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author | Jelmer Vernooij <jelmer@samba.org> | 2008-05-23 16:24:07 +0200 |
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committer | Jelmer Vernooij <jelmer@samba.org> | 2008-05-23 16:24:07 +0200 |
commit | cceac63aaab26a72e2f3fd150dd1e4e83a0e5279 (patch) | |
tree | 6203cca724fc5f17f068e3fd4d0b403fdff3f8f9 /source4/torture/raw/lookuprate.c | |
parent | 7c7880695b02df4cbe0faab959846c63d0cc0536 (diff) | |
parent | 72fce654072b2d7317ff21c95558bd365701d5dd (diff) | |
download | samba-cceac63aaab26a72e2f3fd150dd1e4e83a0e5279.tar.gz samba-cceac63aaab26a72e2f3fd150dd1e4e83a0e5279.tar.bz2 samba-cceac63aaab26a72e2f3fd150dd1e4e83a0e5279.zip |
Merge branch 'v4-0-test' of ssh://git.samba.org/data/git/samba into v4-0-wsgi
Conflicts:
source/scripting/python/samba/provision.py
(This used to be commit d27de633656f8a699222df77c4c58326890889a2)
Diffstat (limited to 'source4/torture/raw/lookuprate.c')
-rw-r--r-- | source4/torture/raw/lookuprate.c | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/source4/torture/raw/lookuprate.c b/source4/torture/raw/lookuprate.c new file mode 100644 index 0000000000..782cb1b31b --- /dev/null +++ b/source4/torture/raw/lookuprate.c @@ -0,0 +1,320 @@ +/* + File lookup rate test. + + Copyright (C) James Peach 2006 + + 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 3 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, see <http://www.gnu.org/licenses/>. +*/ + +#include "includes.h" +#include "param/param.h" +#include "system/filesys.h" +#include "torture/smbtorture.h" +#include "torture/basic/proto.h" +#include "libcli/libcli.h" +#include "torture/util.h" +#include "lib/cmdline/popt_common.h" +#include "auth/credentials/credentials.h" + +#define BASEDIR "\\lookuprate" +#define MISSINGNAME BASEDIR "\\foo" + +#define FUZZ_PERCENT 10 + +#define usec_to_sec(s) ((s) / 1000000) +#define sec_to_usec(s) ((s) * 1000000) + +struct rate_record +{ + unsigned dirent_count; + unsigned querypath_persec; + unsigned findfirst_persec; +}; + +static struct rate_record records[] = +{ + { 0, 0, 0 }, /* Base (optimal) lookup rate. */ + { 100, 0, 0}, + { 1000, 0, 0}, + { 10000, 0, 0}, + { 100000, 0, 0} +}; + +typedef NTSTATUS lookup_function(struct smbcli_tree *tree, const char * path); + +/* Test whether rhs is within fuzz% of lhs. */ +static bool fuzzily_equal(unsigned lhs, unsigned rhs, int percent) +{ + double fuzz = (double)lhs * (double)percent/100.0; + + if (((double)rhs >= ((double)lhs - fuzz)) && + ((double)rhs <= ((double)lhs + fuzz))) { + return true; + } + + return false; + +} + +static NTSTATUS fill_directory(struct smbcli_tree *tree, + const char * path, unsigned count) +{ + NTSTATUS status; + char *fname = NULL; + unsigned i; + unsigned current; + + struct timeval start; + struct timeval now; + + status = smbcli_mkdir(tree, path); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + printf("filling directory %s with %u files... ", path, count); + fflush(stdout); + + current = random(); + start = timeval_current(); + + for (i = 0; i < count; ++i) { + int fnum; + + ++current; + fname = talloc_asprintf(NULL, "%s\\fill%u", + path, current); + + fnum = smbcli_open(tree, fname, O_RDONLY|O_CREAT, + OPENX_MODE_DENY_NONE); + if (fnum < 0) { + talloc_free(fname); + return smbcli_nt_error(tree); + } + + smbcli_close(tree, fnum); + talloc_free(fname); + } + + if (count) { + double rate; + now = timeval_current(); + rate = (double)count / usec_to_sec((double)usec_time_diff(&now, &start)); + printf("%u/sec\n", (unsigned)rate); + } else { + printf("done\n"); + } + + return NT_STATUS_OK; +} + +static NTSTATUS squash_lookup_error(NTSTATUS status) +{ + if (NT_STATUS_IS_OK(status)) { + return NT_STATUS_OK; + } + + /* We don't care if the file isn't there. */ + if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_PATH_NOT_FOUND)) { + return NT_STATUS_OK; + } + + if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) { + return NT_STATUS_OK; + } + + if (NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_FILE)) { + return NT_STATUS_OK; + } + + return status; +} + +/* Look up a pathname using TRANS2_QUERY_PATH_INFORMATION. */ +static NTSTATUS querypath_lookup(struct