== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:38:09 (1770647889)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.33619 s, 12.6 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-ffff967bc2a7b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.09591
Iter 1/10: OSS cache speed: 1.2262
Iter 1/10: ladvise speed: 1.2393
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.10298
Iter 2/10: OSS cache speed: 1.23488
Iter 2/10: ladvise speed: 1.23143
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.1014
Iter 3/10: OSS cache speed: 1.22603
Iter 3/10: ladvise speed: 1.28775
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.10738
Iter 4/10: OSS cache speed: 1.22163
Iter 4/10: ladvise speed: 1.22747
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.10189
Iter 5/10: OSS cache speed: 1.79783
Iter 5/10: ladvise speed: 2.46717
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.39337
Iter 6/10: OSS cache speed: 1.64332
Iter 6/10: ladvise speed: 1.27805
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.15634
Iter 7/10: OSS cache speed: 1.22218
Iter 7/10: ladvise speed: 1.34207
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.21177
Iter 8/10: OSS cache speed: 1.27567
Iter 8/10: ladvise speed: 1.23772
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.10284
Iter 9/10: OSS cache speed: 1.22641
Iter 9/10: ladvise speed: 1.25776
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.11012
Iter 10/10: OSS cache speed: 1.27268
Iter 10/10: ladvise speed: 1.25963
Average uncached read: 1.24
Average speedup with OSS cached read:  1.33 = +7%
Average speedup with ladvise willread:  1.38 = +11%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0