== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:15:20 (1785456920)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 17.3409 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-ffff8d3dc29d0000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.397017
Iter 1/10: OSS cache speed: 0.273041
Iter 1/10: ladvise speed: 0.26512
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.266329
Iter 2/10: OSS cache speed: 0.258203
Iter 2/10: ladvise speed: 0.297279
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.263713
Iter 3/10: OSS cache speed: 0.29498
Iter 3/10: ladvise speed: 0.218574
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.246896
Iter 4/10: OSS cache speed: 0.254663
Iter 4/10: ladvise speed: 0.261119
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.219707
Iter 5/10: OSS cache speed: 0.260964
Iter 5/10: ladvise speed: 0.220802
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.207283
Iter 6/10: OSS cache speed: 0.253406
Iter 6/10: ladvise speed: 0.228954
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.278163
Iter 7/10: OSS cache speed: 0.247403
Iter 7/10: ladvise speed: 0.271244
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.263769
Iter 8/10: OSS cache speed: 0.226072
Iter 8/10: ladvise speed: 0.269094
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.231733
Iter 9/10: OSS cache speed: 0.313142
Iter 9/10: ladvise speed: 0.249808
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.246097
Iter 10/10: OSS cache speed: 0.270414
Iter 10/10: ladvise speed: 0.250177
Average uncached read: .26
Average speedup with OSS cached read:  .26 = +0%
Average speedup with ladvise willread:  .25 = +-3%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0