== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:44:19 (1724305459)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 5.23948 s, 20.0 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff880136b2b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.843549
Iter 1/10: OSS cache speed: 1.05629
Iter 1/10: ladvise speed: 1.13472
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.874934
Iter 2/10: OSS cache speed: 0.879914
Iter 2/10: ladvise speed: 1.11219
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.95254
Iter 3/10: OSS cache speed: 0.985738
Iter 3/10: ladvise speed: 1.08186
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.930253
Iter 4/10: OSS cache speed: 1.06032
Iter 4/10: ladvise speed: 1.0931
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.949597
Iter 5/10: OSS cache speed: 1.00143
Iter 5/10: ladvise speed: 1.00116
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.943256
Iter 6/10: OSS cache speed: 1.09478
Iter 6/10: ladvise speed: 1.19773
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.0682
Iter 7/10: OSS cache speed: 1.11408
Iter 7/10: ladvise speed: 1.07748
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.980601
Iter 8/10: OSS cache speed: 0.981983
Iter 8/10: ladvise speed: 0.97279
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.840376
Iter 9/10: OSS cache speed: 1.05405
Iter 9/10: ladvise speed: 1.17012
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.981757
Iter 10/10: OSS cache speed: 1.02063
Iter 10/10: ladvise speed: 1.04719
Average uncached read: .93
Average speedup with OSS cached read: 1.02 = +9.67%
Average speedup with ladvise willread: 1.08 = +16.12%
Speedup with OSS cached read less than 20%, got 9.67%. Skipping ladvise willread check.
fail_loc=0