- sniff for PID in kernel log messages if available
- properly deal with klogd watermark in face of modified output
- deal more stringently with priority tag, must have [ following
- suppress process-name stutter in tag that can happen
- do not use : to demark tag if within [ ]
Mediatek-special change that adds <printk_state>(<cpu>)[<pid>:<comm>]
as a prefix to the printk messages. Along the lines of (simplified
for entertainment purposes, YMMV):
char tbuf[50]; /* printk prefix */
int this_cpu = smp_processor_id();
char state = __raw_get_cpu_var(printk_state);
unsigned tlen = snprintf(tbuf, sizeof(tbuf), "%c(%x)[%d:%s]",
state, this_cpu, current->pid, current->comm);
Bug: 23517551
Change-Id: I568e25c5aa6d8474835454a0e83b19c2921b7985
Only record watermark if not known, or represents the worst UID
currently under focus. This has resulted in a halving of the average
prune time in the face of heavy spam because we get less processing
spikes.
Bug: 23327476
Change-Id: I19f297042b9fc2c98d902695c1c36df1bf5cd6f6
* commit '44a7da74bd841eee680870433c1baf82325fb51e':
logd: log buffer switch to std::list
logd: white and black switch to std::list
logd: logtimes switch to std::list
logd: prune 10% or 256 entries max
Hold on to last worst uid watermark and bypass a spike to O(n*n*x)
(n=samples, x=number of spammers) wrt chatty trimming.
Bug: 23327476
Change-Id: I9f21ce95e969b67e576417a760f75c4d86acf364
Aid monotonic to realtime logging synchronization correction in
the Android ecosystem by providing a periodic notification. We
now have the following messages in the kernel logs:
- PM: suspend entry %Y-%m-%d %H:%M:%S.%09q UTC
- PM: suspend exit %Y-%m-%d %H:%M:%S.%09q UTC
- Suspended for %s.%03q seconds
- healthd: battery l=100 ... %Y-%m-%d %H:%M:%S.%09q UTC
Alter klogd to resynchronize on healthd messages as well.
NB: Time using strftime format, %q is a reference to fractional
second as introduced into log_time strptime method.
Bug: 21868540
Change-Id: I854afc0a07dff9c7f26d2b2f68990e52bf90e300
Required by logd on devices with USE_CPUSETS defined.
Make /dev/cpuset/background, /dev/cpuset/foreground and
/dev/cpuset/task writeable by system gid. Add logd to system
group for writing to cpuset files and to root group to avoid
regressions. When dropping privs, also drop supplementary groups.
Bug: 22699101
Change-Id: Icc01769b18b5e1f1649623da8325a8bfabc3a3f0
- Heuristics associated with translation of kernel messages to
Android user space logs.
- Limit is_prio to 4 characters, we got false positives on hex
values like <register contents> with no alpha chars.
- x11 and other register definitions are not valid tags, en0 is
- fix some Android coding standard issues
Change-Id: Idc3dcc53a2cb75ac38628c8ef7a5d5b53f12587a
(cherry pick from commit ed777e9eec)
Quick low-risk to resolve possible hash table corruption.
Resolved an unlikely path memory leak.
ToDo: replace lock with nested lock so no lock
helpers are required.
Bug: 22068332
Change-Id: I303ab06608502c7d61d42f111a9c43366f184d0c
Quick low-risk to resolve possible hash table corruption.
Resolved an unlikely path memory leak.
ToDo: replace lock with nested lock so no lock
helpers are required.
Bug: 22068332
Change-Id: I303ab06608502c7d61d42f111a9c43366f184d0c
(cherry pick from commit ee49c6a670)
- regression in log_strtok_r (part deux) In commit
'logd: fix kernel logline stutter'
2c3b300fd8 we introduced log_strtok_r.
as a replacement for strtok_r that dealt with a problem with
some kernel log messages. Fix is to refine definition of
is_timestamp to not match on patterns like [0], requiring
a single period. Another fix is to refine definition of
is_prio to properly escape non-digit content.
- Missing content because SYSLOG_ACTION_SIZE_BUFFER with added logging
is too short for full read of SYSLOG_ACTION_READ_ALL dropping
initial content. Add a margin for additional 1024 bytes.
- Absolute _first_ log entry has sequence number of 1, which is
specifically dropped, start sequence count at 1 rather than 0.
- Remove trailing space for efficiency.
- If tag exists but no content, trick into kernel logging.
