== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:31:08 (1770687068)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.57488 s, 12.2 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-ffff9b9ac65b6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.638826
Iter 1/10: OSS cache speed: 0.697837
Iter 1/10: ladvise speed: 0.696327
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.637763
Iter 2/10: OSS cache speed: 0.708775
Iter 2/10: ladvise speed: 0.774824
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.668901
Iter 3/10: OSS cache speed: 0.758501
Iter 3/10: ladvise speed: 0.832125
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.785811
Iter 4/10: OSS cache speed: 0.947715
Iter 4/10: ladvise speed: 1.04459
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.05038
Iter 5/10: OSS cache speed: 1.1675
Iter 5/10: ladvise speed: 1.13704
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.966009
Iter 6/10: OSS cache speed: 1.28521
Iter 6/10: ladvise speed: 1.25005
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.09113
Iter 7/10: OSS cache speed: 1.36829
Iter 7/10: ladvise speed: 1.34599
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.4715
Iter 8/10: OSS cache speed: 1.48593
Iter 8/10: ladvise speed: 1.40736
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.02486
Iter 9/10: OSS cache speed: 1.35921
Iter 9/10: ladvise speed: 1.63436
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.2625
Iter 10/10: OSS cache speed: 1.47041
Iter 10/10: ladvise speed: 2.17935
Average uncached read: .95
Average speedup with OSS cached read:  1.12 = +17%
Average speedup with ladvise willread:  1.23 = +29%
Speedup with OSS cached read less than 20%,  got 17%. Skipping ladvise willread check.
fail_loc=0