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Add new collector exposing 'ksmd' stats

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Add new collector which exposes the content of /sys/kernel/mm/ksm
directory. This directory contains control and statistics files for
Kernel Samepage Merging daemon.

The collector is not enabled by default.

Signed-off-by: Pavel Borzenkov <pavel.borzenkov@gmail.com>
This commit is contained in:
Pavel Borzenkov 2015-11-11 16:02:41 +03:00
commit 0e78ed63a6
12 changed files with 120 additions and 0 deletions
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27
collector/fixtures/e2e-output.txt
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# HELP node_intr Total number of interrupts serviced.
# TYPE node_intr counter
node_intr 8.885917e+06
# HELP node_ksmd_full_scans_total ksmd 'full_scans' file.
# TYPE node_ksmd_full_scans_total counter
node_ksmd_full_scans_total 323
# HELP node_ksmd_merge_across_nodes ksmd 'merge_across_nodes' file.
# TYPE node_ksmd_merge_across_nodes gauge
node_ksmd_merge_across_nodes 1
# HELP node_ksmd_pages_shared ksmd 'pages_shared' file.
# TYPE node_ksmd_pages_shared gauge
node_ksmd_pages_shared 1
# HELP node_ksmd_pages_sharing ksmd 'pages_sharing' file.
# TYPE node_ksmd_pages_sharing gauge
node_ksmd_pages_sharing 255
# HELP node_ksmd_pages_to_scan ksmd 'pages_to_scan' file.
# TYPE node_ksmd_pages_to_scan gauge
node_ksmd_pages_to_scan 100
# HELP node_ksmd_pages_unshared ksmd 'pages_unshared' file.
# TYPE node_ksmd_pages_unshared gauge
node_ksmd_pages_unshared 0
# HELP node_ksmd_pages_volatile ksmd 'pages_volatile' file.
# TYPE node_ksmd_pages_volatile gauge
node_ksmd_pages_volatile 0
# HELP node_ksmd_run ksmd 'run' file.
# TYPE node_ksmd_run gauge
node_ksmd_run 1
# HELP node_ksmd_sleep_seconds ksmd 'sleep_millisecs' file.
# TYPE node_ksmd_sleep_seconds gauge
node_ksmd_sleep_seconds 0.02
# HELP node_load1 1m load average.
# TYPE node_load1 gauge
node_load1 0.21

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collector/fixtures/sys/kernel/mm/ksm/full_scans Normal file
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collector/fixtures/sys/kernel/mm/ksm/merge_across_nodes Normal file
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collector/fixtures/sys/kernel/mm/ksm/pages_shared Normal file
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collector/fixtures/sys/kernel/mm/ksm/pages_sharing Normal file
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255

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collector/fixtures/sys/kernel/mm/ksm/pages_to_scan Normal file
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100

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collector/fixtures/sys/kernel/mm/ksm/pages_unshared Normal file
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collector/fixtures/sys/kernel/mm/ksm/pages_volatile Normal file
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collector/fixtures/sys/kernel/mm/ksm/run Normal file
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collector/fixtures/sys/kernel/mm/ksm/sleep_millisecs Normal file
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