sssd-systemtap - Man Page

SSSD systemtap information

Description

This manual page provides information about the systemtap functionality in sssd(8).

SystemTap Probe points have been added into various locations in SSSD code to assist in troubleshooting and analyzing performance related issues.

Sample SystemTap scripts are provided in /usr/share/sssd/systemtap/
Probes and miscellaneous functions are defined in /usr/share/systemtap/tapset/sssd.stp and /usr/share/systemtap/tapset/sssd_functions.stp respectively.

Probe Points

The information below lists the probe points and arguments available in the following format:

probe $name

Description of probe point

variable1:datatype
variable2:datatype
variable3:datatype
...

Database Transaction Probes

probe sssd_transaction_start

Start of a sysdb transaction, probes the sysdb_transaction_start() function.

nesting:integer
probestr:string

probe sssd_transaction_cancel

Cancellation of a sysdb transaction, probes the sysdb_transaction_cancel() function.

nesting:integer
probestr:string

probe sssd_transaction_commit_before

Probes the sysdb_transaction_commit_before() function.

nesting:integer
probestr:string

probe sssd_transaction_commit_after

Probes the sysdb_transaction_commit_after() function.

nesting:integer
probestr:string

LDAP Search Probes

probe sdap_search_send

Probes the sdap_get_generic_ext_send() function.

base:string
scope:integer
filter:string
attrs:string
probestr:string

probe sdap_search_recv

Probes the sdap_get_generic_ext_recv() function.

base:string
scope:integer
filter:string
probestr:string

probe sdap_parse_entry

Probes the sdap_parse_entry() function. It is called repeatedly with every received attribute.

attr:string
value:string

probe sdap_parse_entry_done

Probes the sdap_parse_entry() function. It is called when parsing of received object is finished.

probe sdap_deref_send

Probes the sdap_deref_search_send() function.

base_dn:string
deref_attr:string
probestr:string

probe sdap_deref_recv

Probes the sdap_deref_search_recv() function.

base:string
scope:integer
filter:string
probestr:string

LDAP Account Request Probes

probe sdap_acct_req_send

Probes the sdap_acct_req_send() function.

entry_type:int
filter_type:int
filter_value:string
extra_value:string

probe sdap_acct_req_recv

Probes the sdap_acct_req_recv() function.

entry_type:int
filter_type:int
filter_value:string
extra_value:string

LDAP User Search Probes

probe sdap_search_user_send

Probes the sdap_search_user_send() function.

filter:string

probe sdap_search_user_recv

Probes the sdap_search_user_recv() function.

filter:string

probe sdap_search_user_save_begin

Probes the sdap_search_user_save_begin() function.

filter:string

probe sdap_search_user_save_end

Probes the sdap_search_user_save_end() function.

filter:string

Data Provider Request Probes

probe dp_req_send

A Data Provider request is submitted.

dp_req_domain:string
dp_req_name:string
dp_req_target:int
dp_req_method:int

probe dp_req_done

A Data Provider request is completed.

dp_req_name:string
dp_req_target:int
dp_req_method:int
dp_ret:int
dp_errorstr:string

Miscellaneous Functions

The information below lists the probe points and arguments available in the following format:

function acct_req_desc(entry_type): Convert entry_type to string and return string
function sssd_acct_req_probestr(fc_name, entry_type, filter_type, filter_value, extra_value): Create probe string based on filter type
function dp_target_str(target): Convert target to string and return string
function dp_method_str(target): Convert method to string and return string

Sample Systemtap Scripts

Start the SystemTap script (stap /usr/share/sssd/systemtap/<script_name>.stp), then perform an identity operation and the script will collect information from probes.

Provided SystemTap scripts are:

dp_request.stp: Monitoring of data provider request performance.
id_perf.stp: Monitoring of id command performance.
ldap_perf.stp: Monitoring of LDAP queries.
nested_group_perf.stp: Performance of nested groups resolving.

Authors

The SSSD upstream - https://github.com/SSSD/sssd/