum); + + return 0; +} + +int shm_du_map_test_prod_cons(int argc, char ** argv) +{ + struct shm_du_map * dum; + + int res1; + + int i; + + pthread_t producer; + pthread_t consumer; + + shm_unlink(SHM_DU_MAP_FILENAME); + + dum = shm_du_map_create(); + + if (dum == NULL) + return -1; + + sync = malloc(sizeof *sync * 4 * SHM_BLOCKS_IN_MAP); + + for (i = 0; i < 4 * SHM_BLOCKS_IN_MAP; i++) + sync[i] = -1; + + res1 = (int) pthread_create(&producer, NULL, produce, NULL); + pthread_create(&consumer, NULL, consume, NULL); + + pthread_join(producer, NULL); + pthread_join(consumer, NULL); + + free(sync); + + shm_du_map_close(dum); + + return res1; +} |