== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:12:52 (1787602372)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 17.3518 s, 6.0 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-ffff9560852aa800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.297378
Iter 1/10: OSS cache speed: 0.326827
Iter 1/10: ladvise speed: 0.316649
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.312608
Iter 2/10: OSS cache speed: 0.290412
Iter 2/10: ladvise speed: 0.315128
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.292892
Iter 3/10: OSS cache speed: 0.269948
Iter 3/10: ladvise speed: 0.295689
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.287454
Iter 4/10: OSS cache speed: 0.287582
Iter 4/10: ladvise speed: 0.294918
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.313139
Iter 5/10: OSS cache speed: 0.324786
Iter 5/10: ladvise speed: 0.349436
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.35809
Iter 6/10: OSS cache speed: 0.311013
Iter 6/10: ladvise speed: 0.35811
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.336622
Iter 7/10: OSS cache speed: 0.343268
Iter 7/10: ladvise speed: 0.343003
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.322558
Iter 8/10: OSS cache speed: 0.34834
Iter 8/10: ladvise speed: 0.327923
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.329184
Iter 9/10: OSS cache speed: 0.356784
Iter 9/10: ladvise speed: 0.308718
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.349206
Iter 10/10: OSS cache speed: 0.296534
Iter 10/10: ladvise speed: 0.347447
Average uncached read: .31
Average speedup with OSS cached read:  .31 = +0%
Average speedup with ladvise willread:  .32 = +3%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0