sha1origin/pr/3098/mergeghprbActualCommit7be8df3cabf979e9ddf98ffb58597210eb2971a0ghprbActualCommitAuthorghprbActualCommitAuthorEmailghprbAuthorRepoGitUrlhttps://github.com/tuxology/bcc.gitghprbTriggerAuthorghprbTriggerAuthorEmailghprbTriggerAuthorLoginyonghong-songghprbTriggerAuthorLoginMention@yonghong-songghprbPullId3098ghprbTargetBranchmasterghprbSourceBranchtool-readaheadstatGIT_BRANCHtool-readaheadstatghprbPullAuthorEmailghprbPullAuthorLogintuxologyghprbPullAuthorLoginMention@tuxologyghprbPullDescriptionGitHub pull request #3098 of commit 7be8df3cabf979e9ddf98ffb58597210eb2971a0, no merge conflicts.ghprbPullTitletool: add readaheadstat bcc toolghprbPullLinkhttps://github.com/iovisor/bcc/pull/3098ghprbPullLongDescriptionThis tool provides two read-ahead cache statistics to understand the read-ahead cache performance for the system:\r\n\r\n- Number of pages in the cache which are left unaccessed\r\n- Age of pages in the cache along with their count presented as a histogram \r\n\r\nThis tool is based on the `readahead` example in @brendangregg 's BPF Performance Tools Book.ghprbCommentBody[buildbot, test this please]ghprbGhRepositoryiovisor/bccghprbCredentialsId6d3daf13-69b8-48b1-9c8f-ec5353264113Started by upstream project "bcc-pr" build number 684684bcc-prjob/bcc-pr/falsefc2878641081056bcc-pr » fc28 fc28684false6845481FAILURE1601054797094https://buildbot.iovisor.org/jenkins/user/davemarchevsky/my-views/view/all/job/bcc-pr/label=fc28/684/fedora28-slave-35f