tst.resize1.d revision 9512fe850e98fdd448c638ca63fdd92a8a510255
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9512fe850e98fdd448c638ca63fdd92a8a510255ahl * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
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9512fe850e98fdd448c638ca63fdd92a8a510255ahl#pragma ident "%Z%%M% %I% %E% SMI"
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * ASSERTION:
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * Checks that setting "bufresize" to "auto" will cause buffer
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * allocation to succeed, even for large principal buffer sizes.
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * SECTION: Buffers and Buffering/Buffer Resizing Policy;
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * Options and Tunables/bufsize;
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * Options and Tunables/bufresize
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * On some small memory machines, this test may consume so much memory
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * that it induces memory allocation failure in the dtrace library. This
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * will manifest itself as an error like one of the following:
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * dtrace: processing aborted: Memory allocation failure
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * dtrace: could not enable tracing: Memory allocation failure
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * These actually indicate that the test performed as expected; failures
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * of the above nature should therefore be ignored. If 32-bit libdtrace
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * is used to execute this test on a 64-bit kernel, the failure mode
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * becomes exceedingly likely because the kernel may be able to allocate
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * a huge hunk of memory that then requires the client to match it with
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * a malloc that exhausts the remainder of its 4GB address space. For
9512fe850e98fdd448c638ca63fdd92a8a510255ahl * this reason, we no-op the test for 32-bit clients using an ifdef.