diff options
Diffstat (limited to 'test/core/iomgr/ev_epoll_linux_test.c')
| -rw-r--r-- | test/core/iomgr/ev_epoll_linux_test.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/test/core/iomgr/ev_epoll_linux_test.c b/test/core/iomgr/ev_epoll_linux_test.c new file mode 100644 index 0000000000..2547dc9871 --- /dev/null +++ b/test/core/iomgr/ev_epoll_linux_test.c @@ -0,0 +1,244 @@ +/* + * + * Copyright 2015, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ +#include <grpc/support/port_platform.h> + +/* This test only relevant on linux systems where epoll() is available */ +#ifdef GPR_LINUX_EPOLL +#include "src/core/lib/iomgr/ev_epoll_linux.h" +#include "src/core/lib/iomgr/ev_posix.h" + +#include <errno.h> +#include <string.h> +#include <unistd.h> + +#include <grpc/support/alloc.h> +#include <grpc/support/log.h> + +#include "src/core/lib/iomgr/iomgr.h" +#include "test/core/util/test_config.h" + +typedef struct test_pollset { + grpc_pollset *pollset; + gpr_mu *mu; +} test_pollset; + +typedef struct test_fd { + int inner_fd; + grpc_fd *fd; +} test_fd; + +/* num_fds should be an even number */ +static void test_fd_init(test_fd *tfds, int *fds, int num_fds) { + int i; + for (i = 0; i < num_fds; i++) { + tfds[i].inner_fd = fds[i]; + tfds[i].fd = grpc_fd_create(fds[i], "test_fd"); + } +} + +static void test_fd_cleanup(grpc_exec_ctx *exec_ctx, test_fd *tfds, + int num_fds) { + int release_fd; + int i; + + for (i = 0; i < num_fds; i++) { + grpc_fd_shutdown(exec_ctx, tfds[i].fd); + grpc_exec_ctx_flush(exec_ctx); + + grpc_fd_orphan(exec_ctx, tfds[i].fd, NULL, &release_fd, "test_fd_cleanup"); + grpc_exec_ctx_flush(exec_ctx); + + GPR_ASSERT(release_fd == tfds[i].inner_fd); + close(tfds[i].inner_fd); + } +} + +static void test_pollset_init(test_pollset *pollsets, int num_pollsets) { + int i; + for (i = 0; i < num_pollsets; i++) { + pollsets[i].pollset = gpr_malloc(grpc_pollset_size()); + grpc_pollset_init(pollsets[i].pollset, &pollsets[i].mu); + } +} + +static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, + grpc_error *error) { + grpc_pollset_destroy(p); +} + +static void test_pollset_cleanup(grpc_exec_ctx *exec_ctx, + test_pollset *pollsets, int num_pollsets) { + grpc_closure destroyed; + int i; + + for (i = 0; i < num_pollsets; i++) { + grpc_closure_init(&destroyed, destroy_pollset, pollsets[i].pollset); + grpc_pollset_shutdown(exec_ctx, pollsets[i].pollset, &destroyed); + + grpc_exec_ctx_flush(exec_ctx); + gpr_free(pollsets[i].pollset); + } +} + +#define NUM_FDS 8 +#define NUM_POLLSETS 4 +/* + * Cases to test: + * case 1) Polling islands of both fd and pollset are NULL + * case 2) Polling island of fd is NULL but that of pollset is not-NULL + * case 3) Polling island of fd is not-NULL but that of pollset is NULL + * case 4) Polling islands of both fd and pollset are not-NULL and: + * case 4.1) Polling islands of fd and pollset are equal + * case 4.2) Polling islands of fd and pollset are NOT-equal (This results + * in a merge) + * */ +static void test_add_fd_to_pollset() { + grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; + test_fd tfds[NUM_FDS]; + int fds[NUM_FDS]; + test_pollset pollsets[NUM_POLLSETS]; + void *expected_pi = NULL; + int i; + int r; + + /* Create some dummy file descriptors. Currently using pipe file descriptors + * for this test but we could use any other type of file descriptors. Also, + * since pipe() used in this test creates two fds in each