== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:52:41 (1787662361)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.2374 s, 6.5 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-ffff93805057a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.34533
Iter 1/10: OSS cache speed: 0.330549
Iter 1/10: ladvise speed: 0.36268
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.311534
Iter 2/10: OSS cache speed: 0.293106
Iter 2/10: ladvise speed: 0.316857
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.299546
Iter 3/10: OSS cache speed: 0.294314
Iter 3/10: ladvise speed: 0.299054
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.343422
Iter 4/10: OSS cache speed: 0.318983
Iter 4/10: ladvise speed: 0.309012
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.271369
Iter 5/10: OSS cache speed: 0.297667
Iter 5/10: ladvise speed: 0.321347
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.283846
Iter 6/10: OSS cache speed: 0.30289
Iter 6/10: ladvise speed: 0.324527
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.306906
Iter 7/10: OSS cache speed: 0.299832
Iter 7/10: ladvise speed: 0.349714
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.409789
Iter 8/10: OSS cache speed: 0.345688
Iter 8/10: ladvise speed: 0.420826
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.392582
Iter 9/10: OSS cache speed: 0.433189
Iter 9/10: ladvise speed: 0.414861
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.380103
Iter 10/10: OSS cache speed: 0.382617
Iter 10/10: ladvise speed: 0.336084
Average uncached read: .33
Average speedup with OSS cached read:  .32 = +-3%
Average speedup with ladvise willread:  .34 = +3%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0