== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 20:01:34 (1773619294)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.41613 s, 14.1 MB/s
llite.lustre-ffff9315ac2bd000.read_ahead_stats=clear
llite.lustre-ffff9315ac2bd000.read_ahead_stats=
snapshot_time             1773619315.095472983 secs.nsecs
start_time                1773619304.682527973 secs.nsecs
elapsed_time              10.412945010 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          4 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=225459: Sun Mar 15 20:10:51 2026
  read: IOPS=9, BW=9840KiB/s (10.1MB/s)(5120MiB/532818msec)
    clat (msec): min=40, max=289, avg=103.81, stdev=40.67
     lat (msec): min=40, max=289, avg=103.82, stdev=40.67
    clat percentiles (msec):
     |  1.00th=[   62],  5.00th=[   70], 10.00th=[   74], 20.00th=[   80],
     | 30.00th=[   84], 40.00th=[   87], 50.00th=[   90], 60.00th=[   93],
     | 70.00th=[   97], 80.00th=[  107], 90.00th=[  180], 95.00th=[  192],
     | 99.00th=[  236], 99.50th=[  255], 99.90th=[  279], 99.95th=[  284],
     | 99.99th=[  292]
   bw (  KiB/s): min= 2048, max=16384, per=100.00%, avg=9870.64, stdev=3243.48, samples=1061
   iops        : min=    2, max=   16, avg= 9.45, stdev= 3.19, samples=1061
  lat (msec)   : 50=0.08%, 100=75.25%, 250=24.04%, 500=0.62%
  cpu          : usr=0.64%, sys=85.59%, ctx=14578, majf=5138, minf=1305851
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=9840KiB/s (10.1MB/s), 9840KiB/s-9840KiB/s (10.1MB/s-10.1MB/s), io=5120MiB (5369MB), run=532818-532818msec