== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:15:25 (1786418125)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.7957 s, 8.2 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-ffff895610308000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.462886
Iter 1/10: OSS cache speed: 0.497002
Iter 1/10: ladvise speed: 0.526076
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.440995
Iter 2/10: OSS cache speed: 0.496029
Iter 2/10: ladvise speed: 0.486107
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.458166
Iter 3/10: OSS cache speed: 0.480283
Iter 3/10: ladvise speed: 0.490627
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.433117
Iter 4/10: OSS cache speed: 0.486579
Iter 4/10: ladvise speed: 0.469994
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.437325
Iter 5/10: OSS cache speed: 0.453
Iter 5/10: ladvise speed: 0.48893
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.452407
Iter 6/10: OSS cache speed: 0.488663
Iter 6/10: ladvise speed: 0.493262
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.459293
Iter 7/10: OSS cache speed: 0.49227
Iter 7/10: ladvise speed: 0.498542
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.451755
Iter 8/10: OSS cache speed: 0.51339
Iter 8/10: ladvise speed: 0.482824
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.451958
Iter 9/10: OSS cache speed: 0.535531
Iter 9/10: ladvise speed: 0.500446
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.489673
Iter 10/10: OSS cache speed: 0.51661
Iter 10/10: ladvise speed: 0.511207
Average uncached read: .45
Average speedup with OSS cached read:  .49 = +8%
Average speedup with ladvise willread:  .49 = +8%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0