== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:00:35 (1788566435)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 19.2087 s, 5.5 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-ffff97cac8fc7000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.310761
Iter 1/10: OSS cache speed: 0.365012
Iter 1/10: ladvise speed: 0.301054
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.271872
Iter 2/10: OSS cache speed: 0.265193
Iter 2/10: ladvise speed: 0.367105
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.309147
Iter 3/10: OSS cache speed: 0.352462
Iter 3/10: ladvise speed: 0.304094
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.292231
Iter 4/10: OSS cache speed: 0.276348
Iter 4/10: ladvise speed: 0.249667
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.296268
Iter 5/10: OSS cache speed: 0.277159
Iter 5/10: ladvise speed: 0.297753
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.234047
Iter 6/10: OSS cache speed: 0.28688
Iter 6/10: ladvise speed: 0.302884
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.25924
Iter 7/10: OSS cache speed: 0.322236
Iter 7/10: ladvise speed: 0.287574
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.263563
Iter 8/10: OSS cache speed: 0.289924
Iter 8/10: ladvise speed: 0.285678
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.294044
Iter 9/10: OSS cache speed: 0.301256
Iter 9/10: ladvise speed: 0.270995
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.264442
Iter 10/10: OSS cache speed: 0.296305
Iter 10/10: ladvise speed: 0.294377
Average uncached read: .27
Average speedup with OSS cached read:  .30 = +11%
Average speedup with ladvise willread:  .29 = +7%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0