call, NUM_FDS should + * be an even number */ + for (i = 0; i < NUM_FDS; i = i + 2) { + r = pipe(fds + i); + if (r != 0) { + gpr_log(GPR_ERROR, "Error in creating pipe. %d (%s)", errno, + strerror(errno)); + return; + } + } + + test_fd_init(tfds, fds, NUM_FDS); + test_pollset_init(pollsets, NUM_POLLSETS); + + /*Step 1. + * Create three polling islands (This will exercise test case 1 and 2) with + * the following configuration: + * polling island 0 = { fds:0,1,2, pollsets:0} + * polling island 1 = { fds:3,4, pollsets:1} + * polling island 2 = { fds:5,6,7 pollsets:2} + * + *Step 2. + * Add pollset 3 to polling island 0 (by adding fds 0 and 1 to pollset 3) + * (This will exercise test cases 3 and 4.1). The configuration becomes: + * polling island 0 = { fds:0,1,2, pollsets:0,3} <<< pollset 3 added here + * polling island 1 = { fds:3,4, pollsets:1} + * polling island 2 = { fds:5,6,7 pollsets:2} + * + *Step 3. + * Merge polling islands 0 and 1 by adding fd 0 to pollset 1 (This will + * exercise test case 4.2). The configuration becomes: + * polling island (merged) = {fds: 0,1,2,3,4, pollsets: 0,1,3} + * polling island 2 = {fds: 5,6,7 pollsets: 2} + * + *Step 4. + * Finally do one more merge by adding fd 3 to pollset 2. + * polling island (merged) = {fds: 0,1,2,3,4,5,6,7, pollsets: 0,1,2,3} + */ + + /* == Step 1 == */ + for (i = 0; i <= 2; i++) { + grpc_pollset_add_fd(&exec_ctx, pollsets[0].pollset, tfds[i].fd); + grpc_exec_ctx_flush(&exec_ctx); + } + + for (i = 3; i <= 4; i++) { + grpc_pollset_add_fd(&exec_ctx, pollsets[1].pollset, tfds[i].fd); + grpc_exec_ctx_flush(&exec_ctx); + } + + for (i = 5; i <= 7; i++) { + grpc_pollset_add_fd(&exec_ctx, pollsets[2].pollset, tfds[i].fd); + grpc_exec_ctx_flush(&exec_ctx); + } + + /* == Step 2 == */ + for (i = 0; i <= 1; i++) { + grpc_pollset_add_fd(&exec_ctx, pollsets[3].pollset, tfds[i].fd); + grpc_exec_ctx_flush(&exec_ctx); + } + + /* == Step 3 == */ + grpc_pollset_add_fd(&exec_ctx, pollsets[1].pollset, tfds[0].fd); + grpc_exec_ctx_flush(&exec_ctx); + + /* == Step 4 == */ + grpc_pollset_add_fd(&exec_ctx, pollsets[2].pollset, tfds[3].fd); + grpc_exec_ctx_flush(&exec_ctx); + + /* All polling islands are merged at this point */ + + /* Compare Fd:0's polling island with that of all other Fds */ + expected_pi = grpc_fd_get_polling_island(tfds[0].fd); + for (i = 1; i < NUM_FDS; i++) { + GPR_ASSERT(grpc_are_polling_islands_equal( + expected_pi, grpc_fd_get_polling_island(tfds[i].fd))); + } + + /* Compare Fd:0's polling island with that of all other pollsets */ + for (i = 0; i < NUM_POLLSETS; i++) { + GPR_ASSERT(grpc_are_polling_islands_equal( + expected_pi, grpc_pollset_get_polling_island(pollsets[i].pollset))); + } + + test_fd_cleanup(&exec_ctx, tfds, NUM_FDS); + test_pollset_cleanup(&exec_ctx, pollsets, NUM_POLLSETS); + grpc_exec_ctx_finish(&exec_ctx); +} + +int main(int argc, char **argv) { + const char *poll_strategy = NULL; + grpc_test_init(argc, argv); + grpc_iomgr_init(); + + poll_strategy = grpc_get_poll_strategy_name(); + if (poll_strategy != NULL && strcmp(poll_strategy, "epoll") == 0) { + test_add_fd_to_pollset(); + } else { + gpr_log(GPR_INFO, + "Skipping the test. The test is only relevant for 'epoll' " + "strategy. and the current strategy is: '%s'", + poll_strategy); + } + grpc_iomgr_shutdown(); + return 0; +} +#else /* defined(GPR_LINUX_EPOLL) */ +int main(int argc, char **argv) { return 0; } +#endif /* !defined(GPR_LINUX_EPOLL) */ |