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lmkd: Add meminfo logging after each kill for easy troubleshooting While troubleshooting memory pressure related issues it's hard to get a good view of the memory state when lmkd kill happens. Logging relevant information from /proc/meminfo file that was used to make a kill decision is very helpful for further analysis. To do this efficiently we are using Android Logger event library functions and log the data used for kill decision after the kill signal was issued. Test: Run lmkd_unit_test and logcat -b events -v descriptive Change-Id: Id5de41b9d91a04dd5d3eb9b85d4e1babe9755628 Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2018-07-27 07:34:27 +08:00
# The entries in this file map a sparse set of log tag numbers to tag names.
# This is installed on the device, in /system/etc, and parsed by logcat.
#
# Tag numbers are decimal integers, from 0 to 2^31. (Let's leave the
# negative values alone for now.)
#
# Tag names are one or more ASCII letters and numbers or underscores, i.e.
# "[A-Z][a-z][0-9]_". Do not include spaces or punctuation (the former
# impacts log readability, the latter makes regex searches more annoying).
#
# Tag numbers and names are separated by whitespace. Blank lines and lines
# starting with '#' are ignored.
#
# Optionally, after the tag names can be put a description for the value(s)
# of the tag. Description are in the format
# (<name>|data type[|data unit])
# Multiple values are separated by commas.
#
# The data type is a number from the following values:
lmkd: Change meminfo_log into killinfo_log and log additional fields meminfo_log is used to log the state of the memory at the time of a kill. Instead of reporting kill information and meminfo separately let's combine them into one killinfo_log report. While normal logs can be trimmed by chatty, meminfo_log uses a separate log context which gives it a better chance of survival. As a result we will have all the information relevant to a kill in one report which has higher chance of surviving chatty. Bug: 74119935 Test: lmkd_unit_test Change-Id: I83a9c12d538e1fb107721b04fdafc3c6c0d83b60 Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2019-09-17 03:06:30 +08:00
# 1: int32_t
# 2: int64_t
lmkd: Add meminfo logging after each kill for easy troubleshooting While troubleshooting memory pressure related issues it's hard to get a good view of the memory state when lmkd kill happens. Logging relevant information from /proc/meminfo file that was used to make a kill decision is very helpful for further analysis. To do this efficiently we are using Android Logger event library functions and log the data used for kill decision after the kill signal was issued. Test: Run lmkd_unit_test and logcat -b events -v descriptive Change-Id: Id5de41b9d91a04dd5d3eb9b85d4e1babe9755628 Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2018-07-27 07:34:27 +08:00
# 3: string
# 4: list
#
# The data unit is a number taken from the following list:
# 1: Number of objects
# 2: Number of bytes
# 3: Number of milliseconds
# 4: Number of allocations
# 5: Id
# 6: Percent
# s: Number of seconds (monotonic time)
# Default value for data of type int/long is 2 (bytes).
#
# TODO: generate ".java" and ".h" files with integer constants from this file.
lmkd: Change meminfo_log into killinfo_log and log additional fields meminfo_log is used to log the state of the memory at the time of a kill. Instead of reporting kill information and meminfo separately let's combine them into one killinfo_log report. While normal logs can be trimmed by chatty, meminfo_log uses a separate log context which gives it a better chance of survival. As a result we will have all the information relevant to a kill in one report which has higher chance of surviving chatty. Bug: 74119935 Test: lmkd_unit_test Change-Id: I83a9c12d538e1fb107721b04fdafc3c6c0d83b60 Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2019-09-17 03:06:30 +08:00
# for killinfo logs
10195355 killinfo (Pid|1|5),(Uid|1|5),(OomAdj|1),(MinOomAdj|1),(TaskSize|1),(enum kill_reasons|1|5),(MemFree|1),(Cached|1),(SwapCached|1),(Buffers|1),(Shmem|1),(Unevictable|1),(SwapTotal|1),(SwapFree|1),(ActiveAnon|1),(InactiveAnon|1),(ActiveFile|1),(InactiveFile|1),(SReclaimable|1),(SUnreclaim|1),(KernelStack|1),(PageTables|1),(IonHeap|1),(IonHeapPool|1),(CmaFree|1)