diff options
Diffstat (limited to 'cddl')
-rw-r--r-- | cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/misc/tst.dofmax.ksh | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/misc/tst.dofmax.ksh b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/misc/tst.dofmax.ksh new file mode 100644 index 0000000..22c267d --- /dev/null +++ b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/misc/tst.dofmax.ksh @@ -0,0 +1,97 @@ +# +# CDDL HEADER START +# +# The contents of this file are subject to the terms of the +# Common Development and Distribution License (the "License"). +# You may not use this file except in compliance with the License. +# +# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE +# or http://www.opensolaris.org/os/licensing. +# See the License for the specific language governing permissions +# and limitations under the License. +# +# When distributing Covered Code, include this CDDL HEADER in each +# file and include the License file at usr/src/OPENSOLARIS.LICENSE. +# If applicable, add the following below this CDDL HEADER, with the +# fields enclosed by brackets "[]" replaced with your own identifying +# information: Portions Copyright [yyyy] [name of copyright owner] +# +# CDDL HEADER END +# + +# +# Copyright (c) 2012, Joyent, Inc. All rights reserved. +# + +let j=8 + +enable() +{ + prog=/var/tmp/dtest.$$.d + err=/var/tmp/dtest.$$.err + + nawk -v nprobes=$1 'BEGIN { \ + for (i = 0; i < nprobes - 1; i++) { \ + printf("dtrace:::BEGIN,\n"); \ + } \ + \ + printf("dtrace:::BEGIN { exit(0); }\n"); \ + }' /dev/null > $prog + + dtrace -qs $prog > /dev/null 2> $err + + if [[ "$?" -eq 0 ]]; then + return 0 + else + if ! grep "DIF program exceeds maximum program size" $err \ + 1> /dev/null 2>&1 ; then + echo "failed to enable $prog: `cat $err`" + exit 1 + fi + + return 1 + fi +} + +# +# First, establish an upper bound +# +let upper=1 + +while enable $upper ; do + let lower=upper + let upper=upper+upper + echo success at $lower, raised to $upper +done + +# +# Now search for the highest value that can be enabled +# +while [[ "$lower" -lt "$upper" ]]; do + let guess=$(((lower + upper) / 2)) + echo "lower is $lower; upper is $upper; guess is $guess\c" + + if enable $guess ; then + if [[ $((upper - lower)) -le 2 ]]; then + let upper=guess + fi + + echo " (success)" + let lower=guess + else + echo " (failure)" + let upper=guess + fi +done + +let expected=10000 + +if [[ "$lower" -lt "$expected" ]]; then + echo "expected support for enablings of at least $expected probes; \c" + echo "found $lower" + exit 1 +fi + +echo "maximum supported enabled probes found to be $lower" +exit 0 + |