On Wed, Jun 15, 2022 at 12:27:03PM -0300, Arnaldo Carvalho de Melo wrote: > Em Sun, Jun 12, 2022 at 06:25:09PM +0200, Jiri Olsa escreveu: > > so the problem is that we prepend init proglogue instructions > > for each program not just for the one that needs it, so it will > > mismatch later on.. the fix below makes it work for me > > > Arnaldo, > > I squashed and pushed the change below changes to my bpf/depre > > branch, could you please retest? > > Before: > > [acme@quaco perf-urgent]$ git log --oneline -5 > e2cf9d315f90670f (HEAD -> perf/urgent, five/perf/urgent) perf test topology: Use !strncmp(right platform) to fix guest PPC comparision check > 42e4fb08ff987b50 perf test: Record only user callchains on the "Check Arm64 callgraphs are complete in fp mode" test > 819d5c3cf75d0f95 perf beauty: Update copy of linux/socket.h with the kernel sources > ebdc02b3ece8238b perf test: Fix variable length array undefined behavior in bp_account > 8ff58c35adb7f118 libperf evsel: Open shouldn't leak fd on failure > [acme@quaco perf-urgent]$ sudo su - > [root@quaco ~]# perf -v > perf version 5.19.rc2.ge2cf9d315f90 > [root@quaco ~]# perf test bpf > 40: LLVM search and compile : > 40.1: Basic BPF llvm compile : Ok > 40.3: Compile source for BPF prologue generation : Ok > 40.4: Compile source for BPF relocation : Ok > 42: BPF filter : > 42.1: Basic BPF filtering : Ok > 42.2: BPF pinning : Ok > 42.3: BPF prologue generation : Ok > 63: Test libpfm4 support : > 96: perf stat --bpf-counters test : Ok > [root@quaco ~]# > > After your first patch: > > [acme@quaco perf-urgent]$ git log --oneline -5 jolsa/bpf/depre > 9317b879db422632 (jolsa/bpf/depre) perf tools: Rework prologue generation code > 4d40831f29f2c9ad perf tools: Register fallback libbpf section handler > f913ad6559e337b4 libbpf: Fix is_pow_of_2 > f175ece2e3436748 selftests/bpf: Fix tc_redirect_dtime > 7b711e721234f475 bpf, test_run: Remove unnecessary prog type checks > [acme@quaco perf-urgent]$ git cherry-pick 4d40831f29f2c9ad > [perf/urgent ab39fb6880b57507] perf tools: Register fallback libbpf section handler > Author: Jiri Olsa <jolsa@xxxxxxxxxx> > Date: Thu Apr 21 15:22:25 2022 +0200 > 1 file changed, 65 insertions(+), 11 deletions(-) > [acme@quaco perf-urgent]$ > [acme@quaco perf-urgent]$ alias m='rm -rf ~/libexec/perf-core/ ; perf stat -e cycles:u,instructions:u make -k BUILD_BPF_SKEL=1 PYTHON=python3 O=/tmp/build/perf-urgent -C tools/perf install-bin && perf test python' > [acme@quaco perf-urgent]$ rm -rf /tmp/build/perf-urgent ; mkdir -p /tmp/build/perf-urgent ; m > <SNIP> > 19: 'import perf' in python : Ok > [acme@quaco perf-urgent]$ > [acme@quaco perf-urgent]$ sudo su - > [sudo] password for acme: > [root@quaco ~]# perf test bpf > 40: LLVM search and compile : > 40.1: Basic BPF llvm compile : Ok > 40.3: Compile source for BPF prologue generation : Ok > 40.4: Compile source for BPF relocation : Ok > 42: BPF filter : > 42.1: Basic BPF filtering : Ok > 42.2: BPF pinning : Ok > 42.3: BPF prologue generation : FAILED! > 63: Test libpfm4 support : > 96: perf stat --bpf-counters test : Ok > [root@quaco ~]# > > perf test -v bpf later, lets see if landing the second patch fixes > things and this bisection problem is justified: > > [acme@quaco perf-urgent]$ git log --oneline -5 jolsa/bpf/depre > 9317b879db422632 (jolsa/bpf/depre) perf tools: Rework prologue generation code > 4d40831f29f2c9ad perf tools: Register fallback libbpf section handler > f913ad6559e337b4 libbpf: Fix is_pow_of_2 > f175ece2e3436748 selftests/bpf: Fix tc_redirect_dtime > 7b711e721234f475 bpf, test_run: Remove unnecessary prog type checks > [acme@quaco perf-urgent]$ git remote update jolsa > Fetching jolsa > [acme@quaco perf-urgent]$ git cherry-pick 9317b879db422632 > [perf/urgent 9a36c7c94e1f596d] perf tools: Rework prologue generation code > Author: Jiri Olsa <jolsa@xxxxxxxxxx> > Date: Mon May 9 22:46:20 2022 +0200 > 1 file changed, 110 insertions(+), 18 deletions(-) > [acme@quaco perf-urgent]$ > [acme@quaco perf-urgent]$ rm -rf /tmp/build/perf-urgent ; mkdir -p /tmp/build/perf-urgent ; m > <SNIP> > 19: 'import perf' in python : Ok > [acme@quaco perf-urgent]$ sudo su - > [root@quaco ~]# perf test bpf > 40: LLVM search and compile : > 40.1: Basic BPF llvm compile : Ok > 40.3: Compile source for BPF prologue generation : Ok > 40.4: Compile source for BPF relocation : Ok > 42: BPF filter : > 42.1: Basic BPF filtering : Ok > 42.2: BPF pinning : Ok > 42.3: BPF prologue generation : Ok > 63: Test libpfm4 support : > 96: perf stat --bpf-counters test : Ok > [root@quaco ~]# > > So it works in the end, can it be made to work after the first step? I > didn't check that. heya, so the first patch is preparation and the last one is the real fix at the moment it does not work without this change, so I don't think it's a problem for the bisect, is it? jirka
