== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:02:24 (1784278944)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.5428 s, 9.9 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-ffff98e7d3aed000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.438495
Iter 1/10: OSS cache speed: 0.394369
Iter 1/10: ladvise speed: 0.447334
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.493503
Iter 2/10: OSS cache speed: 0.495084
Iter 2/10: ladvise speed: 0.452704
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.483015
Iter 3/10: OSS cache speed: 0.511884
Iter 3/10: ladvise speed: 0.485234
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.518599
Iter 4/10: OSS cache speed: 0.621678
Iter 4/10: ladvise speed: 0.618115
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.58903
Iter 5/10: OSS cache speed: 0.634244
Iter 5/10: ladvise speed: 0.607879
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.528399
Iter 6/10: OSS cache speed: 0.564242
Iter 6/10: ladvise speed: 0.549198
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.568061
Iter 7/10: OSS cache speed: 0.626811
Iter 7/10: ladvise speed: 0.61181
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.687957
Iter 8/10: OSS cache speed: 0.760442
Iter 8/10: ladvise speed: 0.779143
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.312789
Iter 9/10: OSS cache speed: 0.48403
Iter 9/10: ladvise speed: 0.49596
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.533427
Iter 10/10: OSS cache speed: 0.528262
Iter 10/10: ladvise speed: 0.525678
Average uncached read: .51
Average speedup with OSS cached read:  .56 = +9%
Average speedup with ladvise willread:  .55 = +7%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0