== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:52:38 (1781239958)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.7071 s, 7.6 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-ffff928005272800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.373559
Iter 1/10: OSS cache speed: 0.351109
Iter 1/10: ladvise speed: 0.393765
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.372812
Iter 2/10: OSS cache speed: 0.366495
Iter 2/10: ladvise speed: 0.449724
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.367391
Iter 3/10: OSS cache speed: 0.454906
Iter 3/10: ladvise speed: 0.398942
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.385016
Iter 4/10: OSS cache speed: 0.494663
Iter 4/10: ladvise speed: 0.431741
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.433284
Iter 5/10: OSS cache speed: 0.423902
Iter 5/10: ladvise speed: 0.424626
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.455914
Iter 6/10: OSS cache speed: 0.372109
Iter 6/10: ladvise speed: 0.5064
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.389107
Iter 7/10: OSS cache speed: 0.433508
Iter 7/10: ladvise speed: 0.407661
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.359014
Iter 8/10: OSS cache speed: 0.418437
Iter 8/10: ladvise speed: 0.468903
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.350744
Iter 9/10: OSS cache speed: 0.40912
Iter 9/10: ladvise speed: 0.439597
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.352862
Iter 10/10: OSS cache speed: 0.392715
Iter 10/10: ladvise speed: 0.370439
Average uncached read: .38
Average speedup with OSS cached read:  .41 = +7%
Average speedup with ladvise willread:  .42 = +10%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0