[LU-14532] sanity test_123ac: FAIL: statx --cached=always -D 100000 files is slower with statahead!

• Type: Bug
• Resolution: Duplicate
• Priority: Minor
• Affects Version/s: Lustre 2.14.0, Lustre 2.15.1
• Severity: 3
• Assignee: WC Triage
• Reporter: Maloo

Description

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

This issue relates to the following test suite run: https://testing.whamcloud.com/test_sets/322e367d-63f0-474b-b32f-c98740c8720e

test_123ac failed with the following error:

llite.lustre-ffff984843c68000.statahead_max=0
100000

real	0m0.160s
user	0m0.013s
sys	0m0.050s
statx --cached=always -D 100000 files without statahead: 1 sec
llite.lustre-ffff984843c68000.statahead_max=32
32
100000

real	0m8.003s
user	0m0.007s
sys	0m0.050s
statx --cached=always -D 100000 files with statahead: 8 sec
statahead total: 13
statahead wrong: 0
agl total: 10
llite.lustre-ffff984843c68000.statahead_max=0
100000

real	0m0.147s
user	0m0.008s
sys	0m0.045s
statx --cached=always -D 100000 files again without statahead: 0 sec
llite.lustre-ffff984843c68000.statahead_max=32
 sanity test_123ac: @@@@@@ FAIL: statx --cached=always -D 100000 files is slower with statahead! 

VVVVVVV DO NOT REMOVE LINES BELOW, Added by Maloo for auto-association VVVVVVV
sanity test_123ac - statx --cached=always -D 100000 files is slower with statahead!

Issue Links

• is duplicated by: LU-15623 sanity: test_123ac: statx -c %n %i %A %h %u %g %W %X %Z -D 100000 files is slower with statahead!
• is related to: LU-14104 sanity/123* FAIL: statx -l ... files is slower with statahead