== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:11:51 (1735099911)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.24397 s, 32.3 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-ffff88012ab31800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.24144
Iter 1/10: OSS cache speed: 1.23352
Iter 1/10: ladvise speed: 1.79924
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.71901
Iter 2/10: OSS cache speed: 1.96775
Iter 2/10: ladvise speed: 2.23594
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.56035
Iter 3/10: OSS cache speed: 2.91295
Iter 3/10: ladvise speed: 2.72943
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 3.13575
Iter 4/10: OSS cache speed: 3.3157
Iter 4/10: ladvise speed: 2.93785
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.67153
Iter 5/10: OSS cache speed: 3.09371
Iter 5/10: ladvise speed: 2.95404
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.78282
Iter 6/10: OSS cache speed: 2.96438
Iter 6/10: ladvise speed: 3.02587
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.86386
Iter 7/10: OSS cache speed: 3.03487
Iter 7/10: ladvise speed: 3.2021
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.88439
Iter 8/10: OSS cache speed: 3.18193
Iter 8/10: ladvise speed: 3.20565
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 3.03452
Iter 9/10: OSS cache speed: 3.24238
Iter 9/10: ladvise speed: 1.89146
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.64317
Iter 10/10: OSS cache speed: 2.14944
Iter 10/10: ladvise speed: 2.64454
Average uncached read: 2.75
Average speedup with OSS cached read:  2.70 = +-1%
Average speedup with ladvise willread:  2.66 = +-3%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0