191 lines
6.2 KiB
Groff
Executable File
191 lines
6.2 KiB
Groff
Executable File
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.\" ========================================================================
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.\"
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.IX Title "OPENSSL_LH_STATS 3"
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.TH OPENSSL_LH_STATS 3 "2020-03-02" "3.0.0-dev" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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OPENSSL_LH_stats, OPENSSL_LH_node_stats, OPENSSL_LH_node_usage_stats,
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OPENSSL_LH_stats_bio,
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OPENSSL_LH_node_stats_bio, OPENSSL_LH_node_usage_stats_bio \- LHASH statistics
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/lhash.h>
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\&
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\& void OPENSSL_LH_stats(LHASH *table, FILE *out);
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\& void OPENSSL_LH_node_stats(LHASH *table, FILE *out);
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\& void OPENSSL_LH_node_usage_stats(LHASH *table, FILE *out);
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\&
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\& void OPENSSL_LH_stats_bio(LHASH *table, BIO *out);
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\& void OPENSSL_LH_node_stats_bio(LHASH *table, BIO *out);
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\& void OPENSSL_LH_node_usage_stats_bio(LHASH *table, BIO *out);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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The \fB\s-1LHASH\s0\fR structure records statistics about most aspects of
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accessing the hash table.
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.PP
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\&\fIOPENSSL_LH_stats()\fR prints out statistics on the size of the hash table, how
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many entries are in it, and the number and result of calls to the
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routines in this library.
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.PP
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\&\fIOPENSSL_LH_node_stats()\fR prints the number of entries for each 'bucket' in the
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hash table.
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.PP
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\&\fIOPENSSL_LH_node_usage_stats()\fR prints out a short summary of the state of the
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hash table. It prints the 'load' and the 'actual load'. The load is
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the average number of data items per 'bucket' in the hash table. The
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\&'actual load' is the average number of items per 'bucket', but only
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for buckets which contain entries. So the 'actual load' is the
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average number of searches that will need to find an item in the hash
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table, while the 'load' is the average number that will be done to
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record a miss.
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.PP
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\&\fIOPENSSL_LH_stats_bio()\fR, \fIOPENSSL_LH_node_stats_bio()\fR and \fIOPENSSL_LH_node_usage_stats_bio()\fR
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are the same as the above, except that the output goes to a \fB\s-1BIO\s0\fR.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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These functions do not return values.
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.SH "NOTE"
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.IX Header "NOTE"
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These calls should be made under a read lock. Refer to
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\&\*(L"\s-1NOTE\s0\*(R" in \s-1\fIOPENSSL_LH_COMPFUNC\s0\fR\|(3) for more details about the locks required
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when using the \s-1LHASH\s0 data structure.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIbio\fR\|(7), \s-1\fIOPENSSL_LH_COMPFUNC\s0\fR\|(3)
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2000\-2017 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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