== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:55:44 (1775044544)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.62793 s, 18.6 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-ffff8e9d0c8ee000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.943354
Iter 1/10: OSS cache speed: 1.0722
Iter 1/10: ladvise speed: 0.818588
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.940368
Iter 2/10: OSS cache speed: 1.13277
Iter 2/10: ladvise speed: 1.41947
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.71122
Iter 3/10: OSS cache speed: 1.65186
Iter 3/10: ladvise speed: 1.94613
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.84044
Iter 4/10: OSS cache speed: 1.85235
Iter 4/10: ladvise speed: 1.98327
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.06696
Iter 5/10: OSS cache speed: 1.99362
Iter 5/10: ladvise speed: 2.1812
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.97953
Iter 6/10: OSS cache speed: 1.92681
Iter 6/10: ladvise speed: 1.82392
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.82401
Iter 7/10: OSS cache speed: 1.75818
Iter 7/10: ladvise speed: 1.6475
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.86455
Iter 8/10: OSS cache speed: 2.04335
Iter 8/10: ladvise speed: 2.01439
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.06981
Iter 9/10: OSS cache speed: 2.0749
Iter 9/10: ladvise speed: 2.02334
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.06637
Iter 10/10: OSS cache speed: 2.22906
Iter 10/10: ladvise speed: 2.26528
Average uncached read: 1.73
Average speedup with OSS cached read:  1.77 = +2%
Average speedup with ladvise willread:  1.81 = +4%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0