== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:59:12 (1771401552)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.1182 s, 8.7 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-ffff966ad246d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.442973
Iter 1/10: OSS cache speed: 0.39913
Iter 1/10: ladvise speed: 0.457943
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.481517
Iter 2/10: OSS cache speed: 0.44247
Iter 2/10: ladvise speed: 0.487174
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.487294
Iter 3/10: OSS cache speed: 0.502007
Iter 3/10: ladvise speed: 0.504858
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.510915
Iter 4/10: OSS cache speed: 0.549003
Iter 4/10: ladvise speed: 0.563232
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.594312
Iter 5/10: OSS cache speed: 0.588501
Iter 5/10: ladvise speed: 0.655498
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.624522
Iter 6/10: OSS cache speed: 0.631854
Iter 6/10: ladvise speed: 0.678674
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.753745
Iter 7/10: OSS cache speed: 0.715827
Iter 7/10: ladvise speed: 0.889801
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.0463
Iter 8/10: OSS cache speed: 0.952558
Iter 8/10: ladvise speed: 1.00972
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.992153
Iter 9/10: OSS cache speed: 0.86908
Iter 9/10: ladvise speed: 1.00052
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.21295
Iter 10/10: OSS cache speed: 1.2544
Iter 10/10: ladvise speed: 1.279
Average uncached read: .71
Average speedup with OSS cached read:  .69 = +-2%
Average speedup with ladvise willread:  .75 = +5%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0