== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:41:20 (1787866880)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.5941 s, 6.7 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-ffff9a55c9acb800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.370432
Iter 1/10: OSS cache speed: 0.396878
Iter 1/10: ladvise speed: 0.345854
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.378791
Iter 2/10: OSS cache speed: 0.33063
Iter 2/10: ladvise speed: 0.320595
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.332604
Iter 3/10: OSS cache speed: 0.344607
Iter 3/10: ladvise speed: 0.284932
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.297945
Iter 4/10: OSS cache speed: 0.273168
Iter 4/10: ladvise speed: 0.310914
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.314036
Iter 5/10: OSS cache speed: 0.287441
Iter 5/10: ladvise speed: 0.311531
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.283843
Iter 6/10: OSS cache speed: 0.316778
Iter 6/10: ladvise speed: 0.326094
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.327333
Iter 7/10: OSS cache speed: 0.315872
Iter 7/10: ladvise speed: 0.342422
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.309915
Iter 8/10: OSS cache speed: 0.33586
Iter 8/10: ladvise speed: 0.303515
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.362151
Iter 9/10: OSS cache speed: 0.298015
Iter 9/10: ladvise speed: 0.356689
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.354057
Iter 10/10: OSS cache speed: 0.344466
Iter 10/10: ladvise speed: 0.328527
Average uncached read: .33
Average speedup with OSS cached read:  .32 = +-3%
Average speedup with ladvise willread:  .32 = +-3%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0