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iscsi-perf: use a common iovec for all requests

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this avoids a lot of unnecessary mallocs and frees.

Signed-off-by: Peter Lieven <pl@kamp.de>
This commit is contained in:
Peter Lieven
2015-03-26 11:08:31 +01:00
parent fe265aef9c
commit 44b1a2e1e0
1 changed files with 13 additions and 1 deletions
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14
utils/iscsi-perf.c
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@@ -45,6 +45,8 @@ struct client {
int random;
struct iscsi_context *iscsi;
struct scsi_iovec perf_iov;
int lun;
int blocksize;
uint64_t num_blocks;
@@ -133,6 +135,7 @@ void cb(struct iscsi_context *iscsi _U_, int status, void *command_data, void *p
fprintf(stderr, "failed to send read16 command\n");
client->err_cnt++;
}
scsi_task_set_iov_in(task2, &client->perf_iov, 1);
if (status == SCSI_STATUS_BUSY) {
client->busy_cnt++;
}
@@ -184,12 +187,12 @@ void fill_read_queue(struct client *client)
num_blocks * client->blocksize,
client->blocksize, 0, 0, 0, 0, 0,
cb, client);
if (task == NULL) {
fprintf(stderr, "failed to send read16 command\n");
iscsi_destroy_context(client->iscsi);
exit(10);
}
scsi_task_set_iov_in(task, &client->perf_iov, 1);
client->pos += num_blocks;
}
}
@@ -311,6 +314,13 @@ int main(int argc, char *argv[])
scsi_free_scsi_task(task);
client.perf_iov.iov_base = malloc(blocks_per_io * client.blocksize);
if (!client.perf_iov.iov_base) {
fprintf(stderr, "Out of Memory\n");
exit(10);
}
client.perf_iov.iov_len = blocks_per_io * client.blocksize;
printf("capacity is %" PRIu64 " blocks or %" PRIu64 " byte (%" PRIu64 " MB)\n", client.num_blocks, client.num_blocks * client.blocksize,
(client.num_blocks * client.blocksize) >> 20);
@@ -360,6 +370,8 @@ int main(int argc, char *argv[])
}
iscsi_destroy_context(client.iscsi);
free(client.perf_iov.iov_base);
return client.err_cnt ? 1 : 0;
}