== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:07:38 (1780333658)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.83314 s, 10.7 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-ffff8e3410280800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.381553
Iter 1/10: OSS cache speed: 0.456678
Iter 1/10: ladvise speed: 0.456715
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.414966
Iter 2/10: OSS cache speed: 0.446433
Iter 2/10: ladvise speed: 0.440024
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.323389
Iter 3/10: OSS cache speed: 0.406684
Iter 3/10: ladvise speed: 0.405843
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.399581
Iter 4/10: OSS cache speed: 0.420802
Iter 4/10: ladvise speed: 0.407319
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.432575
Iter 5/10: OSS cache speed: 0.37107
Iter 5/10: ladvise speed: 0.412165
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.337195
Iter 6/10: OSS cache speed: 0.35901
Iter 6/10: ladvise speed: 0.402538
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.399158
Iter 7/10: OSS cache speed: 0.416517
Iter 7/10: ladvise speed: 0.324548
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.460422
Iter 8/10: OSS cache speed: 0.408103
Iter 8/10: ladvise speed: 0.45274
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.457921
Iter 9/10: OSS cache speed: 0.532749
Iter 9/10: ladvise speed: 0.502003
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.446615
Iter 10/10: OSS cache speed: 0.44275
Iter 10/10: ladvise speed: 0.456041
Average uncached read: .40
Average speedup with OSS cached read:  .42 = +5%
Average speedup with ladvise willread:  .42 = +5%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0