== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:28:24 (1768253304)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.299 s, 9.3 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-ffff8f31c2ec3000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.495835
Iter 1/10: OSS cache speed: 0.506756
Iter 1/10: ladvise speed: 0.411367
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.507371
Iter 2/10: OSS cache speed: 0.576179
Iter 2/10: ladvise speed: 0.572977
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.587892
Iter 3/10: OSS cache speed: 0.537569
Iter 3/10: ladvise speed: 0.585058
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.528732
Iter 4/10: OSS cache speed: 0.60247
Iter 4/10: ladvise speed: 0.612526
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.606795
Iter 5/10: OSS cache speed: 0.627972
Iter 5/10: ladvise speed: 0.636951
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.663182
Iter 6/10: OSS cache speed: 0.665273
Iter 6/10: ladvise speed: 0.722835
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.675745
Iter 7/10: OSS cache speed: 0.791713
Iter 7/10: ladvise speed: 0.73471
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.392808
Iter 8/10: OSS cache speed: 0.311264
Iter 8/10: ladvise speed: 0.480656
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.490385
Iter 9/10: OSS cache speed: 0.509106
Iter 9/10: ladvise speed: 0.421132
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.401335
Iter 10/10: OSS cache speed: 0.403357
Iter 10/10: ladvise speed: 0.491432
Average uncached read: .53
Average speedup with OSS cached read:  .55 = +3%
Average speedup with ladvise willread:  .56 = +5%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0