== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:28:04 (1712010484)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.75535 s, 27.9 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-ffff8800b581d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.0935741
Iter 1/10: OSS cache speed: 0.0901456
Iter 1/10: ladvise speed: 0.0156034
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.660906
Iter 2/10: OSS cache speed: 0.798073
Iter 2/10: ladvise speed: 0.0554478
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.13297
Iter 3/10: OSS cache speed: 0.448284
Iter 3/10: ladvise speed: 0.221961
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.123522
Iter 4/10: OSS cache speed: 0.186286
Iter 4/10: ladvise speed: 0.114283
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.238225
Iter 5/10: OSS cache speed: 0.340179
Iter 5/10: ladvise speed: 0.345379
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.0868457
Iter 6/10: OSS cache speed: 0.166143
Iter 6/10: ladvise speed: 0.0994533
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.206723
Iter 7/10: OSS cache speed: 0.319273
Iter 7/10: ladvise speed: 0.116539
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.0581159
Iter 8/10: OSS cache speed: 0.228187
Iter 8/10: ladvise speed: 0.152548
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.258315
Iter 9/10: OSS cache speed: 0.137221
Iter 9/10: ladvise speed: 0.127444
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.393842
Iter 10/10: OSS cache speed: 0.155072
Iter 10/10: ladvise speed: 0.144434
Average uncached read: .32
Average speedup with OSS cached read: .28 = +-12.50%
Average speedup with ladvise willread: .13 = +-59.37%
Speedup with OSS cached read less than 20%, got -12.50%. Skipping ladvise willread check.
fail_loc=0