If an USDT probe is defined within a shared object, bpftrace expects the
path to that shared object instead of an executable. This means that we
need to replace __EXE__ in the bpftrace scripts differently, depending
on whether the application was linked statically or dynamically.
This is now done by the `scripts/bpf/gen.py` script. It lists all
available probes, along with their locations, of a process. Then, it
matches them to those described in a bpftrace script replacing the
__EXE__ markers with the listed location (either a path to the
executable or a shared library). If a bpftrace script uses a probe that
isn't listed, its __EXE__ will be replaced by a path to the executable.
Signed-off-by: Konrad Sztyber <konrad.sztyber@intel.com>
Change-Id: I7c323d5f7d948ea57cf8d4d3132e4d59a2de594f
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9807
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
bpftrace scripts do not allow struct definitions after
the first probe definition (including BEGIN/END).
This is problematic for an upcoming patch which will
include some struct defintions.
So instead just add the generated BEGIN/END probes
with enum definitions to the end of the user-specified
script, instead of the beginning.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I7bc8c18c0891ee26edc099aef96ea18ed63ccb72
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9670
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Allow redirecting output to file. Using simple
"if" for an environment variable, as script arguments
number is variable and using getops seems like an
overkill.
Signed-off-by: Karol Latecki <karol.latecki@intel.com>
Change-Id: I7e219bb1fd6377bc20c44b76cec3685b32e9316c
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/8643
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Also add scripts/bpf/nvmf.bt to enable and log these
probes.
This patch also adds a script that can generate
a bpftrace script snippet with string maps for
needed enumerations (currently nvmf_tgt_state and
spdk_nvmf_subsystem_state). This allows us to
dynamically generate this from the source code, and
can be extended for other enums we may want to
add in the future.
Thanks to Michal Berger for converting my original
gen_enums.py script into gen_enums.sh!
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Signed-off-by: Michal Berger <michalx.berger@intel.com>
Change-Id: Iff34a6218aef40055ac14932eea5fc00e1c8bcf5
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/7194
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>
This script simplifies execution of bpftrace scripts
for SPDK application analysis. The script should be
invoked as:
scripts/bpftrace.sh `pidof spdk_tgt` script.bt
where 'script.bt' is the name of the bpftrace script
you wish to execute.
The script helps simplify the following:
1) replace __EXE__ markers in the bpftrace script with
the full path of the spdk executable (required for
usdt probes); it uses /proc/<pid>/exe to get the
full path
2) replace __PID__ markers in the bpftrace script with
the PID of the spdk process under analysis - this
allows for doing things like filtering system call
counts for just the SPDK process
3) invoke bpftrace with the -p <pid> option
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Ib271f26efe4ba326d951a7b30f61b22be755dda7
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/7710
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
