[LU-17755] sanity-compr test_101i: FAIL: expected 5 misses but got 6

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Affects Version/s: Lustre 2.16.0
• Labels: pfl readahead
• Severity: 3
• Assignee: Core Lustre Triage
• Reporter: Maloo

Description

This issue was created by maloo for Andreas Dilger <[e-mail]>

This issue relates to the following test suite run:
https://testing.whamcloud.com/test_sets/4380b7cd-f886-4477-99d0-e68484661e31

test_101i failed with the following error:

== sanity test 101i: allow current readahead to exceed reservation ====== 06:24:54 (1712039094)
10+0 records in
10+0 records out
10485760 bytes (10 MB, 10 MiB) copied, 0.228838 s, 45.8 MB/s
llite.lustre-ffff8896320bb000.max_read_ahead_per_file_mb=1
Reset readahead stats
llite.lustre-ffff8896320bb000.read_ahead_stats=0
5+0 records in
5+0 records out
10485760 bytes (10 MB, 10 MiB) copied, 0.3471 s, 30.2 MB/s
llite.lustre-ffff8896320bb000.read_ahead_stats=
snapshot_time             1712039095.945972104 secs.nsecs
start_time                1712039095.591196979 secs.nsecs
elapsed_time              0.354775125 secs.nsecs
hits                      2554 samples [pages]
misses                    6 samples [pages]
zero_size_window          2554 samples [pages]
failed_to_fast_read       6 samples [pages]
readahead_pages           6 samples [pages] 15 511 2554
 sanity test_101i: @@@@@@ FAIL: expected misses 5 but got 6 

Test session details:
clients: https://build.whamcloud.com/job/lustre-reviews/103767 - 4.18.0-513.18.1.el8_9.x86_64
servers: https://build.whamcloud.com/job/lustre-reviews/103767 - 4.18.0-513.18.1.el8_lustre.x86_64

This is failing with sanity-compr running with a PFL file layout compr_STRIPEPARAMS="-E 64k -c 1 -E eof" applied to the whole filesystem.

VVVVVVV DO NOT REMOVE LINES BELOW, Added by Maloo for auto-association VVVVVVV
sanity-compr test_101i - expected misses 5 but got 6

Issue Links

• is related to: LU-16904 initial test script to run sanity.sh and sanityn.sh with PFL layout
• is related to: LU-15155 Add lock request to readahead