== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:42:16 (1773103336)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.72545 s, 18.3 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-ffff9a51067b5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.30493
Iter 1/10: OSS cache speed: 2.4324
Iter 1/10: ladvise speed: 2.3568
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.11519
Iter 2/10: OSS cache speed: 2.11924
Iter 2/10: ladvise speed: 2.20313
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.18617
Iter 3/10: OSS cache speed: 2.40848
Iter 3/10: ladvise speed: 2.48031
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.1744
Iter 4/10: OSS cache speed: 2.12989
Iter 4/10: ladvise speed: 2.03843
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.21013
Iter 5/10: OSS cache speed: 2.42848
Iter 5/10: ladvise speed: 2.39853
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.2228
Iter 6/10: OSS cache speed: 2.44784
Iter 6/10: ladvise speed: 2.39303
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.05732
Iter 7/10: OSS cache speed: 2.28499
Iter 7/10: ladvise speed: 2.42368
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.15044
Iter 8/10: OSS cache speed: 2.29824
Iter 8/10: ladvise speed: 2.35315
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.18329
Iter 9/10: OSS cache speed: 2.32909
Iter 9/10: ladvise speed: 2.22632
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.13899
Iter 10/10: OSS cache speed: 2.41484
Iter 10/10: ladvise speed: 2.20299
Average uncached read: 2.17
Average speedup with OSS cached read:  2.32 = +6%
Average speedup with ladvise willread:  2.30 = +5%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0