== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:59:36 (1786935576)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.92617 s, 17.7 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-ffff927e8983c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.05555
Iter 1/10: OSS cache speed: 1.9906
Iter 1/10: ladvise speed: 2.05426
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.00469
Iter 2/10: OSS cache speed: 2.10658
Iter 2/10: ladvise speed: 1.9642
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.98428
Iter 3/10: OSS cache speed: 2.07192
Iter 3/10: ladvise speed: 2.09167
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.10672
Iter 4/10: OSS cache speed: 2.1092
Iter 4/10: ladvise speed: 1.96713
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.99613
Iter 5/10: OSS cache speed: 2.07696
Iter 5/10: ladvise speed: 2.12314
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.15926
Iter 6/10: OSS cache speed: 2.1655
Iter 6/10: ladvise speed: 2.13394
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.13188
Iter 7/10: OSS cache speed: 1.89406
Iter 7/10: ladvise speed: 2.18939
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.22606
Iter 8/10: OSS cache speed: 2.17838
Iter 8/10: ladvise speed: 2.15802
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.20515
Iter 9/10: OSS cache speed: 1.78652
Iter 9/10: ladvise speed: 2.24898
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.17704
Iter 10/10: OSS cache speed: 2.25347
Iter 10/10: ladvise speed: 2.19562
Average uncached read: 2.10
Average speedup with OSS cached read:  2.06 = +-1%
Average speedup with ladvise willread:  2.11 = +0%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0