== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:55:43 (1789178143)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.1045 s, 10.4 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-ffff913b830c5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.326074
Iter 1/10: OSS cache speed: 0.313584
Iter 1/10: ladvise speed: 0.333413
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.373938
Iter 2/10: OSS cache speed: 0.332593
Iter 2/10: ladvise speed: 0.338463
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.352113
Iter 3/10: OSS cache speed: 0.332846
Iter 3/10: ladvise speed: 0.344696
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.347818
Iter 4/10: OSS cache speed: 0.360445
Iter 4/10: ladvise speed: 0.351887
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.373586
Iter 5/10: OSS cache speed: 0.332753
Iter 5/10: ladvise speed: 0.323205
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.283222
Iter 6/10: OSS cache speed: 0.363737
Iter 6/10: ladvise speed: 0.328678
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.313552
Iter 7/10: OSS cache speed: 0.365704
Iter 7/10: ladvise speed: 0.349094
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.319065
Iter 8/10: OSS cache speed: 0.346871
Iter 8/10: ladvise speed: 0.312453
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.29381
Iter 9/10: OSS cache speed: 0.334696
Iter 9/10: ladvise speed: 0.317349
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.338485
Iter 10/10: OSS cache speed: 0.3285
Iter 10/10: ladvise speed: 0.342017
Average uncached read: .33
Average speedup with OSS cached read:  .34 = +3%
Average speedup with ladvise willread:  .33 = +0%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0