== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:59:51 (1726117191)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.11688 s, 49.5 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-ffff8800b6d36000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.75068
Iter 1/10: OSS cache speed: 1.74713
Iter 1/10: ladvise speed: 1.44732
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.50187
Iter 2/10: OSS cache speed: 1.36876
Iter 2/10: ladvise speed: 1.3639
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.3743
Iter 3/10: OSS cache speed: 1.50061
Iter 3/10: ladvise speed: 1.43777
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.42539
Iter 4/10: OSS cache speed: 1.42723
Iter 4/10: ladvise speed: 1.6619
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.64169
Iter 5/10: OSS cache speed: 1.34036
Iter 5/10: ladvise speed: 1.68383
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.34911
Iter 6/10: OSS cache speed: 1.34213
Iter 6/10: ladvise speed: 1.38936
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.40903
Iter 7/10: OSS cache speed: 1.35311
Iter 7/10: ladvise speed: 1.32243
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.48639
Iter 8/10: OSS cache speed: 1.34706
Iter 8/10: ladvise speed: 1.32829
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.33439
Iter 9/10: OSS cache speed: 1.34147
Iter 9/10: ladvise speed: 2.47146
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.61377
Iter 10/10: OSS cache speed: 1.34087
Iter 10/10: ladvise speed: 1.35371
Average uncached read: 1.68
Average speedup with OSS cached read: 1.41 = +-16.07%
Average speedup with ladvise willread: 1.54 = +-8.33%
Speedup with OSS cached read less than 20%, got -16.07%. Skipping ladvise willread check.
fail_loc=0