== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:29:56 (1786307396)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.6295 s, 9.0 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-ffff8c7f42e48000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.463608
Iter 1/10: OSS cache speed: 0.491965
Iter 1/10: ladvise speed: 0.53141
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.476804
Iter 2/10: OSS cache speed: 0.492273
Iter 2/10: ladvise speed: 0.534308
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.473822
Iter 3/10: OSS cache speed: 0.525589
Iter 3/10: ladvise speed: 0.513063
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.457914
Iter 4/10: OSS cache speed: 0.520383
Iter 4/10: ladvise speed: 0.520559
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.47101
Iter 5/10: OSS cache speed: 0.518577
Iter 5/10: ladvise speed: 0.530157
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.491029
Iter 6/10: OSS cache speed: 0.561558
Iter 6/10: ladvise speed: 0.547451
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.497162
Iter 7/10: OSS cache speed: 0.550683
Iter 7/10: ladvise speed: 0.55443
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.513785
Iter 8/10: OSS cache speed: 0.541042
Iter 8/10: ladvise speed: 0.534142
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.471266
Iter 9/10: OSS cache speed: 0.508597
Iter 9/10: ladvise speed: 0.531621
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.50153
Iter 10/10: OSS cache speed: 0.521021
Iter 10/10: ladvise speed: 0.563407
Average uncached read: .48
Average speedup with OSS cached read:  .52 = +8%
Average speedup with ladvise willread:  .53 = +10%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0