smbcli_tree *tree, const char * path) +{ + NTSTATUS status; + time_t ftimes[3]; + size_t fsize; + uint16_t fmode; + + status = smbcli_qpathinfo(tree, path, &ftimes[0], &ftimes[1], &ftimes[2], + &fsize, &fmode); + + return squash_lookup_error(status); +} + +/* Look up a pathname using TRANS2_FIND_FIRST2. */ +static NTSTATUS findfirst_lookup(struct smbcli_tree *tree, const char * path) +{ + NTSTATUS status = NT_STATUS_OK; + + if (smbcli_list(tree, path, 0, NULL, NULL) < 0) { + status = smbcli_nt_error(tree); + } + + return squash_lookup_error(status); +} + +static NTSTATUS lookup_rate_convert(struct smbcli_tree *tree, + lookup_function lookup, const char * path, unsigned * rate) +{ + NTSTATUS status; + + struct timeval start; + struct timeval now; + unsigned count = 0; + int64_t elapsed = 0; + +#define LOOKUP_PERIOD_SEC (2) + + start = timeval_current(); + while (elapsed < sec_to_usec(LOOKUP_PERIOD_SEC)) { + + status = lookup(tree, path); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + ++count; + now = timeval_current(); + elapsed = usec_time_diff(&now, &start); + } + +#undef LOOKUP_PERIOD_SEC + + *rate = (unsigned)((double)count / (double)usec_to_sec(elapsed)); + return NT_STATUS_OK; +} + +static bool remove_working_directory(struct smbcli_tree *tree, + const char * path) +{ + int tries; + + /* Using smbcli_deltree to delete a very large number of files + * doesn't work against all servers. Work around this by + * retrying. + */ + for (tries = 0; tries < 5; ) { + int ret; + + ret = smbcli_deltree(tree, BASEDIR); + if (ret == -1) { + tries++; + printf("(%s) failed to deltree %s: %s\n", + __location__, BASEDIR, + smbcli_errstr(tree)); + continue; + } + + return true; + } + + return false; + +} + +/* Verify that looking up a file name takes constant time. + * + * This test samples the lookup rate for a non-existant filename in a + * directory, while varying the number of files in the directory. The + * lookup rate should continue to approximate the lookup rate for the + * empty directory case. + */ +bool torture_bench_lookup(struct torture_context *torture) +{ + NTSTATUS status; + bool result = false; + + int i, tries; + struct smbcli_state *cli = NULL; + + if (!torture_open_connection(&cli, torture, 0)) { + goto done; + } + + remove_working_directory(cli->tree, BASEDIR); + + for (i = 0; i < ARRAY_SIZE(records); ++i) { + printf("testing lookup rate with %u directory entries\n", + records[i].dirent_count); + + status = fill_directory(cli->tree, BASEDIR, + records[i].dirent_count); + if (!NT_STATUS_IS_OK(status)) { + printf("failed to fill directory: %s\n", nt_errstr(status)); + goto done; + } + + status = lookup_rate_convert(cli->tree, querypath_lookup, + MISSINGNAME, &records[i].querypath_persec); + if (!NT_STATUS_IS_OK(status)) { + printf("querypathinfo of %s failed: %s\n", + MISSINGNAME, nt_errstr(status)); + goto done; + } + + status = lookup_rate_convert(cli->tree, findfirst_lookup, + MISSINGNAME, &records[i].findfirst_persec); + if (!NT_STATUS_IS_OK(status)) { + printf("findfirst of %s failed: %s\n", + MISSINGNAME, nt_errstr(status)); + goto done; + } + + printf("entries = %u, querypath = %u/sec, findfirst = %u/sec\n", + records[i].dirent_count, + records[i].querypath_persec, + records[i].findfirst_persec); + + if (!remove_working_directory(cli->tree, BASEDIR)) { + goto done; + } + } + + /* Ok. We have run all our tests. Walk through the records we + * accumulated and figure out whether the lookups took constant + * time of not. + */ + for (i = 0; i < ARRAY_SIZE(records); ++i) { + if (!fuzzily_equal(records[0].querypath_persec, + records[i].querypath_persec, + FUZZ_PERCENT)) { + printf("querypath rate for %d entries differed by " + "more than %d%% from base rate\n", + records[i].dirent_count, FUZZ_PERCENT); + result = false; + } + + if (!fuzzily_equal(records[0].findfirst_persec, + records[i].findfirst_persec, + FUZZ_PERCENT)) { + printf("findfirst rate for %d entries differed by " + "more than %d%% from base rate\n", + records[i].dirent_count, FUZZ_PERCENT); + result = false; + } + } + +done: + if (cli) { + remove_working_directory(cli->tree, BASEDIR); + talloc_free(cli); + } + + return result; +} + +/* vim: set sts=8 sw=8 : */ |