== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:03:55 (1769756635)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.0782 s, 8.7 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-ffffa0e260fd6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.34113
Iter 1/10: OSS cache speed: 0.312386
Iter 1/10: ladvise speed: 0.331205
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.352233
Iter 2/10: OSS cache speed: 0.32871
Iter 2/10: ladvise speed: 0.35775
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.305409
Iter 3/10: OSS cache speed: 0.324374
Iter 3/10: ladvise speed: 0.342682
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.407454
Iter 4/10: OSS cache speed: 0.376287
Iter 4/10: ladvise speed: 0.389692
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.394913
Iter 5/10: OSS cache speed: 0.380556
Iter 5/10: ladvise speed: 0.395439
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.407449
Iter 6/10: OSS cache speed: 0.424617
Iter 6/10: ladvise speed: 0.408349
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.415592
Iter 7/10: OSS cache speed: 0.403522
Iter 7/10: ladvise speed: 0.444086
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.491428
Iter 8/10: OSS cache speed: 0.491753
Iter 8/10: ladvise speed: 0.502617
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.466866
Iter 9/10: OSS cache speed: 0.460867
Iter 9/10: ladvise speed: 0.524536
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.509857
Iter 10/10: OSS cache speed: 0.521839
Iter 10/10: ladvise speed: 0.537383
Average uncached read: .40
Average speedup with OSS cached read:  .40 = +0%
Average speedup with ladvise willread:  .42 = +5%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0