Bug: 21851884
Change-Id: I0867a555a3bca09bbf18d18e75e41dffffe57a23
- regression in log_strtok_r (part deux) In commit
'logd: fix kernel logline stutter'
2c3b300fd8 we introduced log_strtok_r.
as a replacement for strtok_r that dealt with a problem with
some kernel log messages. Fix is to refine definition of
is_timestamp to not match on patterns like [0], requiring
a single period. Another fix is to refine definition of
is_prio to properly escape non-digit content.
- Missing content because SYSLOG_ACTION_SIZE_BUFFER with added logging
is too short for full read of SYSLOG_ACTION_READ_ALL dropping
initial content. Add a margin for additional 1024 bytes.
- Absolute _first_ log entry has sequence number of 1, which is
specifically dropped, start sequence count at 1 rather than 0.
- Remove trailing space for efficiency.
- If tag exists but no content, trick into kernel logging.
Bug: 21851884
Change-Id: I0867a555a3bca09bbf18d18e75e41dffffe57a23
(cherry pick from commit e59c469fa8)
- Default level when not specified is ANDROID_LOG_VERBOSE
which is inert.
Bug: 20416721
Bug: 19544788
Bug: 17760225
Change-Id: Icc098e53dc47ceaaeb24ec42eb6f61d6430ec2f6
- Default level when not specified is ANDROID_LOG_VERBOSE
which is inert.
Bug: 20416721
Bug: 19544788
Bug: 17760225
Change-Id: Icc098e53dc47ceaaeb24ec42eb6f61d6430ec2f6
(cherry pick from commit d98f4e8af5)
sched_batch implies only a penalty to latency in scheduling, but
does not imply that the process will be given less cpu time. Increase
the nice level to 10 to prioritize it below ui threads.
Bug: 21696721
Change-Id: I075af059dc755402f7df9b0d7a66cca921ff04b2
sched_batch implies only a penalty to latency in scheduling, but
does not imply that the process will be given less cpu time. Increase
the nice level to 10 to prioritize it below ui threads.
Bug: 21696721
Change-Id: I075af059dc755402f7df9b0d7a66cca921ff04b2
(cherry pick from commit 2c3b300fd8)
- look for cases where one log line contains two without a newline.
- rare condition, occurs when a printk does not have
a terminating newline under certain race conditions.
- the newline may be performed broken up as a second call
- the timestamps can be reversed (showing the race effects).
- driver(s) should really have the newline in their log messages.
Change-Id: Ibfb56b32047da3d6513db059ca6edad0f0105168
- look for cases where one log line contains two without a newline.
- rare condition, occurs when a printk does not have
a terminating newline under certain race conditions.
- the newline may be performed broken up as a second call
- the timestamps can be reversed (showing the race effects).
- driver(s) should really have the newline in there log messages.
Change-Id: Ibfb56b32047da3d6513db059ca6edad0f0105168
(cherry pick from commit 047cc0729f)
- Cleanup resulting from experience and feedback
- When filtering inside logd, drop any leading expire messages, they
are cluttering up leading edge of tombstones (which filter by pid)
- Increase and introduce EXPIRE_RATELIMIT from 1 to 10 seconds
- Increase EXPIRE_THRESHOLD from 4 to 10 count
- Improve the expire messages from:
logd : uid=1000(system) too chatty comm=com.google.android.phone,
expire 2800 lines
change tag to be more descriptive, and reduce accusatory tone to:
chatty : uid=1000(system) com.google.android.phone expire 2800
lines
- if the UID name forms a prefix for comm name, then drop UID name
Change-Id: Ied7cc04c0ab3ae02167649a0b97378e44ef7b588
- Cleanup resulting from experience and feedback
- When filtering inside logd, drop any leading expire messages, they
are cluttering up leading edge of tombstones (which filter by pid)
- Increase and introduce EXPIRE_RATELIMIT from 1 to 10 seconds
- Increase EXPIRE_THRESHOLD from 4 to 10 count
- Improve the expire messages from:
logd : uid=1000(system) too chatty comm=com.google.android.phone,
expire 2800 lines
change tag to be more descriptive, and reduce accusatory tone to:
chatty : uid=1000(system) com.google.android.phone expire 2800
lines
- if the UID name forms a prefix for comm name, then drop UID name
Change-Id: Ied7cc04c0ab3ae02167649a0b97378e44ef7b588
Mark Salyzyn