== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:50:56 (1784123456)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.64108 s, 18.6 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-ffff97a5d968d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.10127
Iter 1/10: OSS cache speed: 2.09812
Iter 1/10: ladvise speed: 2.02212
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.1546
Iter 2/10: OSS cache speed: 2.02804
Iter 2/10: ladvise speed: 1.80321
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.776475
Iter 3/10: OSS cache speed: 0.825021
Iter 3/10: ladvise speed: 0.859076
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.708524
Iter 4/10: OSS cache speed: 0.692967
Iter 4/10: ladvise speed: 0.679933
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.812231
Iter 5/10: OSS cache speed: 0.982517
Iter 5/10: ladvise speed: 1.30987
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.509279
Iter 6/10: OSS cache speed: 0.634422
Iter 6/10: ladvise speed: 0.733783
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.697616
Iter 7/10: OSS cache speed: 0.442414
Iter 7/10: ladvise speed: 0.62692
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.58733
Iter 8/10: OSS cache speed: 0.626142
Iter 8/10: ladvise speed: 0.581999
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.637038
Iter 9/10: OSS cache speed: 0.66067
Iter 9/10: ladvise speed: 0.889211
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.994381
Iter 10/10: OSS cache speed: 0.979647
Iter 10/10: ladvise speed: 1.17
Average uncached read: .99
Average speedup with OSS cached read:  .99 = +0%
Average speedup with ladvise willread:  1.06 = +7%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0